./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 e19ca921 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-e19ca92 [2021-12-22 13:10:12,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:10:12,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:10:12,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:10:12,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:10:12,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:10:12,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:10:12,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:10:12,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:10:12,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:10:12,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:10:12,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:10:12,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:10:12,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:10:12,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:10:12,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:10:12,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:10:12,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:10:12,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:10:12,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:10:12,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:10:12,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:10:12,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:10:12,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:10:12,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:10:12,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:10:12,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:10:12,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:10:12,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:10:12,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:10:12,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:10:12,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:10:12,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:10:12,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:10:12,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:10:12,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:10:12,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:10:12,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:10:12,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:10:12,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:10:12,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:10:12,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:10:12,585 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:10:12,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:10:12,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:10:12,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:10:12,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:10:12,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:10:12,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:10:12,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:10:12,590 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:10:12,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:10:12,591 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:10:12,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:10:12,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:10:12,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:10:12,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:10:12,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:10:12,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:10:12,592 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:10:12,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:10:12,592 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:10:12,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:10:12,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:10:12,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:10:12,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:10:12,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:10:12,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:10:12,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:10:12,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:10:12,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:10:12,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:10:12,594 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:10:12,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:10:12,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:10:12,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:10:12,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb [2021-12-22 13:10:12,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:10:12,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:10:12,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:10:12,792 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:10:12,793 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:10:12,793 INFO L432 ainManager$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 [2021-12-22 13:10:12,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497344d74/6004c0ad172940bdb340ee2610b1a40b/FLAG1e68e965a [2021-12-22 13:10:13,220 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:10:13,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-22 13:10:13,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497344d74/6004c0ad172940bdb340ee2610b1a40b/FLAG1e68e965a [2021-12-22 13:10:13,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497344d74/6004c0ad172940bdb340ee2610b1a40b [2021-12-22 13:10:13,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:10:13,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:10:13,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:10:13,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:10:13,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:10:13,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f0ee2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13, skipping insertion in model container [2021-12-22 13:10:13,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:10:13,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:10:13,379 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] [2021-12-22 13:10:13,409 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] [2021-12-22 13:10:13,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:10:13,445 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:10:13,452 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] [2021-12-22 13:10:13,462 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] [2021-12-22 13:10:13,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:10:13,489 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:10:13,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13 WrapperNode [2021-12-22 13:10:13,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:10:13,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:10:13,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:10:13,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:10:13,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,520 INFO L137 Inliner]: procedures = 52, calls = 55, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 480 [2021-12-22 13:10:13,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:10:13,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:10:13,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:10:13,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:10:13,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:10:13,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:10:13,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:10:13,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:10:13,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (1/1) ... [2021-12-22 13:10:13,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:10:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:13,604 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) [2021-12-22 13:10:13,624 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 [2021-12-22 13:10:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:10:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:10:13,638 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:10:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-22 13:10:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-22 13:10:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:10:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:10:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:10:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:10:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:10:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:10:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:10:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:10:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:10:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:10:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:10:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:10:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:10:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:10:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:10:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:10:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:10:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:10:13,641 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:10:13,699 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:10:13,700 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:10:14,007 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:10:14,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:10:14,014 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-22 13:10:14,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:14 BoogieIcfgContainer [2021-12-22 13:10:14,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:10:14,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:10:14,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:10:14,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:10:14,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:10:13" (1/3) ... [2021-12-22 13:10:14,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1dccbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:14, skipping insertion in model container [2021-12-22 13:10:14,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:13" (2/3) ... [2021-12-22 13:10:14,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1dccbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:14, skipping insertion in model container [2021-12-22 13:10:14,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:14" (3/3) ... [2021-12-22 13:10:14,021 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-12-22 13:10:14,024 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:10:14,024 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:10:14,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:10:14,075 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 [2021-12-22 13:10:14,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:10:14,094 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) [2021-12-22 13:10:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 13:10:14,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:14,105 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] [2021-12-22 13:10:14,105 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2045589042, now seen corresponding path program 1 times [2021-12-22 13:10:14,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:14,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537265059] [2021-12-22 13:10:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:14,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:14,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:14,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 13:10:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:14,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:14,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537265059] [2021-12-22 13:10:14,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537265059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:14,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:14,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:14,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028692359] [2021-12-22 13:10:14,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:14,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:14,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:14,398 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) [2021-12-22 13:10:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:14,639 INFO L93 Difference]: Finished difference Result 478 states and 736 transitions. [2021-12-22 13:10:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:14,641 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 [2021-12-22 13:10:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:14,653 INFO L225 Difference]: With dead ends: 478 [2021-12-22 13:10:14,653 INFO L226 Difference]: Without dead ends: 271 [2021-12-22 13:10:14,657 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 [2021-12-22 13:10:14,659 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:14,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 551 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:10:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-22 13:10:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 265. [2021-12-22 13:10:14,700 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) [2021-12-22 13:10:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 381 transitions. [2021-12-22 13:10:14,704 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 381 transitions. Word has length 44 [2021-12-22 13:10:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:14,704 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 381 transitions. [2021-12-22 13:10:14,705 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) [2021-12-22 13:10:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 381 transitions. [2021-12-22 13:10:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:10:14,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:14,712 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] [2021-12-22 13:10:14,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:10:14,713 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:14,713 INFO L85 PathProgramCache]: Analyzing trace with hash 899257869, now seen corresponding path program 1 times [2021-12-22 13:10:14,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:14,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847855455] [2021-12-22 13:10:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:14,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:14,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:14,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:10:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:14,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:14,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847855455] [2021-12-22 13:10:14,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847855455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:14,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:14,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:14,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288601537] [2021-12-22 13:10:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:14,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:14,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:14,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:14,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:14,785 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) [2021-12-22 13:10:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:15,025 INFO L93 Difference]: Finished difference Result 513 states and 721 transitions. [2021-12-22 13:10:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:15,026 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 [2021-12-22 13:10:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:15,028 INFO L225 Difference]: With dead ends: 513 [2021-12-22 13:10:15,028 INFO L226 Difference]: Without dead ends: 389 [2021-12-22 13:10:15,029 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 [2021-12-22 13:10:15,030 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 [2021-12-22 13:10:15,030 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] [2021-12-22 13:10:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-22 13:10:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 332. [2021-12-22 13:10:15,049 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) [2021-12-22 13:10:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 471 transitions. [2021-12-22 13:10:15,050 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 471 transitions. Word has length 45 [2021-12-22 13:10:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:15,051 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 471 transitions. [2021-12-22 13:10:15,051 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) [2021-12-22 13:10:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 471 transitions. [2021-12-22 13:10:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:10:15,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:15,052 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] [2021-12-22 13:10:15,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:10:15,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash -385099592, now seen corresponding path program 1 times [2021-12-22 13:10:15,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:15,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158969780] [2021-12-22 13:10:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:15,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:10:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:15,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:15,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158969780] [2021-12-22 13:10:15,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158969780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:15,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:15,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:15,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337278466] [2021-12-22 13:10:15,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:15,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:15,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:15,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:15,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:15,134 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) [2021-12-22 13:10:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:15,243 INFO L93 Difference]: Finished difference Result 740 states and 1030 transitions. [2021-12-22 13:10:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:15,243 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 [2021-12-22 13:10:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:15,248 INFO L225 Difference]: With dead ends: 740 [2021-12-22 13:10:15,248 INFO L226 Difference]: Without dead ends: 549 [2021-12-22 13:10:15,253 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 [2021-12-22 13:10:15,256 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 [2021-12-22 13:10:15,257 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] [2021-12-22 13:10:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-12-22 13:10:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 497. [2021-12-22 13:10:15,293 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) [2021-12-22 13:10:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 689 transitions. [2021-12-22 13:10:15,296 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 689 transitions. Word has length 45 [2021-12-22 13:10:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:15,296 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 689 transitions. [2021-12-22 13:10:15,296 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) [2021-12-22 13:10:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 689 transitions. [2021-12-22 13:10:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 13:10:15,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:15,298 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] [2021-12-22 13:10:15,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:10:15,298 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:15,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash -748902494, now seen corresponding path program 1 times [2021-12-22 13:10:15,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:15,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146870170] [2021-12-22 13:10:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:15,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:10:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:10:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:10:15,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:15,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146870170] [2021-12-22 13:10:15,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146870170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:15,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:15,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:15,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168534492] [2021-12-22 13:10:15,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:15,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:15,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:15,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:15,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:15,368 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) [2021-12-22 13:10:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:15,527 INFO L93 Difference]: Finished difference Result 1081 states and 1474 transitions. [2021-12-22 13:10:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:15,527 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 [2021-12-22 13:10:15,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:15,530 INFO L225 Difference]: With dead ends: 1081 [2021-12-22 13:10:15,530 INFO L226 Difference]: Without dead ends: 725 [2021-12-22 13:10:15,531 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 [2021-12-22 13:10:15,532 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:15,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 735 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:10:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-22 13:10:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 687. [2021-12-22 13:10:15,552 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) [2021-12-22 13:10:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 927 transitions. [2021-12-22 13:10:15,554 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 927 transitions. Word has length 62 [2021-12-22 13:10:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:15,555 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 927 transitions. [2021-12-22 13:10:15,555 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) [2021-12-22 13:10:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 927 transitions. [2021-12-22 13:10:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 13:10:15,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:15,557 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] [2021-12-22 13:10:15,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:10:15,557 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash -80982464, now seen corresponding path program 1 times [2021-12-22 13:10:15,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:15,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588461989] [2021-12-22 13:10:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:15,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:10:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:10:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 13:10:15,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588461989] [2021-12-22 13:10:15,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588461989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:15,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:15,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:15,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310777218] [2021-12-22 13:10:15,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:15,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:15,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:15,609 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) [2021-12-22 13:10:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:15,700 INFO L93 Difference]: Finished difference Result 1340 states and 1780 transitions. [2021-12-22 13:10:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:15,701 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 [2021-12-22 13:10:15,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:15,704 INFO L225 Difference]: With dead ends: 1340 [2021-12-22 13:10:15,704 INFO L226 Difference]: Without dead ends: 886 [2021-12-22 13:10:15,705 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 [2021-12-22 13:10:15,706 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 353 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2021-12-22 13:10:15,706 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] [2021-12-22 13:10:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-22 13:10:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 831. [2021-12-22 13:10:15,729 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) [2021-12-22 13:10:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1100 transitions. [2021-12-22 13:10:15,731 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1100 transitions. Word has length 67 [2021-12-22 13:10:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:15,731 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1100 transitions. [2021-12-22 13:10:15,732 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) [2021-12-22 13:10:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1100 transitions. [2021-12-22 13:10:15,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:15,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:15,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:15,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:10:15,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash -294715005, now seen corresponding path program 1 times [2021-12-22 13:10:15,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:15,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850540232] [2021-12-22 13:10:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:15,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:15,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:15,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850540232] [2021-12-22 13:10:15,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850540232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:15,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:15,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:10:15,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834325686] [2021-12-22 13:10:15,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:15,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:10:15,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:10:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:10:15,820 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) [2021-12-22 13:10:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:16,380 INFO L93 Difference]: Finished difference Result 1141 states and 1571 transitions. [2021-12-22 13:10:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:10:16,381 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 [2021-12-22 13:10:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:16,385 INFO L225 Difference]: With dead ends: 1141 [2021-12-22 13:10:16,385 INFO L226 Difference]: Without dead ends: 1017 [2021-12-22 13:10:16,386 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 [2021-12-22 13:10:16,388 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:16,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 858 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:10:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-12-22 13:10:16,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 952. [2021-12-22 13:10:16,421 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) [2021-12-22 13:10:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1281 transitions. [2021-12-22 13:10:16,424 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1281 transitions. Word has length 69 [2021-12-22 13:10:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:16,425 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1281 transitions. [2021-12-22 13:10:16,425 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) [2021-12-22 13:10:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1281 transitions. [2021-12-22 13:10:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:16,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:16,427 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] [2021-12-22 13:10:16,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:10:16,427 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash -192000641, now seen corresponding path program 1 times [2021-12-22 13:10:16,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:16,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535352481] [2021-12-22 13:10:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:16,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:16,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:16,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:16,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:16,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:16,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:16,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:16,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535352481] [2021-12-22 13:10:16,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535352481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:16,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:16,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:16,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189875499] [2021-12-22 13:10:16,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:16,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:16,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:16,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:16,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:16,491 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) [2021-12-22 13:10:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:17,204 INFO L93 Difference]: Finished difference Result 1414 states and 1975 transitions. [2021-12-22 13:10:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:17,205 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 [2021-12-22 13:10:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:17,209 INFO L225 Difference]: With dead ends: 1414 [2021-12-22 13:10:17,209 INFO L226 Difference]: Without dead ends: 1169 [2021-12-22 13:10:17,210 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 [2021-12-22 13:10:17,210 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 554 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2021-12-22 13:10:17,210 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] [2021-12-22 13:10:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-12-22 13:10:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1066. [2021-12-22 13:10:17,240 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) [2021-12-22 13:10:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1447 transitions. [2021-12-22 13:10:17,243 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1447 transitions. Word has length 69 [2021-12-22 13:10:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:17,243 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1447 transitions. [2021-12-22 13:10:17,243 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) [2021-12-22 13:10:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1447 transitions. [2021-12-22 13:10:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:17,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:17,245 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] [2021-12-22 13:10:17,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:10:17,245 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:17,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:17,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1194784769, now seen corresponding path program 1 times [2021-12-22 13:10:17,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:17,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178840125] [2021-12-22 13:10:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:17,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:17,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:17,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:17,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:17,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:17,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178840125] [2021-12-22 13:10:17,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178840125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:17,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:17,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:17,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488804866] [2021-12-22 13:10:17,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:17,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:17,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:17,335 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) [2021-12-22 13:10:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:18,041 INFO L93 Difference]: Finished difference Result 1815 states and 2569 transitions. [2021-12-22 13:10:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:18,042 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 [2021-12-22 13:10:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:18,046 INFO L225 Difference]: With dead ends: 1815 [2021-12-22 13:10:18,046 INFO L226 Difference]: Without dead ends: 1456 [2021-12-22 13:10:18,048 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 [2021-12-22 13:10:18,048 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 585 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:18,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 1024 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:10:18,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-12-22 13:10:18,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1295. [2021-12-22 13:10:18,089 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) [2021-12-22 13:10:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1784 transitions. [2021-12-22 13:10:18,095 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1784 transitions. Word has length 69 [2021-12-22 13:10:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:18,097 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1784 transitions. [2021-12-22 13:10:18,097 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) [2021-12-22 13:10:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1784 transitions. [2021-12-22 13:10:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:18,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:18,101 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] [2021-12-22 13:10:18,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:10:18,101 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2070803775, now seen corresponding path program 1 times [2021-12-22 13:10:18,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:18,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32967396] [2021-12-22 13:10:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:18,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:18,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:18,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32967396] [2021-12-22 13:10:18,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32967396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:18,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:18,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:18,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981794131] [2021-12-22 13:10:18,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:18,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:18,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:18,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:18,173 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) [2021-12-22 13:10:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:18,548 INFO L93 Difference]: Finished difference Result 2032 states and 2897 transitions. [2021-12-22 13:10:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:10:18,549 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 [2021-12-22 13:10:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:18,554 INFO L225 Difference]: With dead ends: 2032 [2021-12-22 13:10:18,554 INFO L226 Difference]: Without dead ends: 1444 [2021-12-22 13:10:18,556 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 [2021-12-22 13:10:18,556 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 458 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-22 13:10:18,556 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] [2021-12-22 13:10:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-12-22 13:10:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1295. [2021-12-22 13:10:18,594 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) [2021-12-22 13:10:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1779 transitions. [2021-12-22 13:10:18,598 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1779 transitions. Word has length 69 [2021-12-22 13:10:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:18,598 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1779 transitions. [2021-12-22 13:10:18,598 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) [2021-12-22 13:10:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1779 transitions. [2021-12-22 13:10:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:18,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:18,600 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] [2021-12-22 13:10:18,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:10:18,601 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1780262847, now seen corresponding path program 1 times [2021-12-22 13:10:18,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:18,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238275118] [2021-12-22 13:10:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:18,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:18,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:18,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238275118] [2021-12-22 13:10:18,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238275118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:18,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:18,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:18,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428226616] [2021-12-22 13:10:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:18,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:18,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:18,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:18,671 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) [2021-12-22 13:10:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:19,455 INFO L93 Difference]: Finished difference Result 2685 states and 3828 transitions. [2021-12-22 13:10:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:10:19,455 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 [2021-12-22 13:10:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:19,462 INFO L225 Difference]: With dead ends: 2685 [2021-12-22 13:10:19,463 INFO L226 Difference]: Without dead ends: 2097 [2021-12-22 13:10:19,465 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 [2021-12-22 13:10:19,465 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 [2021-12-22 13:10:19,465 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] [2021-12-22 13:10:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-12-22 13:10:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1706. [2021-12-22 13:10:19,517 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) [2021-12-22 13:10:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2372 transitions. [2021-12-22 13:10:19,523 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2372 transitions. Word has length 69 [2021-12-22 13:10:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:19,523 INFO L470 AbstractCegarLoop]: Abstraction has 1706 states and 2372 transitions. [2021-12-22 13:10:19,524 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) [2021-12-22 13:10:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2372 transitions. [2021-12-22 13:10:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:19,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:19,526 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] [2021-12-22 13:10:19,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:10:19,526 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:19,526 INFO L85 PathProgramCache]: Analyzing trace with hash -241922817, now seen corresponding path program 1 times [2021-12-22 13:10:19,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:19,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836926775] [2021-12-22 13:10:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:19,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:19,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:19,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:19,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:19,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:19,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:19,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836926775] [2021-12-22 13:10:19,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836926775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:19,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:19,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:19,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104354429] [2021-12-22 13:10:19,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:19,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:19,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:19,588 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) [2021-12-22 13:10:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:20,285 INFO L93 Difference]: Finished difference Result 4076 states and 5836 transitions. [2021-12-22 13:10:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:10:20,286 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 [2021-12-22 13:10:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:20,298 INFO L225 Difference]: With dead ends: 4076 [2021-12-22 13:10:20,298 INFO L226 Difference]: Without dead ends: 3077 [2021-12-22 13:10:20,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:10:20,302 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 554 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:20,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1299 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:10:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-12-22 13:10:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2560. [2021-12-22 13:10:20,401 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) [2021-12-22 13:10:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3636 transitions. [2021-12-22 13:10:20,408 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3636 transitions. Word has length 69 [2021-12-22 13:10:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:20,409 INFO L470 AbstractCegarLoop]: Abstraction has 2560 states and 3636 transitions. [2021-12-22 13:10:20,409 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) [2021-12-22 13:10:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3636 transitions. [2021-12-22 13:10:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:20,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:20,411 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] [2021-12-22 13:10:20,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:10:20,412 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2024458369, now seen corresponding path program 1 times [2021-12-22 13:10:20,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:20,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99272832] [2021-12-22 13:10:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:20,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:20,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:20,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:20,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:20,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:20,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:20,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:20,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99272832] [2021-12-22 13:10:20,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99272832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:20,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:20,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:10:20,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526827657] [2021-12-22 13:10:20,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:20,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:10:20,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:10:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:10:20,476 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) [2021-12-22 13:10:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:21,106 INFO L93 Difference]: Finished difference Result 5934 states and 8606 transitions. [2021-12-22 13:10:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:10:21,106 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 [2021-12-22 13:10:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:21,120 INFO L225 Difference]: With dead ends: 5934 [2021-12-22 13:10:21,120 INFO L226 Difference]: Without dead ends: 4082 [2021-12-22 13:10:21,125 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 [2021-12-22 13:10:21,125 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 684 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2021-12-22 13:10:21,125 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] [2021-12-22 13:10:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-12-22 13:10:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3500. [2021-12-22 13:10:21,272 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) [2021-12-22 13:10:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 4945 transitions. [2021-12-22 13:10:21,283 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 4945 transitions. Word has length 69 [2021-12-22 13:10:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:21,283 INFO L470 AbstractCegarLoop]: Abstraction has 3500 states and 4945 transitions. [2021-12-22 13:10:21,283 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) [2021-12-22 13:10:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 4945 transitions. [2021-12-22 13:10:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:10:21,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:21,286 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] [2021-12-22 13:10:21,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:10:21,286 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:21,287 INFO L85 PathProgramCache]: Analyzing trace with hash 688510564, now seen corresponding path program 1 times [2021-12-22 13:10:21,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:21,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711469009] [2021-12-22 13:10:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:21,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:21,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:21,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:10:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:10:21,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:21,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711469009] [2021-12-22 13:10:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711469009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513912958] [2021-12-22 13:10:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:21,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:21,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:21,343 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) [2021-12-22 13:10:21,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:10:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:21,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:10:21,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:10:21,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:21,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513912958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:21,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:21,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 13:10:21,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307274439] [2021-12-22 13:10:21,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:21,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:21,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:21,602 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) [2021-12-22 13:10:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:21,694 INFO L93 Difference]: Finished difference Result 4043 states and 5668 transitions. [2021-12-22 13:10:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:21,695 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 [2021-12-22 13:10:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:21,706 INFO L225 Difference]: With dead ends: 4043 [2021-12-22 13:10:21,707 INFO L226 Difference]: Without dead ends: 3498 [2021-12-22 13:10:21,710 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 [2021-12-22 13:10:21,710 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 [2021-12-22 13:10:21,710 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] [2021-12-22 13:10:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-12-22 13:10:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3454. [2021-12-22 13:10:21,855 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) [2021-12-22 13:10:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 4870 transitions. [2021-12-22 13:10:21,863 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 4870 transitions. Word has length 68 [2021-12-22 13:10:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:21,863 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 4870 transitions. [2021-12-22 13:10:21,864 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) [2021-12-22 13:10:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 4870 transitions. [2021-12-22 13:10:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:10:21,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:21,866 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] [2021-12-22 13:10:21,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:22,081 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 [2021-12-22 13:10:22,082 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1426484957, now seen corresponding path program 1 times [2021-12-22 13:10:22,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:22,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19515132] [2021-12-22 13:10:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:22,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:22,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:22,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:10:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:10:22,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19515132] [2021-12-22 13:10:22,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19515132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994632118] [2021-12-22 13:10:22,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:22,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:22,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:22,135 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) [2021-12-22 13:10:22,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:10:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:10:22,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:22,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:10:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:10:22,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994632118] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:22,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:10:22,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-22 13:10:22,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382694118] [2021-12-22 13:10:22,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:22,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:22,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:22,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:22,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:22,407 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) [2021-12-22 13:10:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:22,562 INFO L93 Difference]: Finished difference Result 3506 states and 4932 transitions. [2021-12-22 13:10:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:10:22,562 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 [2021-12-22 13:10:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:22,573 INFO L225 Difference]: With dead ends: 3506 [2021-12-22 13:10:22,574 INFO L226 Difference]: Without dead ends: 3503 [2021-12-22 13:10:22,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:10:22,576 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 493 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-22 13:10:22,576 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] [2021-12-22 13:10:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2021-12-22 13:10:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3453. [2021-12-22 13:10:22,689 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) [2021-12-22 13:10:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 4867 transitions. [2021-12-22 13:10:22,697 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 4867 transitions. Word has length 68 [2021-12-22 13:10:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:22,697 INFO L470 AbstractCegarLoop]: Abstraction has 3453 states and 4867 transitions. [2021-12-22 13:10:22,698 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) [2021-12-22 13:10:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 4867 transitions. [2021-12-22 13:10:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:22,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:22,700 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] [2021-12-22 13:10:22,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:22,912 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 [2021-12-22 13:10:22,913 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1272047869, now seen corresponding path program 1 times [2021-12-22 13:10:22,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:22,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774830978] [2021-12-22 13:10:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:22,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:22,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:22,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:22,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:10:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:10:22,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:22,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774830978] [2021-12-22 13:10:22,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774830978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:22,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948077162] [2021-12-22 13:10:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:22,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:22,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:22,999 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) [2021-12-22 13:10:22,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:10:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:23,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:10:23,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:10:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:10:23,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948077162] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:10:23,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:10:23,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-22 13:10:23,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131332767] [2021-12-22 13:10:23,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:10:23,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:10:23,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:10:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:10:23,412 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) [2021-12-22 13:10:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:24,264 INFO L93 Difference]: Finished difference Result 4963 states and 6805 transitions. [2021-12-22 13:10:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 13:10:24,265 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 [2021-12-22 13:10:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:24,295 INFO L225 Difference]: With dead ends: 4963 [2021-12-22 13:10:24,299 INFO L226 Difference]: Without dead ends: 4467 [2021-12-22 13:10:24,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 13:10:24,320 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 664 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:24,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 2611 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:10:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2021-12-22 13:10:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3832. [2021-12-22 13:10:24,471 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) [2021-12-22 13:10:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5333 transitions. [2021-12-22 13:10:24,523 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5333 transitions. Word has length 69 [2021-12-22 13:10:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:24,524 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 5333 transitions. [2021-12-22 13:10:24,524 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) [2021-12-22 13:10:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5333 transitions. [2021-12-22 13:10:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-22 13:10:24,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:24,528 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] [2021-12-22 13:10:24,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:24,739 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 [2021-12-22 13:10:24,739 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:24,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:24,740 INFO L85 PathProgramCache]: Analyzing trace with hash -290000336, now seen corresponding path program 1 times [2021-12-22 13:10:24,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:24,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441323167] [2021-12-22 13:10:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:24,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:24,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:24,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:24,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:10:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:24,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:10:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 13:10:24,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441323167] [2021-12-22 13:10:24,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441323167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19608715] [2021-12-22 13:10:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:24,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:24,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:24,802 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) [2021-12-22 13:10:24,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:10:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:24,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:10:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:10:24,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:24,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19608715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:24,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:24,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 13:10:24,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907777263] [2021-12-22 13:10:24,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:24,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:24,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:24,954 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) [2021-12-22 13:10:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:25,058 INFO L93 Difference]: Finished difference Result 4523 states and 6208 transitions. [2021-12-22 13:10:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:25,059 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 [2021-12-22 13:10:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:25,083 INFO L225 Difference]: With dead ends: 4523 [2021-12-22 13:10:25,084 INFO L226 Difference]: Without dead ends: 3754 [2021-12-22 13:10:25,086 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 [2021-12-22 13:10:25,087 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 [2021-12-22 13:10:25,087 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] [2021-12-22 13:10:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-12-22 13:10:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3745. [2021-12-22 13:10:25,249 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) [2021-12-22 13:10:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 5217 transitions. [2021-12-22 13:10:25,256 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 5217 transitions. Word has length 88 [2021-12-22 13:10:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:25,256 INFO L470 AbstractCegarLoop]: Abstraction has 3745 states and 5217 transitions. [2021-12-22 13:10:25,256 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) [2021-12-22 13:10:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 5217 transitions. [2021-12-22 13:10:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 13:10:25,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:25,262 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] [2021-12-22 13:10:25,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:25,471 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 [2021-12-22 13:10:25,471 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:25,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1575033221, now seen corresponding path program 1 times [2021-12-22 13:10:25,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:25,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394262332] [2021-12-22 13:10:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:25,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:25,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:25,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:25,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:10:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:25,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 13:10:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:25,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:10:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 13:10:25,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:25,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394262332] [2021-12-22 13:10:25,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394262332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:25,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078177842] [2021-12-22 13:10:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:25,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:25,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:25,527 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) [2021-12-22 13:10:25,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:10:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:25,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:10:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:10:25,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:25,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078177842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:25,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:25,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 13:10:25,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000145817] [2021-12-22 13:10:25,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:25,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:25,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:25,709 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) [2021-12-22 13:10:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:25,795 INFO L93 Difference]: Finished difference Result 4122 states and 5678 transitions. [2021-12-22 13:10:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:25,796 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 [2021-12-22 13:10:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:25,802 INFO L225 Difference]: With dead ends: 4122 [2021-12-22 13:10:25,803 INFO L226 Difference]: Without dead ends: 2804 [2021-12-22 13:10:25,805 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 [2021-12-22 13:10:25,805 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 [2021-12-22 13:10:25,805 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] [2021-12-22 13:10:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-12-22 13:10:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2804. [2021-12-22 13:10:25,918 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) [2021-12-22 13:10:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4043 transitions. [2021-12-22 13:10:25,925 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4043 transitions. Word has length 103 [2021-12-22 13:10:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:25,925 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 4043 transitions. [2021-12-22 13:10:25,925 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) [2021-12-22 13:10:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4043 transitions. [2021-12-22 13:10:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 13:10:25,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:25,930 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] [2021-12-22 13:10:25,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:26,148 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 [2021-12-22 13:10:26,148 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1375832156, now seen corresponding path program 1 times [2021-12-22 13:10:26,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:26,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036179468] [2021-12-22 13:10:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:26,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:10:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:10:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 13:10:26,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:26,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036179468] [2021-12-22 13:10:26,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036179468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:26,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254802423] [2021-12-22 13:10:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:26,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:26,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:26,272 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) [2021-12-22 13:10:26,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:10:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:10:26,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 13:10:26,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:26,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254802423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:26,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:26,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 13:10:26,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92190586] [2021-12-22 13:10:26,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:26,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:26,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:26,513 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) [2021-12-22 13:10:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:26,709 INFO L93 Difference]: Finished difference Result 8245 states and 11965 transitions. [2021-12-22 13:10:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:26,709 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 [2021-12-22 13:10:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:26,724 INFO L225 Difference]: With dead ends: 8245 [2021-12-22 13:10:26,724 INFO L226 Difference]: Without dead ends: 5453 [2021-12-22 13:10:26,731 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 [2021-12-22 13:10:26,732 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 [2021-12-22 13:10:26,732 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] [2021-12-22 13:10:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-12-22 13:10:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 5397. [2021-12-22 13:10:26,944 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) [2021-12-22 13:10:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5397 states to 5397 states and 7750 transitions. [2021-12-22 13:10:26,957 INFO L78 Accepts]: Start accepts. Automaton has 5397 states and 7750 transitions. Word has length 111 [2021-12-22 13:10:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:26,958 INFO L470 AbstractCegarLoop]: Abstraction has 5397 states and 7750 transitions. [2021-12-22 13:10:26,958 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) [2021-12-22 13:10:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5397 states and 7750 transitions. [2021-12-22 13:10:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 13:10:26,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:26,966 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] [2021-12-22 13:10:26,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:27,183 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 [2021-12-22 13:10:27,183 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash 483275324, now seen corresponding path program 1 times [2021-12-22 13:10:27,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:27,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751634717] [2021-12-22 13:10:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:27,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:10:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:10:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 13:10:27,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:27,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751634717] [2021-12-22 13:10:27,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751634717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:27,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027232756] [2021-12-22 13:10:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:27,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:27,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:27,276 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) [2021-12-22 13:10:27,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:10:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:27,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:10:27,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:10:27,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:27,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027232756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:27,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:27,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:10:27,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590970378] [2021-12-22 13:10:27,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:27,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:27,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:27,484 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) [2021-12-22 13:10:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:27,800 INFO L93 Difference]: Finished difference Result 15785 states and 22914 transitions. [2021-12-22 13:10:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:27,800 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 [2021-12-22 13:10:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:27,832 INFO L225 Difference]: With dead ends: 15785 [2021-12-22 13:10:27,832 INFO L226 Difference]: Without dead ends: 10401 [2021-12-22 13:10:27,847 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 [2021-12-22 13:10:27,848 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 [2021-12-22 13:10:27,848 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] [2021-12-22 13:10:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2021-12-22 13:10:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 10401. [2021-12-22 13:10:28,228 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) [2021-12-22 13:10:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10401 states to 10401 states and 14939 transitions. [2021-12-22 13:10:28,255 INFO L78 Accepts]: Start accepts. Automaton has 10401 states and 14939 transitions. Word has length 111 [2021-12-22 13:10:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:28,255 INFO L470 AbstractCegarLoop]: Abstraction has 10401 states and 14939 transitions. [2021-12-22 13:10:28,255 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) [2021-12-22 13:10:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 10401 states and 14939 transitions. [2021-12-22 13:10:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-22 13:10:28,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:28,283 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] [2021-12-22 13:10:28,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:28,518 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 [2021-12-22 13:10:28,518 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash 142639029, now seen corresponding path program 1 times [2021-12-22 13:10:28,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:28,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922677864] [2021-12-22 13:10:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:28,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:10:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 13:10:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-22 13:10:28,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922677864] [2021-12-22 13:10:28,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922677864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438775843] [2021-12-22 13:10:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:28,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:28,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:28,662 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) [2021-12-22 13:10:28,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:10:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:28,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:10:28,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:10:28,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:28,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438775843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:28,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:28,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 13:10:28,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953601397] [2021-12-22 13:10:28,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:28,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:28,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:28,959 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) [2021-12-22 13:10:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:29,653 INFO L93 Difference]: Finished difference Result 30737 states and 44476 transitions. [2021-12-22 13:10:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:29,654 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 [2021-12-22 13:10:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:29,720 INFO L225 Difference]: With dead ends: 30737 [2021-12-22 13:10:29,720 INFO L226 Difference]: Without dead ends: 20353 [2021-12-22 13:10:29,750 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 [2021-12-22 13:10:29,751 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 [2021-12-22 13:10:29,751 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] [2021-12-22 13:10:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20353 states. [2021-12-22 13:10:30,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20353 to 20141. [2021-12-22 13:10:30,518 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) [2021-12-22 13:10:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20141 states to 20141 states and 28765 transitions. [2021-12-22 13:10:30,569 INFO L78 Accepts]: Start accepts. Automaton has 20141 states and 28765 transitions. Word has length 143 [2021-12-22 13:10:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:30,570 INFO L470 AbstractCegarLoop]: Abstraction has 20141 states and 28765 transitions. [2021-12-22 13:10:30,570 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) [2021-12-22 13:10:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 20141 states and 28765 transitions. [2021-12-22 13:10:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 13:10:30,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:30,617 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] [2021-12-22 13:10:30,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:30,832 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 [2021-12-22 13:10:30,833 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:30,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:30,833 INFO L85 PathProgramCache]: Analyzing trace with hash 28732006, now seen corresponding path program 1 times [2021-12-22 13:10:30,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:30,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879445583] [2021-12-22 13:10:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:30,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:10:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:10:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 13:10:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 13:10:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 13:10:30,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:30,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879445583] [2021-12-22 13:10:30,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879445583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:30,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366291797] [2021-12-22 13:10:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:30,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:30,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:30,925 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) [2021-12-22 13:10:30,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:10:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:31,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:10:31,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:10:31,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:31,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366291797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:31,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:31,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:10:31,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298105021] [2021-12-22 13:10:31,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:31,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:31,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:31,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:31,259 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) [2021-12-22 13:10:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:32,366 INFO L93 Difference]: Finished difference Result 42657 states and 61614 transitions. [2021-12-22 13:10:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:32,373 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 [2021-12-22 13:10:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:32,438 INFO L225 Difference]: With dead ends: 42657 [2021-12-22 13:10:32,438 INFO L226 Difference]: Without dead ends: 22535 [2021-12-22 13:10:32,476 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 [2021-12-22 13:10:32,477 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 [2021-12-22 13:10:32,477 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] [2021-12-22 13:10:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22535 states. [2021-12-22 13:10:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22535 to 22535. [2021-12-22 13:10:33,467 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) [2021-12-22 13:10:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22535 states to 22535 states and 31237 transitions. [2021-12-22 13:10:33,521 INFO L78 Accepts]: Start accepts. Automaton has 22535 states and 31237 transitions. Word has length 160 [2021-12-22 13:10:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:33,521 INFO L470 AbstractCegarLoop]: Abstraction has 22535 states and 31237 transitions. [2021-12-22 13:10:33,522 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) [2021-12-22 13:10:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 22535 states and 31237 transitions. [2021-12-22 13:10:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 13:10:33,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:33,559 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] [2021-12-22 13:10:33,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:33,776 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 [2021-12-22 13:10:33,777 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:33,777 INFO L85 PathProgramCache]: Analyzing trace with hash -124896125, now seen corresponding path program 1 times [2021-12-22 13:10:33,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:33,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309691607] [2021-12-22 13:10:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:33,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 13:10:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:10:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 13:10:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-22 13:10:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 13:10:33,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:33,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309691607] [2021-12-22 13:10:33,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309691607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:33,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936548570] [2021-12-22 13:10:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:33,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:33,872 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) [2021-12-22 13:10:33,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:10:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:10:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 13:10:34,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:34,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936548570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:34,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:34,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:10:34,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994418122] [2021-12-22 13:10:34,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:34,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:34,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:34,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:34,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:34,181 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) [2021-12-22 13:10:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:35,049 INFO L93 Difference]: Finished difference Result 39568 states and 54775 transitions. [2021-12-22 13:10:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:35,049 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 [2021-12-22 13:10:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:35,125 INFO L225 Difference]: With dead ends: 39568 [2021-12-22 13:10:35,125 INFO L226 Difference]: Without dead ends: 24075 [2021-12-22 13:10:35,159 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 [2021-12-22 13:10:35,161 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 [2021-12-22 13:10:35,161 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] [2021-12-22 13:10:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24075 states. [2021-12-22 13:10:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24075 to 23935. [2021-12-22 13:10:36,131 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) [2021-12-22 13:10:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23935 states to 23935 states and 32637 transitions. [2021-12-22 13:10:36,184 INFO L78 Accepts]: Start accepts. Automaton has 23935 states and 32637 transitions. Word has length 160 [2021-12-22 13:10:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:36,184 INFO L470 AbstractCegarLoop]: Abstraction has 23935 states and 32637 transitions. [2021-12-22 13:10:36,184 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) [2021-12-22 13:10:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 23935 states and 32637 transitions. [2021-12-22 13:10:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 13:10:36,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:36,223 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] [2021-12-22 13:10:36,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-22 13:10:36,440 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 [2021-12-22 13:10:36,440 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:36,441 INFO L85 PathProgramCache]: Analyzing trace with hash -402645848, now seen corresponding path program 1 times [2021-12-22 13:10:36,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:36,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874955901] [2021-12-22 13:10:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:36,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:10:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 13:10:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:10:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 13:10:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 13:10:36,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:36,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874955901] [2021-12-22 13:10:36,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874955901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:36,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326793793] [2021-12-22 13:10:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:36,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:36,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:36,548 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) [2021-12-22 13:10:36,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:10:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:10:36,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 13:10:36,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:36,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326793793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:36,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:36,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:10:36,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239707377] [2021-12-22 13:10:36,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:36,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:36,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:36,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:36,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:36,833 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) [2021-12-22 13:10:38,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:38,861 INFO L93 Difference]: Finished difference Result 70545 states and 97151 transitions. [2021-12-22 13:10:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:38,862 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 [2021-12-22 13:10:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:38,982 INFO L225 Difference]: With dead ends: 70545 [2021-12-22 13:10:38,982 INFO L226 Difference]: Without dead ends: 46629 [2021-12-22 13:10:39,023 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 [2021-12-22 13:10:39,024 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 [2021-12-22 13:10:39,024 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] [2021-12-22 13:10:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46629 states. [2021-12-22 13:10:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46629 to 46585. [2021-12-22 13:10:41,080 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) [2021-12-22 13:10:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 63909 transitions. [2021-12-22 13:10:41,217 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 63909 transitions. Word has length 161 [2021-12-22 13:10:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:41,218 INFO L470 AbstractCegarLoop]: Abstraction has 46585 states and 63909 transitions. [2021-12-22 13:10:41,218 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) [2021-12-22 13:10:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 63909 transitions. [2021-12-22 13:10:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 13:10:41,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:41,303 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] [2021-12-22 13:10:41,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:41,515 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 [2021-12-22 13:10:41,516 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:41,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1546394152, now seen corresponding path program 1 times [2021-12-22 13:10:41,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:41,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349164077] [2021-12-22 13:10:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:41,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:10:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 13:10:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:10:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 13:10:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 13:10:41,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:41,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349164077] [2021-12-22 13:10:41,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349164077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:41,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282262108] [2021-12-22 13:10:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:41,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:41,593 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) [2021-12-22 13:10:41,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:10:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:10:41,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 13:10:41,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:41,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282262108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:41,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:41,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:10:41,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605520523] [2021-12-22 13:10:41,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:41,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:41,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:41,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:41,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:41,915 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) [2021-12-22 13:10:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:44,076 INFO L93 Difference]: Finished difference Result 76949 states and 107564 transitions. [2021-12-22 13:10:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:44,077 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 [2021-12-22 13:10:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:44,228 INFO L225 Difference]: With dead ends: 76949 [2021-12-22 13:10:44,228 INFO L226 Difference]: Without dead ends: 39401 [2021-12-22 13:10:44,291 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 [2021-12-22 13:10:44,291 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 [2021-12-22 13:10:44,291 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] [2021-12-22 13:10:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39401 states. [2021-12-22 13:10:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39401 to 28185. [2021-12-22 13:10:45,991 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) [2021-12-22 13:10:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28185 states to 28185 states and 37165 transitions. [2021-12-22 13:10:46,060 INFO L78 Accepts]: Start accepts. Automaton has 28185 states and 37165 transitions. Word has length 161 [2021-12-22 13:10:46,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:46,060 INFO L470 AbstractCegarLoop]: Abstraction has 28185 states and 37165 transitions. [2021-12-22 13:10:46,060 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) [2021-12-22 13:10:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 28185 states and 37165 transitions. [2021-12-22 13:10:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 13:10:46,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:46,096 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] [2021-12-22 13:10:46,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-22 13:10:46,310 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 [2021-12-22 13:10:46,310 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1993102869, now seen corresponding path program 1 times [2021-12-22 13:10:46,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:46,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986460430] [2021-12-22 13:10:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:46,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:10:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 13:10:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:10:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 13:10:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 13:10:46,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:46,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986460430] [2021-12-22 13:10:46,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986460430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:46,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741049780] [2021-12-22 13:10:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:46,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:46,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:46,388 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) [2021-12-22 13:10:46,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:10:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:10:46,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 13:10:46,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:46,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741049780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:46,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:46,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:10:46,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081026934] [2021-12-22 13:10:46,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:46,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:46,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:46,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:46,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:46,649 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) [2021-12-22 13:10:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:48,911 INFO L93 Difference]: Finished difference Result 80093 states and 106937 transitions. [2021-12-22 13:10:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:48,921 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 [2021-12-22 13:10:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:49,069 INFO L225 Difference]: With dead ends: 80093 [2021-12-22 13:10:49,069 INFO L226 Difference]: Without dead ends: 51937 [2021-12-22 13:10:49,113 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 [2021-12-22 13:10:49,114 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 [2021-12-22 13:10:49,114 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] [2021-12-22 13:10:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51937 states. [2021-12-22 13:10:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51937 to 51933. [2021-12-22 13:10:51,670 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) [2021-12-22 13:10:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51933 states to 51933 states and 69131 transitions. [2021-12-22 13:10:51,829 INFO L78 Accepts]: Start accepts. Automaton has 51933 states and 69131 transitions. Word has length 161 [2021-12-22 13:10:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:51,830 INFO L470 AbstractCegarLoop]: Abstraction has 51933 states and 69131 transitions. [2021-12-22 13:10:51,830 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) [2021-12-22 13:10:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 51933 states and 69131 transitions. [2021-12-22 13:10:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 13:10:51,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:51,897 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] [2021-12-22 13:10:51,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:52,114 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 [2021-12-22 13:10:52,122 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:52,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:52,123 INFO L85 PathProgramCache]: Analyzing trace with hash -129116033, now seen corresponding path program 1 times [2021-12-22 13:10:52,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:52,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533001378] [2021-12-22 13:10:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:52,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:10:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:10:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:10:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 13:10:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 13:10:52,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533001378] [2021-12-22 13:10:52,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533001378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:52,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324868508] [2021-12-22 13:10:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:52,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:52,198 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) [2021-12-22 13:10:52,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:10:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:52,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:10:52,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 13:10:52,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:52,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324868508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:52,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:52,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:10:52,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117362565] [2021-12-22 13:10:52,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:52,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:52,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:52,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:52,509 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) [2021-12-22 13:10:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:55,046 INFO L93 Difference]: Finished difference Result 92895 states and 123871 transitions. [2021-12-22 13:10:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:55,046 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 [2021-12-22 13:10:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:55,219 INFO L225 Difference]: With dead ends: 92895 [2021-12-22 13:10:55,219 INFO L226 Difference]: Without dead ends: 52777 [2021-12-22 13:10:55,292 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 [2021-12-22 13:10:55,293 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 [2021-12-22 13:10:55,293 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] [2021-12-22 13:10:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52777 states. [2021-12-22 13:10:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52777 to 51933. [2021-12-22 13:10:58,086 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) [2021-12-22 13:10:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51933 states to 51933 states and 68771 transitions. [2021-12-22 13:10:58,215 INFO L78 Accepts]: Start accepts. Automaton has 51933 states and 68771 transitions. Word has length 161 [2021-12-22 13:10:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:58,215 INFO L470 AbstractCegarLoop]: Abstraction has 51933 states and 68771 transitions. [2021-12-22 13:10:58,216 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) [2021-12-22 13:10:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 51933 states and 68771 transitions. [2021-12-22 13:10:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 13:10:58,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:58,273 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] [2021-12-22 13:10:58,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-22 13:10:58,492 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 [2021-12-22 13:10:58,493 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:58,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1698954724, now seen corresponding path program 1 times [2021-12-22 13:10:58,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:58,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377698822] [2021-12-22 13:10:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:58,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:10:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:10:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:10:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:10:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:10:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:10:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 13:10:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:10:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 13:10:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 13:10:58,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:58,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377698822] [2021-12-22 13:10:58,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377698822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:58,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918473991] [2021-12-22 13:10:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:58,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:58,594 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) [2021-12-22 13:10:58,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 13:10:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:58,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:10:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 13:10:58,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:58,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918473991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:58,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:58,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 13:10:58,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675922612] [2021-12-22 13:10:58,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:58,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:58,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:58,885 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) [2021-12-22 13:11:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:01,608 INFO L93 Difference]: Finished difference Result 92605 states and 122981 transitions. [2021-12-22 13:11:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:11:01,609 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 161 [2021-12-22 13:11:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:01,747 INFO L225 Difference]: With dead ends: 92605 [2021-12-22 13:11:01,747 INFO L226 Difference]: Without dead ends: 53329 [2021-12-22 13:11:01,800 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 [2021-12-22 13:11:01,800 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 150 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 416 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 [2021-12-22 13:11:01,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 416 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:11:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53329 states. [2021-12-22 13:11:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53329 to 51813. [2021-12-22 13:11:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51813 states, 43945 states have (on average 1.2703151666856298) internal successors, (55824), 44426 states have internal predecessors, (55824), 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) [2021-12-22 13:11:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51813 states to 51813 states and 68291 transitions. [2021-12-22 13:11:04,422 INFO L78 Accepts]: Start accepts. Automaton has 51813 states and 68291 transitions. Word has length 161 [2021-12-22 13:11:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:04,422 INFO L470 AbstractCegarLoop]: Abstraction has 51813 states and 68291 transitions. [2021-12-22 13:11:04,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-12-22 13:11:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 51813 states and 68291 transitions. [2021-12-22 13:11:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 13:11:04,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:04,475 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] [2021-12-22 13:11:04,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 13:11:04,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-22 13:11:04,692 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash 590012799, now seen corresponding path program 1 times [2021-12-22 13:11:04,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:04,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249686269] [2021-12-22 13:11:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:04,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:11:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:11:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 13:11:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 13:11:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 13:11:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 13:11:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:11:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-22 13:11:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 13:11:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 13:11:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-22 13:11:04,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:04,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249686269] [2021-12-22 13:11:04,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249686269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:04,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:04,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:11:04,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045270337] [2021-12-22 13:11:04,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:04,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:11:04,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:11:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:11:04,752 INFO L87 Difference]: Start difference. First operand 51813 states and 68291 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:11:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:07,413 INFO L93 Difference]: Finished difference Result 101193 states and 132294 transitions. [2021-12-22 13:11:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:11:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2021-12-22 13:11:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:07,541 INFO L225 Difference]: With dead ends: 101193 [2021-12-22 13:11:07,541 INFO L226 Difference]: Without dead ends: 49405 [2021-12-22 13:11:07,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:11:07,614 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 296 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:07,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 346 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:11:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49405 states.