./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:49:01,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:49:01,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:49:01,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:49:01,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:49:01,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:49:01,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:49:01,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:49:01,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:49:01,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:49:01,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:49:01,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:49:01,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:49:01,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:49:01,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:49:01,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:49:01,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:49:01,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:49:01,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:49:01,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:49:01,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:49:01,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:49:01,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:49:01,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:49:01,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:49:01,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:49:01,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:49:01,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:49:01,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:49:01,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:49:01,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:49:01,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:49:01,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:49:01,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:49:01,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:49:01,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:49:01,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:49:01,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:49:01,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:49:01,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:49:01,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:49:01,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:49:01,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:49:01,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:49:01,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:49:01,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:49:01,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:49:01,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:49:01,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:49:01,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:49:01,489 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:49:01,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:49:01,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:49:01,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:49:01,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:49:01,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:49:01,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:49:01,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:49:01,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:49:01,491 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:49:01,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:49:01,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:49:01,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:49:01,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:49:01,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:49:01,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:49:01,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:49:01,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:49:01,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:49:01,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:49:01,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:49:01,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:49:01,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:49:01,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:49:01,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:49:01,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:49:01,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb [2021-12-21 14:49:01,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:49:01,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:49:01,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:49:01,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:49:01,779 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:49:01,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-21 14:49:01,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc803504/2b26c014e74947e0be0aa95a87582611/FLAG1dfc374d2 [2021-12-21 14:49:02,328 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:49:02,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-21 14:49:02,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc803504/2b26c014e74947e0be0aa95a87582611/FLAG1dfc374d2 [2021-12-21 14:49:02,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc803504/2b26c014e74947e0be0aa95a87582611 [2021-12-21 14:49:02,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:49:02,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:49:02,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:49:02,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:49:02,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:49:02,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:49:02" (1/1) ... [2021-12-21 14:49:02,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de291eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:02, skipping insertion in model container [2021-12-21 14:49:02,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:49:02" (1/1) ... [2021-12-21 14:49:02,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:49:02,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:49:02,951 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.02.cil-2.c[913,926] [2021-12-21 14:49:03,015 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.02.cil-2.c[5977,5990] [2021-12-21 14:49:03,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:49:03,081 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:49:03,094 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.02.cil-2.c[913,926] [2021-12-21 14:49:03,117 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.02.cil-2.c[5977,5990] [2021-12-21 14:49:03,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:49:03,176 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:49:03,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03 WrapperNode [2021-12-21 14:49:03,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:49:03,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:49:03,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:49:03,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:49:03,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,251 INFO L137 Inliner]: procedures = 52, calls = 55, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 480 [2021-12-21 14:49:03,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:49:03,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:49:03,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:49:03,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:49:03,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:49:03,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:49:03,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:49:03,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:49:03,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (1/1) ... [2021-12-21 14:49:03,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:49:03,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:03,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 14:49:03,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 14:49:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:49:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:49:03,392 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:49:03,392 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-21 14:49:03,393 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-21 14:49:03,393 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:49:03,394 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:49:03,394 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:49:03,394 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:49:03,394 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:49:03,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:49:03,394 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:49:03,394 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:49:03,395 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:49:03,395 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:49:03,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:49:03,395 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:49:03,395 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:49:03,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:49:03,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:49:03,396 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:49:03,396 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:49:03,396 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-21 14:49:03,396 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-21 14:49:03,512 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:49:03,513 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:49:03,892 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:49:03,899 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:49:03,900 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-21 14:49:03,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:49:03 BoogieIcfgContainer [2021-12-21 14:49:03,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:49:03,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:49:03,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:49:03,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:49:03,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:49:02" (1/3) ... [2021-12-21 14:49:03,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d53d863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:49:03, skipping insertion in model container [2021-12-21 14:49:03,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:03" (2/3) ... [2021-12-21 14:49:03,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d53d863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:49:03, skipping insertion in model container [2021-12-21 14:49:03,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:49:03" (3/3) ... [2021-12-21 14:49:03,909 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-21 14:49:03,913 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:49:03,914 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:49:03,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:49:03,958 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 14:49:03,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:49:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 175 states have (on average 1.5771428571428572) internal successors, (276), 182 states have internal predecessors, (276), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-21 14:49:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 14:49:03,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:03,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:03,995 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2045589042, now seen corresponding path program 1 times [2021-12-21 14:49:04,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:04,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042813917] [2021-12-21 14:49:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:04,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:04,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:04,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 14:49:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:04,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:04,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042813917] [2021-12-21 14:49:04,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042813917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:04,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:04,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:04,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224016139] [2021-12-21 14:49:04,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:04,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:04,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:04,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:04,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:04,346 INFO L87 Difference]: Start difference. First operand has 212 states, 175 states have (on average 1.5771428571428572) internal successors, (276), 182 states have internal predecessors, (276), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:04,595 INFO L93 Difference]: Finished difference Result 478 states and 736 transitions. [2021-12-21 14:49:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:04,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-21 14:49:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:04,622 INFO L225 Difference]: With dead ends: 478 [2021-12-21 14:49:04,623 INFO L226 Difference]: Without dead ends: 271 [2021-12-21 14:49:04,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:04,631 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 357 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:04,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 551 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:49:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-21 14:49:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 265. [2021-12-21 14:49:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 224 states have (on average 1.4419642857142858) internal successors, (323), 229 states have internal predecessors, (323), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (30), 24 states have call predecessors, (30), 24 states have call successors, (30) [2021-12-21 14:49:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 381 transitions. [2021-12-21 14:49:04,720 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 381 transitions. Word has length 44 [2021-12-21 14:49:04,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:04,721 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 381 transitions. [2021-12-21 14:49:04,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 381 transitions. [2021-12-21 14:49:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:49:04,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:04,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:04,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:49:04,730 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:04,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:04,731 INFO L85 PathProgramCache]: Analyzing trace with hash 899257869, now seen corresponding path program 1 times [2021-12-21 14:49:04,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:04,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4243037] [2021-12-21 14:49:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:04,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:04,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:04,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:49:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:04,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4243037] [2021-12-21 14:49:04,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4243037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:04,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:04,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:04,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409762546] [2021-12-21 14:49:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:04,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:04,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:04,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:04,856 INFO L87 Difference]: Start difference. First operand 265 states and 381 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:05,076 INFO L93 Difference]: Finished difference Result 513 states and 721 transitions. [2021-12-21 14:49:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:05,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:49:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:05,080 INFO L225 Difference]: With dead ends: 513 [2021-12-21 14:49:05,080 INFO L226 Difference]: Without dead ends: 389 [2021-12-21 14:49:05,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:05,082 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 169 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:05,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 698 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:49:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-21 14:49:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 332. [2021-12-21 14:49:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 285 states have (on average 1.4280701754385965) internal successors, (407), 290 states have internal predecessors, (407), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2021-12-21 14:49:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 471 transitions. [2021-12-21 14:49:05,110 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 471 transitions. Word has length 45 [2021-12-21 14:49:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:05,111 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 471 transitions. [2021-12-21 14:49:05,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:05,112 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 471 transitions. [2021-12-21 14:49:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:49:05,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:05,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:05,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:49:05,116 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:05,117 INFO L85 PathProgramCache]: Analyzing trace with hash -385099592, now seen corresponding path program 1 times [2021-12-21 14:49:05,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:05,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661211046] [2021-12-21 14:49:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:05,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:49:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:05,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:05,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661211046] [2021-12-21 14:49:05,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661211046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:05,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:05,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:05,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428738532] [2021-12-21 14:49:05,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:05,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:05,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:05,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:05,185 INFO L87 Difference]: Start difference. First operand 332 states and 471 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:05,315 INFO L93 Difference]: Finished difference Result 740 states and 1030 transitions. [2021-12-21 14:49:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:05,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:49:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:05,319 INFO L225 Difference]: With dead ends: 740 [2021-12-21 14:49:05,324 INFO L226 Difference]: Without dead ends: 549 [2021-12-21 14:49:05,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:05,326 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 366 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:05,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 545 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:49:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-12-21 14:49:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 497. [2021-12-21 14:49:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 431 states have (on average 1.3851508120649652) internal successors, (597), 439 states have internal predecessors, (597), 42 states have call successors, (42), 22 states have call predecessors, (42), 22 states have return successors, (50), 36 states have call predecessors, (50), 38 states have call successors, (50) [2021-12-21 14:49:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 689 transitions. [2021-12-21 14:49:05,354 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 689 transitions. Word has length 45 [2021-12-21 14:49:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:05,355 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 689 transitions. [2021-12-21 14:49:05,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 689 transitions. [2021-12-21 14:49:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 14:49:05,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:05,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:05,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:49:05,358 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:05,358 INFO L85 PathProgramCache]: Analyzing trace with hash -748902494, now seen corresponding path program 1 times [2021-12-21 14:49:05,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:05,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353375738] [2021-12-21 14:49:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:05,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 14:49:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:49:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:49:05,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:05,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353375738] [2021-12-21 14:49:05,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353375738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:05,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:05,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:05,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130060852] [2021-12-21 14:49:05,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:05,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:05,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:05,448 INFO L87 Difference]: Start difference. First operand 497 states and 689 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:49:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:05,677 INFO L93 Difference]: Finished difference Result 1081 states and 1474 transitions. [2021-12-21 14:49:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-21 14:49:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:05,683 INFO L225 Difference]: With dead ends: 1081 [2021-12-21 14:49:05,683 INFO L226 Difference]: Without dead ends: 725 [2021-12-21 14:49:05,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:05,692 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 153 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:05,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 735 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:49:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-21 14:49:05,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 687. [2021-12-21 14:49:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 597 states have (on average 1.3350083752093802) internal successors, (797), 607 states have internal predecessors, (797), 56 states have call successors, (56), 30 states have call predecessors, (56), 32 states have return successors, (74), 50 states have call predecessors, (74), 52 states have call successors, (74) [2021-12-21 14:49:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 927 transitions. [2021-12-21 14:49:05,729 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 927 transitions. Word has length 62 [2021-12-21 14:49:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:05,729 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 927 transitions. [2021-12-21 14:49:05,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:49:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 927 transitions. [2021-12-21 14:49:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 14:49:05,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:05,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:05,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:49:05,732 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash -80982464, now seen corresponding path program 1 times [2021-12-21 14:49:05,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:05,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101769532] [2021-12-21 14:49:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:05,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:49:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 14:49:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:49:05,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:05,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101769532] [2021-12-21 14:49:05,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101769532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:05,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:05,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:05,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008121993] [2021-12-21 14:49:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:05,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:05,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:05,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:05,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:05,809 INFO L87 Difference]: Start difference. First operand 687 states and 927 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:49:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:05,942 INFO L93 Difference]: Finished difference Result 1340 states and 1780 transitions. [2021-12-21 14:49:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:05,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-21 14:49:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:05,949 INFO L225 Difference]: With dead ends: 1340 [2021-12-21 14:49:05,949 INFO L226 Difference]: Without dead ends: 886 [2021-12-21 14:49:05,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:05,953 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 353 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:05,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 542 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:49:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-21 14:49:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 831. [2021-12-21 14:49:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 725 states have (on average 1.3075862068965518) internal successors, (948), 737 states have internal predecessors, (948), 64 states have call successors, (64), 36 states have call predecessors, (64), 40 states have return successors, (88), 58 states have call predecessors, (88), 60 states have call successors, (88) [2021-12-21 14:49:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1100 transitions. [2021-12-21 14:49:05,999 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1100 transitions. Word has length 67 [2021-12-21 14:49:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:06,000 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1100 transitions. [2021-12-21 14:49:06,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:49:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1100 transitions. [2021-12-21 14:49:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:49:06,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:06,002 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] [2021-12-21 14:49:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:49:06,003 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash -294715005, now seen corresponding path program 1 times [2021-12-21 14:49:06,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:06,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700626432] [2021-12-21 14:49:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:06,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:06,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:06,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700626432] [2021-12-21 14:49:06,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700626432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:06,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:06,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:49:06,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830927826] [2021-12-21 14:49:06,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:06,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:49:06,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:49:06,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:49:06,115 INFO L87 Difference]: Start difference. First operand 831 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-21 14:49:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:06,742 INFO L93 Difference]: Finished difference Result 1141 states and 1571 transitions. [2021-12-21 14:49:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:49:06,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 69 [2021-12-21 14:49:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:06,747 INFO L225 Difference]: With dead ends: 1141 [2021-12-21 14:49:06,748 INFO L226 Difference]: Without dead ends: 1017 [2021-12-21 14:49:06,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:49:06,750 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 566 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:06,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 858 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:49:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-12-21 14:49:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 952. [2021-12-21 14:49:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 828 states have (on average 1.3333333333333333) internal successors, (1104), 841 states have internal predecessors, (1104), 75 states have call successors, (75), 42 states have call predecessors, (75), 47 states have return successors, (102), 69 states have call predecessors, (102), 71 states have call successors, (102) [2021-12-21 14:49:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1281 transitions. [2021-12-21 14:49:06,817 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1281 transitions. Word has length 69 [2021-12-21 14:49:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:06,818 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1281 transitions. [2021-12-21 14:49:06,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-21 14:49:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1281 transitions. [2021-12-21 14:49:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:49:06,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:06,821 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] [2021-12-21 14:49:06,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:49:06,821 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash -192000641, now seen corresponding path program 1 times [2021-12-21 14:49:06,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:06,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849374985] [2021-12-21 14:49:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:06,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:06,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849374985] [2021-12-21 14:49:06,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849374985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:06,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:06,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:49:06,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143029309] [2021-12-21 14:49:06,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:06,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:49:06,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:49:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:06,939 INFO L87 Difference]: Start difference. First operand 952 states and 1281 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:07,764 INFO L93 Difference]: Finished difference Result 1414 states and 1975 transitions. [2021-12-21 14:49:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:49:07,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-21 14:49:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:07,773 INFO L225 Difference]: With dead ends: 1414 [2021-12-21 14:49:07,774 INFO L226 Difference]: Without dead ends: 1169 [2021-12-21 14:49:07,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:49:07,776 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 554 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:07,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1332 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:49:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-12-21 14:49:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1066. [2021-12-21 14:49:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 924 states have (on average 1.3484848484848484) internal successors, (1246), 938 states have internal predecessors, (1246), 86 states have call successors, (86), 48 states have call predecessors, (86), 54 states have return successors, (115), 81 states have call predecessors, (115), 82 states have call successors, (115) [2021-12-21 14:49:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1447 transitions. [2021-12-21 14:49:07,837 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1447 transitions. Word has length 69 [2021-12-21 14:49:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:07,837 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1447 transitions. [2021-12-21 14:49:07,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1447 transitions. [2021-12-21 14:49:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:49:07,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:07,841 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] [2021-12-21 14:49:07,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:49:07,841 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:07,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1194784769, now seen corresponding path program 1 times [2021-12-21 14:49:07,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:07,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373611662] [2021-12-21 14:49:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:07,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:07,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:07,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:07,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:07,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:07,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:07,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:07,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373611662] [2021-12-21 14:49:07,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373611662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:07,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:07,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:49:07,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707826840] [2021-12-21 14:49:07,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:07,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:49:07,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:07,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:49:07,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:07,936 INFO L87 Difference]: Start difference. First operand 1066 states and 1447 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:08,760 INFO L93 Difference]: Finished difference Result 1815 states and 2569 transitions. [2021-12-21 14:49:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:49:08,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-21 14:49:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:08,767 INFO L225 Difference]: With dead ends: 1815 [2021-12-21 14:49:08,768 INFO L226 Difference]: Without dead ends: 1456 [2021-12-21 14:49:08,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:49:08,770 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 585 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:08,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 1024 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:49:08,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-12-21 14:49:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1295. [2021-12-21 14:49:08,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1117 states have (on average 1.370635631154879) internal successors, (1531), 1133 states have internal predecessors, (1531), 108 states have call successors, (108), 60 states have call predecessors, (108), 68 states have return successors, (145), 105 states have call predecessors, (145), 104 states have call successors, (145) [2021-12-21 14:49:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1784 transitions. [2021-12-21 14:49:08,829 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1784 transitions. Word has length 69 [2021-12-21 14:49:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:08,829 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1784 transitions. [2021-12-21 14:49:08,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1784 transitions. [2021-12-21 14:49:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:49:08,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:08,833 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] [2021-12-21 14:49:08,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:49:08,833 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:08,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:08,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2070803775, now seen corresponding path program 1 times [2021-12-21 14:49:08,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:08,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131706135] [2021-12-21 14:49:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:08,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:08,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:08,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:08,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:08,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:08,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:08,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:08,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131706135] [2021-12-21 14:49:08,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131706135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:08,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:08,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:49:08,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734435307] [2021-12-21 14:49:08,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:08,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:49:08,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:49:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:08,916 INFO L87 Difference]: Start difference. First operand 1295 states and 1784 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:09,387 INFO L93 Difference]: Finished difference Result 2032 states and 2897 transitions. [2021-12-21 14:49:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:49:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-21 14:49:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:09,395 INFO L225 Difference]: With dead ends: 2032 [2021-12-21 14:49:09,396 INFO L226 Difference]: Without dead ends: 1444 [2021-12-21 14:49:09,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:49:09,399 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 458 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:09,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 812 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:49:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-12-21 14:49:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1295. [2021-12-21 14:49:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1117 states have (on average 1.3661593554162936) internal successors, (1526), 1133 states have internal predecessors, (1526), 108 states have call successors, (108), 60 states have call predecessors, (108), 68 states have return successors, (145), 105 states have call predecessors, (145), 104 states have call successors, (145) [2021-12-21 14:49:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1779 transitions. [2021-12-21 14:49:09,465 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1779 transitions. Word has length 69 [2021-12-21 14:49:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:09,466 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1779 transitions. [2021-12-21 14:49:09,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1779 transitions. [2021-12-21 14:49:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:49:09,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:09,470 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] [2021-12-21 14:49:09,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:49:09,470 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1780262847, now seen corresponding path program 1 times [2021-12-21 14:49:09,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:09,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682881631] [2021-12-21 14:49:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:09,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:09,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:09,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:09,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:09,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:09,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:09,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682881631] [2021-12-21 14:49:09,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682881631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:09,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:09,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:49:09,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193122371] [2021-12-21 14:49:09,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:09,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:49:09,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:49:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:09,562 INFO L87 Difference]: Start difference. First operand 1295 states and 1779 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:10,461 INFO L93 Difference]: Finished difference Result 2685 states and 3828 transitions. [2021-12-21 14:49:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:49:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-21 14:49:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:10,471 INFO L225 Difference]: With dead ends: 2685 [2021-12-21 14:49:10,471 INFO L226 Difference]: Without dead ends: 2097 [2021-12-21 14:49:10,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:49:10,476 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 550 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:10,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1326 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:49:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-12-21 14:49:10,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1706. [2021-12-21 14:49:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1460 states have (on average 1.3815068493150684) internal successors, (2017), 1480 states have internal predecessors, (2017), 148 states have call successors, (148), 84 states have call predecessors, (148), 96 states have return successors, (207), 149 states have call predecessors, (207), 144 states have call successors, (207) [2021-12-21 14:49:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2372 transitions. [2021-12-21 14:49:10,565 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2372 transitions. Word has length 69 [2021-12-21 14:49:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:10,565 INFO L470 AbstractCegarLoop]: Abstraction has 1706 states and 2372 transitions. [2021-12-21 14:49:10,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2372 transitions. [2021-12-21 14:49:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:49:10,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:10,568 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] [2021-12-21 14:49:10,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:49:10,569 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:10,569 INFO L85 PathProgramCache]: Analyzing trace with hash -241922817, now seen corresponding path program 1 times [2021-12-21 14:49:10,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:10,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861641755] [2021-12-21 14:49:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:10,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:10,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:10,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:10,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:10,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:10,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:10,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861641755] [2021-12-21 14:49:10,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861641755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:10,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:10,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:49:10,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524616213] [2021-12-21 14:49:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:10,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:49:10,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:49:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:10,652 INFO L87 Difference]: Start difference. First operand 1706 states and 2372 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:11,570 INFO L93 Difference]: Finished difference Result 4076 states and 5836 transitions. [2021-12-21 14:49:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:49:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-21 14:49:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:11,584 INFO L225 Difference]: With dead ends: 4076 [2021-12-21 14:49:11,584 INFO L226 Difference]: Without dead ends: 3077 [2021-12-21 14:49:11,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:49:11,588 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 554 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:11,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1299 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:49:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-12-21 14:49:11,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2560. [2021-12-21 14:49:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2182 states have (on average 1.4055912007332723) internal successors, (3067), 2210 states have internal predecessors, (3067), 224 states have call successors, (224), 132 states have call predecessors, (224), 152 states have return successors, (345), 233 states have call predecessors, (345), 220 states have call successors, (345) [2021-12-21 14:49:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3636 transitions. [2021-12-21 14:49:11,710 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3636 transitions. Word has length 69 [2021-12-21 14:49:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:11,710 INFO L470 AbstractCegarLoop]: Abstraction has 2560 states and 3636 transitions. [2021-12-21 14:49:11,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-21 14:49:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3636 transitions. [2021-12-21 14:49:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:49:11,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:11,714 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] [2021-12-21 14:49:11,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:49:11,715 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2024458369, now seen corresponding path program 1 times [2021-12-21 14:49:11,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:11,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974041460] [2021-12-21 14:49:11,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:11,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:11,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:11,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:11,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:11,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:11,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:11,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:11,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974041460] [2021-12-21 14:49:11,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974041460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:11,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:11,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:49:11,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824113177] [2021-12-21 14:49:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:11,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:49:11,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:11,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:49:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:49:11,777 INFO L87 Difference]: Start difference. First operand 2560 states and 3636 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-21 14:49:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:12,563 INFO L93 Difference]: Finished difference Result 5934 states and 8606 transitions. [2021-12-21 14:49:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:49:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 69 [2021-12-21 14:49:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:12,584 INFO L225 Difference]: With dead ends: 5934 [2021-12-21 14:49:12,584 INFO L226 Difference]: Without dead ends: 4082 [2021-12-21 14:49:12,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:49:12,592 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 684 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:12,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 1018 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:49:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-12-21 14:49:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3500. [2021-12-21 14:49:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 2964 states have (on average 1.4021592442645074) internal successors, (4156), 3009 states have internal predecessors, (4156), 320 states have call successors, (320), 186 states have call predecessors, (320), 214 states have return successors, (469), 320 states have call predecessors, (469), 316 states have call successors, (469) [2021-12-21 14:49:12,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 4945 transitions. [2021-12-21 14:49:12,809 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 4945 transitions. Word has length 69 [2021-12-21 14:49:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:12,810 INFO L470 AbstractCegarLoop]: Abstraction has 3500 states and 4945 transitions. [2021-12-21 14:49:12,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-21 14:49:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 4945 transitions. [2021-12-21 14:49:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:49:12,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:12,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:12,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:49:12,815 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:12,815 INFO L85 PathProgramCache]: Analyzing trace with hash 688510564, now seen corresponding path program 1 times [2021-12-21 14:49:12,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:12,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857748983] [2021-12-21 14:49:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:12,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:12,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:12,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:49:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:12,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:49:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 14:49:12,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:12,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857748983] [2021-12-21 14:49:12,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857748983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:12,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101256684] [2021-12-21 14:49:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:12,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:12,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:12,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:12,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:49:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:49:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:49:13,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:13,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101256684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:13,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:13,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:49:13,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146659772] [2021-12-21 14:49:13,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:13,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:13,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:13,150 INFO L87 Difference]: Start difference. First operand 3500 states and 4945 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:49:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:13,306 INFO L93 Difference]: Finished difference Result 4043 states and 5668 transitions. [2021-12-21 14:49:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:13,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2021-12-21 14:49:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:13,323 INFO L225 Difference]: With dead ends: 4043 [2021-12-21 14:49:13,323 INFO L226 Difference]: Without dead ends: 3498 [2021-12-21 14:49:13,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:13,327 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 72 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:13,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 600 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:13,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-12-21 14:49:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3454. [2021-12-21 14:49:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 2924 states have (on average 1.3991108071135432) internal successors, (4091), 2969 states have internal predecessors, (4091), 316 states have call successors, (316), 184 states have call predecessors, (316), 212 states have return successors, (463), 316 states have call predecessors, (463), 312 states have call successors, (463) [2021-12-21 14:49:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 4870 transitions. [2021-12-21 14:49:13,498 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 4870 transitions. Word has length 68 [2021-12-21 14:49:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:13,498 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 4870 transitions. [2021-12-21 14:49:13,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:49:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 4870 transitions. [2021-12-21 14:49:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:49:13,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:13,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:13,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:13,715 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,SelfDestructingSolverStorable12 [2021-12-21 14:49:13,716 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:13,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:13,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1426484957, now seen corresponding path program 1 times [2021-12-21 14:49:13,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:13,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571799546] [2021-12-21 14:49:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:13,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:13,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:13,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:49:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:13,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:49:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:49:13,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:13,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571799546] [2021-12-21 14:49:13,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571799546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:13,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188853721] [2021-12-21 14:49:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:13,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:13,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:13,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:49:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:13,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 14:49:13,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:14,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:49:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:49:14,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188853721] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:14,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 14:49:14,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-21 14:49:14,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290242426] [2021-12-21 14:49:14,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:14,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:14,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:14,184 INFO L87 Difference]: Start difference. First operand 3454 states and 4870 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:49:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:14,374 INFO L93 Difference]: Finished difference Result 3506 states and 4932 transitions. [2021-12-21 14:49:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 14:49:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-21 14:49:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:14,390 INFO L225 Difference]: With dead ends: 3506 [2021-12-21 14:49:14,391 INFO L226 Difference]: Without dead ends: 3503 [2021-12-21 14:49:14,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:49:14,393 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 493 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:14,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 376 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:49:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2021-12-21 14:49:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3453. [2021-12-21 14:49:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 2924 states have (on average 1.3984268125854993) internal successors, (4089), 2968 states have internal predecessors, (4089), 315 states have call successors, (315), 184 states have call predecessors, (315), 212 states have return successors, (463), 316 states have call predecessors, (463), 312 states have call successors, (463) [2021-12-21 14:49:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 4867 transitions. [2021-12-21 14:49:14,607 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 4867 transitions. Word has length 68 [2021-12-21 14:49:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:14,607 INFO L470 AbstractCegarLoop]: Abstraction has 3453 states and 4867 transitions. [2021-12-21 14:49:14,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:49:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 4867 transitions. [2021-12-21 14:49:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:49:14,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:14,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:14,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:14,831 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,SelfDestructingSolverStorable13 [2021-12-21 14:49:14,831 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:14,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1272047869, now seen corresponding path program 1 times [2021-12-21 14:49:14,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:14,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114925419] [2021-12-21 14:49:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:14,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:14,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:14,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:49:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:14,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:49:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:49:14,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114925419] [2021-12-21 14:49:14,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114925419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148255572] [2021-12-21 14:49:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:14,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:14,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:14,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:49:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:14,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:49:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:15,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:49:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:49:15,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148255572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:49:15,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:49:15,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-21 14:49:15,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130420580] [2021-12-21 14:49:15,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:49:15,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 14:49:15,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:15,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 14:49:15,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:49:15,465 INFO L87 Difference]: Start difference. First operand 3453 states and 4867 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:49:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:16,636 INFO L93 Difference]: Finished difference Result 4963 states and 6805 transitions. [2021-12-21 14:49:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 14:49:16,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-21 14:49:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:16,657 INFO L225 Difference]: With dead ends: 4963 [2021-12-21 14:49:16,657 INFO L226 Difference]: Without dead ends: 4467 [2021-12-21 14:49:16,662 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 [2021-12-21 14:49:16,662 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 664 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 2611 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:16,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 2611 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:49:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2021-12-21 14:49:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3832. [2021-12-21 14:49:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3264 states have (on average 1.3789828431372548) internal successors, (4501), 3316 states have internal predecessors, (4501), 335 states have call successors, (335), 198 states have call predecessors, (335), 231 states have return successors, (497), 333 states have call predecessors, (497), 332 states have call successors, (497) [2021-12-21 14:49:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5333 transitions. [2021-12-21 14:49:16,877 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5333 transitions. Word has length 69 [2021-12-21 14:49:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:16,877 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 5333 transitions. [2021-12-21 14:49:16,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:49:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5333 transitions. [2021-12-21 14:49:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 14:49:16,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:16,884 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:16,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:17,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:17,103 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash -290000336, now seen corresponding path program 1 times [2021-12-21 14:49:17,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:17,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370236644] [2021-12-21 14:49:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:17,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:17,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:17,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:49:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:17,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:49:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 14:49:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 14:49:17,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:17,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370236644] [2021-12-21 14:49:17,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370236644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:17,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556615036] [2021-12-21 14:49:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:17,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:17,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:17,171 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:17,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:49:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:17,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:49:17,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:49:17,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:17,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556615036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:17,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:17,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:49:17,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822339737] [2021-12-21 14:49:17,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:17,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:17,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:17,435 INFO L87 Difference]: Start difference. First operand 3832 states and 5333 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:49:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:17,590 INFO L93 Difference]: Finished difference Result 4523 states and 6208 transitions. [2021-12-21 14:49:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-21 14:49:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:17,606 INFO L225 Difference]: With dead ends: 4523 [2021-12-21 14:49:17,606 INFO L226 Difference]: Without dead ends: 3754 [2021-12-21 14:49:17,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:17,611 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 247 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:17,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 391 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-12-21 14:49:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3745. [2021-12-21 14:49:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 3187 states have (on average 1.3796673988076562) internal successors, (4397), 3238 states have internal predecessors, (4397), 331 states have call successors, (331), 194 states have call predecessors, (331), 225 states have return successors, (489), 328 states have call predecessors, (489), 328 states have call successors, (489) [2021-12-21 14:49:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 5217 transitions. [2021-12-21 14:49:17,840 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 5217 transitions. Word has length 88 [2021-12-21 14:49:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:17,840 INFO L470 AbstractCegarLoop]: Abstraction has 3745 states and 5217 transitions. [2021-12-21 14:49:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:49:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 5217 transitions. [2021-12-21 14:49:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 14:49:17,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:17,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:17,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:18,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 14:49:18,075 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:18,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1575033221, now seen corresponding path program 1 times [2021-12-21 14:49:18,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:18,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418334265] [2021-12-21 14:49:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:18,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:49:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:49:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 14:49:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 14:49:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 14:49:18,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:18,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418334265] [2021-12-21 14:49:18,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418334265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:18,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650268591] [2021-12-21 14:49:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:18,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:18,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:18,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 14:49:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:49:18,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:49:18,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:18,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650268591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:18,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:18,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:49:18,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145658000] [2021-12-21 14:49:18,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:18,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:18,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:18,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:18,396 INFO L87 Difference]: Start difference. First operand 3745 states and 5217 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:49:18,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:18,520 INFO L93 Difference]: Finished difference Result 4122 states and 5678 transitions. [2021-12-21 14:49:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:18,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-21 14:49:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:18,532 INFO L225 Difference]: With dead ends: 4122 [2021-12-21 14:49:18,532 INFO L226 Difference]: Without dead ends: 2804 [2021-12-21 14:49:18,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:18,537 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 61 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:18,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 595 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-12-21 14:49:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2804. [2021-12-21 14:49:18,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2349 states have (on average 1.4355044699872286) internal successors, (3372), 2384 states have internal predecessors, (3372), 274 states have call successors, (274), 157 states have call predecessors, (274), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2021-12-21 14:49:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4043 transitions. [2021-12-21 14:49:18,729 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4043 transitions. Word has length 103 [2021-12-21 14:49:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:18,729 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 4043 transitions. [2021-12-21 14:49:18,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:49:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4043 transitions. [2021-12-21 14:49:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 14:49:18,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:18,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:18,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:18,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 14:49:18,952 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1375832156, now seen corresponding path program 1 times [2021-12-21 14:49:18,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:18,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982380064] [2021-12-21 14:49:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:18,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:18,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:19,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:19,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:19,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:49:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:19,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:19,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:49:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:49:19,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982380064] [2021-12-21 14:49:19,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982380064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461670350] [2021-12-21 14:49:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:19,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:19,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:19,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:19,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 14:49:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:49:19,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 14:49:19,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:19,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461670350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:19,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:19,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:49:19,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890178017] [2021-12-21 14:49:19,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:19,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:19,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:19,336 INFO L87 Difference]: Start difference. First operand 2804 states and 4043 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:49:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:19,543 INFO L93 Difference]: Finished difference Result 8245 states and 11965 transitions. [2021-12-21 14:49:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:19,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-12-21 14:49:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:19,594 INFO L225 Difference]: With dead ends: 8245 [2021-12-21 14:49:19,594 INFO L226 Difference]: Without dead ends: 5453 [2021-12-21 14:49:19,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:19,601 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 152 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:19,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 374 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-12-21 14:49:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 5397. [2021-12-21 14:49:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5397 states, 4528 states have (on average 1.4339664310954063) internal successors, (6493), 4596 states have internal predecessors, (6493), 512 states have call successors, (512), 309 states have call predecessors, (512), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2021-12-21 14:49:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5397 states to 5397 states and 7750 transitions. [2021-12-21 14:49:19,864 INFO L78 Accepts]: Start accepts. Automaton has 5397 states and 7750 transitions. Word has length 111 [2021-12-21 14:49:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:19,865 INFO L470 AbstractCegarLoop]: Abstraction has 5397 states and 7750 transitions. [2021-12-21 14:49:19,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:49:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5397 states and 7750 transitions. [2021-12-21 14:49:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 14:49:19,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:19,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:19,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:20,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 14:49:20,102 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash 483275324, now seen corresponding path program 1 times [2021-12-21 14:49:20,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:20,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539680298] [2021-12-21 14:49:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:20,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:49:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:49:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:49:20,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:20,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539680298] [2021-12-21 14:49:20,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539680298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:20,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113070354] [2021-12-21 14:49:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:20,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:20,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:20,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 14:49:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:20,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:49:20,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 14:49:20,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:20,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113070354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:20,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:20,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:49:20,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894382510] [2021-12-21 14:49:20,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:20,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:20,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:20,465 INFO L87 Difference]: Start difference. First operand 5397 states and 7750 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 14:49:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:20,943 INFO L93 Difference]: Finished difference Result 15785 states and 22914 transitions. [2021-12-21 14:49:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:20,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2021-12-21 14:49:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:20,983 INFO L225 Difference]: With dead ends: 15785 [2021-12-21 14:49:20,983 INFO L226 Difference]: Without dead ends: 10401 [2021-12-21 14:49:20,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:20,999 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 153 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:21,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 544 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2021-12-21 14:49:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 10401. [2021-12-21 14:49:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10401 states, 8719 states have (on average 1.4182819130634248) internal successors, (12366), 8836 states have internal predecessors, (12366), 977 states have call successors, (977), 609 states have call predecessors, (977), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2021-12-21 14:49:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10401 states to 10401 states and 14939 transitions. [2021-12-21 14:49:21,642 INFO L78 Accepts]: Start accepts. Automaton has 10401 states and 14939 transitions. Word has length 111 [2021-12-21 14:49:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:21,642 INFO L470 AbstractCegarLoop]: Abstraction has 10401 states and 14939 transitions. [2021-12-21 14:49:21,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 14:49:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 10401 states and 14939 transitions. [2021-12-21 14:49:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 14:49:21,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:21,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:21,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:21,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:21,887 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash 142639029, now seen corresponding path program 1 times [2021-12-21 14:49:21,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:21,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480915196] [2021-12-21 14:49:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:21,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:21,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:21,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:21,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:21,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:21,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:49:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:22,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:49:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:22,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:22,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-21 14:49:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 14:49:22,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480915196] [2021-12-21 14:49:22,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480915196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93241102] [2021-12-21 14:49:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:22,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:22,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:22,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 14:49:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:22,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:49:22,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 14:49:22,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:22,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93241102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:22,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:22,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:49:22,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550818689] [2021-12-21 14:49:22,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:22,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:22,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:22,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:22,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:22,386 INFO L87 Difference]: Start difference. First operand 10401 states and 14939 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 14:49:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:23,171 INFO L93 Difference]: Finished difference Result 30737 states and 44476 transitions. [2021-12-21 14:49:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:23,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2021-12-21 14:49:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:23,263 INFO L225 Difference]: With dead ends: 30737 [2021-12-21 14:49:23,264 INFO L226 Difference]: Without dead ends: 20353 [2021-12-21 14:49:23,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:23,305 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 110 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:23,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 395 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20353 states. [2021-12-21 14:49:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20353 to 20141. [2021-12-21 14:49:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20141 states, 16879 states have (on average 1.4133538716748621) internal successors, (23856), 17110 states have internal predecessors, (23856), 1871 states have call successors, (1871), 1199 states have call predecessors, (1871), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2021-12-21 14:49:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20141 states to 20141 states and 28765 transitions. [2021-12-21 14:49:24,366 INFO L78 Accepts]: Start accepts. Automaton has 20141 states and 28765 transitions. Word has length 143 [2021-12-21 14:49:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:24,367 INFO L470 AbstractCegarLoop]: Abstraction has 20141 states and 28765 transitions. [2021-12-21 14:49:24,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 14:49:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 20141 states and 28765 transitions. [2021-12-21 14:49:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:49:24,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:24,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:24,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:24,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:24,658 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash 28732006, now seen corresponding path program 1 times [2021-12-21 14:49:24,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:24,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547821868] [2021-12-21 14:49:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:24,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 14:49:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 14:49:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 14:49:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-21 14:49:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 14:49:24,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:24,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547821868] [2021-12-21 14:49:24,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547821868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:24,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660519062] [2021-12-21 14:49:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:24,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:24,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:24,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:24,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 14:49:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:24,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:49:24,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:49:25,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:25,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660519062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:25,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:25,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:49:25,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534289429] [2021-12-21 14:49:25,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:25,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:25,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:25,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:25,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:25,165 INFO L87 Difference]: Start difference. First operand 20141 states and 28765 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:49:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:26,135 INFO L93 Difference]: Finished difference Result 42657 states and 61614 transitions. [2021-12-21 14:49:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:26,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-21 14:49:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:26,223 INFO L225 Difference]: With dead ends: 42657 [2021-12-21 14:49:26,224 INFO L226 Difference]: Without dead ends: 22535 [2021-12-21 14:49:26,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:26,283 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 130 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:26,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 226 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:26,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22535 states. [2021-12-21 14:49:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22535 to 22535. [2021-12-21 14:49:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22535 states, 19061 states have (on average 1.3748491684591575) internal successors, (26206), 19292 states have internal predecessors, (26206), 1925 states have call successors, (1925), 1357 states have call predecessors, (1925), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2021-12-21 14:49:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22535 states to 22535 states and 31237 transitions. [2021-12-21 14:49:27,560 INFO L78 Accepts]: Start accepts. Automaton has 22535 states and 31237 transitions. Word has length 160 [2021-12-21 14:49:27,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:27,560 INFO L470 AbstractCegarLoop]: Abstraction has 22535 states and 31237 transitions. [2021-12-21 14:49:27,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:49:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 22535 states and 31237 transitions. [2021-12-21 14:49:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 14:49:27,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:27,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:27,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-21 14:49:27,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:27,858 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash -124896125, now seen corresponding path program 1 times [2021-12-21 14:49:27,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:27,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709738693] [2021-12-21 14:49:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:27,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 14:49:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 14:49:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 14:49:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-21 14:49:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 14:49:27,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:27,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709738693] [2021-12-21 14:49:27,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709738693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:27,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169524593] [2021-12-21 14:49:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:27,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:27,961 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:27,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 14:49:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:49:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-21 14:49:28,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:28,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169524593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:28,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:28,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:49:28,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987410331] [2021-12-21 14:49:28,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:28,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:28,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:28,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:28,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:28,305 INFO L87 Difference]: Start difference. First operand 22535 states and 31237 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:49:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:29,390 INFO L93 Difference]: Finished difference Result 39568 states and 54775 transitions. [2021-12-21 14:49:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:29,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-21 14:49:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:29,472 INFO L225 Difference]: With dead ends: 39568 [2021-12-21 14:49:29,472 INFO L226 Difference]: Without dead ends: 24075 [2021-12-21 14:49:29,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:29,516 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 131 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:29,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 392 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24075 states. [2021-12-21 14:49:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24075 to 23935. [2021-12-21 14:49:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23935 states, 20349 states have (on average 1.350140056022409) internal successors, (27474), 20580 states have internal predecessors, (27474), 1945 states have call successors, (1945), 1449 states have call predecessors, (1945), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2021-12-21 14:49:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23935 states to 23935 states and 32637 transitions. [2021-12-21 14:49:30,933 INFO L78 Accepts]: Start accepts. Automaton has 23935 states and 32637 transitions. Word has length 160 [2021-12-21 14:49:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:30,934 INFO L470 AbstractCegarLoop]: Abstraction has 23935 states and 32637 transitions. [2021-12-21 14:49:30,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:49:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 23935 states and 32637 transitions. [2021-12-21 14:49:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-21 14:49:30,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:30,985 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:31,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:31,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-21 14:49:31,199 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:31,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash -402645848, now seen corresponding path program 1 times [2021-12-21 14:49:31,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:31,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420500358] [2021-12-21 14:49:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:31,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:49:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 14:49:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 14:49:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:49:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 14:49:31,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:31,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420500358] [2021-12-21 14:49:31,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420500358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:31,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855342434] [2021-12-21 14:49:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:31,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:31,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:31,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:31,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 14:49:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:31,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:49:31,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 14:49:31,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:31,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855342434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:31,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:31,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:49:31,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895340838] [2021-12-21 14:49:31,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:31,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:31,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:31,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:31,714 INFO L87 Difference]: Start difference. First operand 23935 states and 32637 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 14:49:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:33,337 INFO L93 Difference]: Finished difference Result 70545 states and 97151 transitions. [2021-12-21 14:49:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:33,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-21 14:49:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:33,527 INFO L225 Difference]: With dead ends: 70545 [2021-12-21 14:49:33,528 INFO L226 Difference]: Without dead ends: 46629 [2021-12-21 14:49:33,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:33,606 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 163 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:33,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 553 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46629 states. [2021-12-21 14:49:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46629 to 46585. [2021-12-21 14:49:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 39585 states have (on average 1.338890994063408) internal successors, (53000), 40046 states have internal predecessors, (53000), 3775 states have call successors, (3775), 2841 states have call predecessors, (3775), 3224 states have return successors, (7134), 3761 states have call predecessors, (7134), 3773 states have call successors, (7134) [2021-12-21 14:49:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 63909 transitions. [2021-12-21 14:49:36,558 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 63909 transitions. Word has length 161 [2021-12-21 14:49:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:36,559 INFO L470 AbstractCegarLoop]: Abstraction has 46585 states and 63909 transitions. [2021-12-21 14:49:36,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 14:49:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 63909 transitions. [2021-12-21 14:49:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-21 14:49:36,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:36,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:36,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-21 14:49:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-21 14:49:36,874 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1546394152, now seen corresponding path program 1 times [2021-12-21 14:49:36,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:36,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172934192] [2021-12-21 14:49:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:36,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:49:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 14:49:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:49:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:49:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-21 14:49:36,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:36,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172934192] [2021-12-21 14:49:36,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172934192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:36,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426527346] [2021-12-21 14:49:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:36,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:36,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:36,991 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:36,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 14:49:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:37,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:49:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 14:49:37,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:37,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426527346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:37,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:37,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:49:37,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547083539] [2021-12-21 14:49:37,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:37,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:37,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:37,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:37,305 INFO L87 Difference]: Start difference. First operand 46585 states and 63909 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:49:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:39,262 INFO L93 Difference]: Finished difference Result 76949 states and 107564 transitions. [2021-12-21 14:49:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:39,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2021-12-21 14:49:39,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:39,370 INFO L225 Difference]: With dead ends: 76949 [2021-12-21 14:49:39,371 INFO L226 Difference]: Without dead ends: 39401 [2021-12-21 14:49:39,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:39,446 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 125 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:39,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 224 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39401 states. [2021-12-21 14:49:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39401 to 28185. [2021-12-21 14:49:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28185 states, 24009 states have (on average 1.2966804115123496) internal successors, (31132), 24250 states have internal predecessors, (31132), 2255 states have call successors, (2255), 1729 states have call predecessors, (2255), 1920 states have return successors, (3778), 2237 states have call predecessors, (3778), 2253 states have call successors, (3778) [2021-12-21 14:49:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28185 states to 28185 states and 37165 transitions. [2021-12-21 14:49:41,223 INFO L78 Accepts]: Start accepts. Automaton has 28185 states and 37165 transitions. Word has length 161 [2021-12-21 14:49:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:41,223 INFO L470 AbstractCegarLoop]: Abstraction has 28185 states and 37165 transitions. [2021-12-21 14:49:41,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 14:49:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 28185 states and 37165 transitions. [2021-12-21 14:49:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-21 14:49:41,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:41,258 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:41,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:41,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-21 14:49:41,458 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:41,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1993102869, now seen corresponding path program 1 times [2021-12-21 14:49:41,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:41,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41100338] [2021-12-21 14:49:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:41,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:49:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 14:49:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:49:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:49:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 14:49:41,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41100338] [2021-12-21 14:49:41,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41100338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613981703] [2021-12-21 14:49:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:41,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:41,575 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:41,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 14:49:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:41,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:49:41,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 14:49:41,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:41,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613981703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:41,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:41,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:49:41,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003491201] [2021-12-21 14:49:41,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:41,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:41,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:41,909 INFO L87 Difference]: Start difference. First operand 28185 states and 37165 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 14:49:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:44,348 INFO L93 Difference]: Finished difference Result 80093 states and 106937 transitions. [2021-12-21 14:49:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-21 14:49:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:44,515 INFO L225 Difference]: With dead ends: 80093 [2021-12-21 14:49:44,515 INFO L226 Difference]: Without dead ends: 51937 [2021-12-21 14:49:44,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:44,559 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 150 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:44,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 544 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51937 states. [2021-12-21 14:49:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51937 to 51933. [2021-12-21 14:49:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51933 states, 44065 states have (on average 1.2859185294451378) internal successors, (56664), 44546 states have internal predecessors, (56664), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-21 14:49:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51933 states to 51933 states and 69131 transitions. [2021-12-21 14:49:47,587 INFO L78 Accepts]: Start accepts. Automaton has 51933 states and 69131 transitions. Word has length 161 [2021-12-21 14:49:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:47,587 INFO L470 AbstractCegarLoop]: Abstraction has 51933 states and 69131 transitions. [2021-12-21 14:49:47,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 14:49:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 51933 states and 69131 transitions. [2021-12-21 14:49:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-21 14:49:47,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:47,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:47,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:47,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-21 14:49:47,844 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:47,845 INFO L85 PathProgramCache]: Analyzing trace with hash -129116033, now seen corresponding path program 1 times [2021-12-21 14:49:47,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:47,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079021287] [2021-12-21 14:49:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:47,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:49:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:49:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 14:49:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:49:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 14:49:47,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:47,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079021287] [2021-12-21 14:49:47,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079021287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:47,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376429237] [2021-12-21 14:49:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:47,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:47,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:47,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:47,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 14:49:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:48,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:49:48,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-21 14:49:48,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:48,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376429237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:48,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:48,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:49:48,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834535429] [2021-12-21 14:49:48,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:48,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:48,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:48,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:48,426 INFO L87 Difference]: Start difference. First operand 51933 states and 69131 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:49:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:50,944 INFO L93 Difference]: Finished difference Result 92895 states and 123871 transitions. [2021-12-21 14:49:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:50,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-21 14:49:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:51,167 INFO L225 Difference]: With dead ends: 92895 [2021-12-21 14:49:51,168 INFO L226 Difference]: Without dead ends: 52777 [2021-12-21 14:49:51,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:51,257 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 151 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:51,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 400 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52777 states. [2021-12-21 14:49:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52777 to 51933. [2021-12-21 14:49:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51933 states, 44065 states have (on average 1.2777487802110519) internal successors, (56304), 44546 states have internal predecessors, (56304), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-21 14:49:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51933 states to 51933 states and 68771 transitions. [2021-12-21 14:49:54,162 INFO L78 Accepts]: Start accepts. Automaton has 51933 states and 68771 transitions. Word has length 161 [2021-12-21 14:49:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:54,163 INFO L470 AbstractCegarLoop]: Abstraction has 51933 states and 68771 transitions. [2021-12-21 14:49:54,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:49:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 51933 states and 68771 transitions. [2021-12-21 14:49:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-21 14:49:54,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:54,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:54,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:54,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:54,427 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:54,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1698954724, now seen corresponding path program 1 times [2021-12-21 14:49:54,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:54,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863112176] [2021-12-21 14:49:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:54,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:49:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 14:49:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:49:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 14:49:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:49:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 14:49:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 14:49:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:49:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 14:49:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-21 14:49:54,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:54,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863112176] [2021-12-21 14:49:54,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863112176] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:54,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206949403] [2021-12-21 14:49:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:54,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:54,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:54,536 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:49:54,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 14:49:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:49:54,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 14:49:54,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:54,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206949403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:54,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:54,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:49:54,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76912329] [2021-12-21 14:49:54,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:54,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:54,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:54,839 INFO L87 Difference]: Start difference. First operand 51933 states and 68771 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)