./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_3.cil+token_ring.14.cil.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 5519dfe0be74dafaa274c71ed936f0e7133f32a3aa7e45c032b5d5b905afa484 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:21:32,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:21:32,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:21:32,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:21:32,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:21:32,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:21:32,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:21:32,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:21:32,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:21:32,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:21:32,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:21:32,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:21:32,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:21:32,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:21:32,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:21:32,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:21:32,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:21:32,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:21:32,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:21:32,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:21:32,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:21:32,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:21:32,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:21:32,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:21:32,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:21:32,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:21:32,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:21:32,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:21:32,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:21:32,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:21:32,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:21:32,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:21:32,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:21:32,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:21:32,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:21:32,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:21:32,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:21:32,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:21:32,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:21:32,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:21:32,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:21:32,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:21:32,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:21:32,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:21:32,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:21:32,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:21:32,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:21:32,592 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:21:32,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:21:32,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:21:32,593 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:21:32,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:21:32,594 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:21:32,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:21:32,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:21:32,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:21:32,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:21:32,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:21:32,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:21:32,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:21:32,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:21:32,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:21:32,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:21:32,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:21:32,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:21:32,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:21:32,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:21:32,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:21:32,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:21:32,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:21:32,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:21:32,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:21:32,599 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:21:32,599 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:21:32,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:21:32,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:21:32,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5519dfe0be74dafaa274c71ed936f0e7133f32a3aa7e45c032b5d5b905afa484 [2021-12-14 16:21:32,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:21:32,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:21:32,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:21:32,837 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:21:32,838 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:21:32,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.14.cil.c [2021-12-14 16:21:32,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1663e03/77a5920247714ffe9199219f87a3eac7/FLAGc2ead9027 [2021-12-14 16:21:33,375 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:21:33,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.14.cil.c [2021-12-14 16:21:33,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1663e03/77a5920247714ffe9199219f87a3eac7/FLAGc2ead9027 [2021-12-14 16:21:33,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc1663e03/77a5920247714ffe9199219f87a3eac7 [2021-12-14 16:21:33,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:21:33,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:21:33,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:21:33,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:21:33,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:21:33,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:21:33" (1/1) ... [2021-12-14 16:21:33,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448a2a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:33, skipping insertion in model container [2021-12-14 16:21:33,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:21:33" (1/1) ... [2021-12-14 16:21:33,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:21:33,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:21:34,098 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_3.cil+token_ring.14.cil.c[911,924] [2021-12-14 16:21:34,142 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_3.cil+token_ring.14.cil.c[8416,8429] [2021-12-14 16:21:34,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:21:34,289 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:21:34,300 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_3.cil+token_ring.14.cil.c[911,924] [2021-12-14 16:21:34,328 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_3.cil+token_ring.14.cil.c[8416,8429] [2021-12-14 16:21:34,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:21:34,415 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:21:34,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34 WrapperNode [2021-12-14 16:21:34,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:21:34,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:21:34,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:21:34,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:21:34,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,495 INFO L137 Inliner]: procedures = 79, calls = 98, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1081 [2021-12-14 16:21:34,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:21:34,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:21:34,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:21:34,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:21:34,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:21:34,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:21:34,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:21:34,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:21:34,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (1/1) ... [2021-12-14 16:21:34,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:21:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:21:34,648 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) [2021-12-14 16:21:34,675 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 [2021-12-14 16:21:34,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:21:34,696 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:21:34,696 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:21:34,696 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-14 16:21:34,698 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-14 16:21:34,698 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:21:34,698 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:21:34,698 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:21:34,698 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:21:34,698 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-14 16:21:34,699 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-14 16:21:34,699 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:21:34,699 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:21:34,699 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:21:34,699 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:21:34,699 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-14 16:21:34,699 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-14 16:21:34,700 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-14 16:21:34,700 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-14 16:21:34,700 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-14 16:21:34,700 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-14 16:21:34,700 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:21:34,700 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:21:34,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:21:34,700 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:21:34,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:21:34,701 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-14 16:21:34,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-14 16:21:34,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:21:34,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:21:34,701 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:21:34,701 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:21:34,702 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-14 16:21:34,702 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-14 16:21:34,862 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:21:34,874 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:21:35,495 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-14 16:21:35,495 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-14 16:21:35,569 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:21:35,588 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:21:35,589 INFO L301 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-14 16:21:35,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:21:35 BoogieIcfgContainer [2021-12-14 16:21:35,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:21:35,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:21:35,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:21:35,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:21:35,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:21:33" (1/3) ... [2021-12-14 16:21:35,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56738a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:21:35, skipping insertion in model container [2021-12-14 16:21:35,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:34" (2/3) ... [2021-12-14 16:21:35,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56738a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:21:35, skipping insertion in model container [2021-12-14 16:21:35,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:21:35" (3/3) ... [2021-12-14 16:21:35,603 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.14.cil.c [2021-12-14 16:21:35,607 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:21:35,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:21:35,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:21:35,674 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 [2021-12-14 16:21:35,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:21:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 505 states, 443 states have (on average 1.6410835214446953) internal successors, (727), 451 states have internal predecessors, (727), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-14 16:21:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:21:35,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:35,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:35,730 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:35,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:35,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1125668429, now seen corresponding path program 1 times [2021-12-14 16:21:35,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:35,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901951560] [2021-12-14 16:21:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:35,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:21:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:21:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:36,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:36,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901951560] [2021-12-14 16:21:36,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901951560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:36,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:36,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:21:36,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555826261] [2021-12-14 16:21:36,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:36,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:21:36,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:21:36,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:21:36,169 INFO L87 Difference]: Start difference. First operand has 505 states, 443 states have (on average 1.6410835214446953) internal successors, (727), 451 states have internal predecessors, (727), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:36,974 INFO L93 Difference]: Finished difference Result 999 states and 1610 transitions. [2021-12-14 16:21:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:21:36,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:21:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:37,003 INFO L225 Difference]: With dead ends: 999 [2021-12-14 16:21:37,004 INFO L226 Difference]: Without dead ends: 512 [2021-12-14 16:21:37,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:37,014 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 788 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:37,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 2164 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:21:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-12-14 16:21:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 494. [2021-12-14 16:21:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 435 states have (on average 1.554022988505747) internal successors, (676), 440 states have internal predecessors, (676), 44 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-14 16:21:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 760 transitions. [2021-12-14 16:21:37,086 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 760 transitions. Word has length 65 [2021-12-14 16:21:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:37,087 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 760 transitions. [2021-12-14 16:21:37,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 760 transitions. [2021-12-14 16:21:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:21:37,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:37,091 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] [2021-12-14 16:21:37,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:21:37,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash -261116981, now seen corresponding path program 1 times [2021-12-14 16:21:37,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:37,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463513178] [2021-12-14 16:21:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:37,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:21:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:21:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:37,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:37,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463513178] [2021-12-14 16:21:37,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463513178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:37,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:37,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:21:37,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396891206] [2021-12-14 16:21:37,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:37,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:21:37,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:37,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:21:37,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:21:37,262 INFO L87 Difference]: Start difference. First operand 494 states and 760 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:38,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:38,281 INFO L93 Difference]: Finished difference Result 749 states and 1129 transitions. [2021-12-14 16:21:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:38,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:21:38,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:38,294 INFO L225 Difference]: With dead ends: 749 [2021-12-14 16:21:38,294 INFO L226 Difference]: Without dead ends: 645 [2021-12-14 16:21:38,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:21:38,296 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 1281 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:38,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1288 Valid, 2583 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:21:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-12-14 16:21:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 606. [2021-12-14 16:21:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 525 states have (on average 1.5276190476190477) internal successors, (802), 532 states have internal predecessors, (802), 57 states have call successors, (57), 22 states have call predecessors, (57), 22 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2021-12-14 16:21:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 917 transitions. [2021-12-14 16:21:38,396 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 917 transitions. Word has length 65 [2021-12-14 16:21:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:38,396 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 917 transitions. [2021-12-14 16:21:38,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 917 transitions. [2021-12-14 16:21:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:21:38,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:38,400 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] [2021-12-14 16:21:38,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:21:38,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:38,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:38,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1417771659, now seen corresponding path program 1 times [2021-12-14 16:21:38,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:38,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116085433] [2021-12-14 16:21:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:38,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:21:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:21:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:38,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116085433] [2021-12-14 16:21:38,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116085433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:38,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:38,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:21:38,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972387465] [2021-12-14 16:21:38,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:38,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:21:38,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:21:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:21:38,512 INFO L87 Difference]: Start difference. First operand 606 states and 917 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:39,660 INFO L93 Difference]: Finished difference Result 1003 states and 1482 transitions. [2021-12-14 16:21:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:21:39,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:21:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:39,670 INFO L225 Difference]: With dead ends: 1003 [2021-12-14 16:21:39,670 INFO L226 Difference]: Without dead ends: 794 [2021-12-14 16:21:39,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:21:39,678 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 1858 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 2367 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:39,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 2367 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:21:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-12-14 16:21:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 718. [2021-12-14 16:21:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 615 states have (on average 1.5073170731707317) internal successors, (927), 624 states have internal predecessors, (927), 70 states have call successors, (70), 29 states have call predecessors, (70), 31 states have return successors, (79), 68 states have call predecessors, (79), 66 states have call successors, (79) [2021-12-14 16:21:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1076 transitions. [2021-12-14 16:21:39,759 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1076 transitions. Word has length 65 [2021-12-14 16:21:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:39,759 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1076 transitions. [2021-12-14 16:21:39,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1076 transitions. [2021-12-14 16:21:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:21:39,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:39,763 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] [2021-12-14 16:21:39,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:21:39,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash -610814451, now seen corresponding path program 1 times [2021-12-14 16:21:39,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:39,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222593747] [2021-12-14 16:21:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:39,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:21:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:21:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:39,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:39,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222593747] [2021-12-14 16:21:39,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222593747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:39,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:39,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:21:39,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185615591] [2021-12-14 16:21:39,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:39,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:21:39,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:21:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:21:39,908 INFO L87 Difference]: Start difference. First operand 718 states and 1076 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 16:21:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:41,832 INFO L93 Difference]: Finished difference Result 2264 states and 3273 transitions. [2021-12-14 16:21:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:21:41,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-14 16:21:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:41,842 INFO L225 Difference]: With dead ends: 2264 [2021-12-14 16:21:41,842 INFO L226 Difference]: Without dead ends: 1931 [2021-12-14 16:21:41,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:21:41,846 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 4369 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4391 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 780 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:41,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4391 Valid, 2859 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [780 Valid, 1690 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:21:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-12-14 16:21:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1771. [2021-12-14 16:21:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1463 states have (on average 1.4169514695830485) internal successors, (2073), 1487 states have internal predecessors, (2073), 180 states have call successors, (180), 112 states have call predecessors, (180), 126 states have return successors, (212), 174 states have call predecessors, (212), 176 states have call successors, (212) [2021-12-14 16:21:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2465 transitions. [2021-12-14 16:21:41,944 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2465 transitions. Word has length 65 [2021-12-14 16:21:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:41,944 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 2465 transitions. [2021-12-14 16:21:41,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 16:21:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2465 transitions. [2021-12-14 16:21:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:21:41,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:41,947 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] [2021-12-14 16:21:41,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:21:41,948 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2038334069, now seen corresponding path program 1 times [2021-12-14 16:21:41,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:41,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673381936] [2021-12-14 16:21:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:41,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:41,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:41,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:41,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 16:21:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:21:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:42,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:42,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673381936] [2021-12-14 16:21:42,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673381936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:42,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:42,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:21:42,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142109776] [2021-12-14 16:21:42,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:42,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:21:42,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:21:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:42,056 INFO L87 Difference]: Start difference. First operand 1771 states and 2465 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:43,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:43,099 INFO L93 Difference]: Finished difference Result 3299 states and 4544 transitions. [2021-12-14 16:21:43,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:21:43,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-14 16:21:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:43,109 INFO L225 Difference]: With dead ends: 3299 [2021-12-14 16:21:43,109 INFO L226 Difference]: Without dead ends: 1919 [2021-12-14 16:21:43,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:43,116 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 996 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 3168 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:43,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 3168 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:21:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-12-14 16:21:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1811. [2021-12-14 16:21:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1495 states have (on average 1.4040133779264214) internal successors, (2099), 1519 states have internal predecessors, (2099), 180 states have call successors, (180), 112 states have call predecessors, (180), 134 states have return successors, (220), 182 states have call predecessors, (220), 176 states have call successors, (220) [2021-12-14 16:21:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2499 transitions. [2021-12-14 16:21:43,214 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2499 transitions. Word has length 66 [2021-12-14 16:21:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:43,215 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2499 transitions. [2021-12-14 16:21:43,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2499 transitions. [2021-12-14 16:21:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:21:43,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:43,217 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] [2021-12-14 16:21:43,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:21:43,218 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:43,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1227273929, now seen corresponding path program 1 times [2021-12-14 16:21:43,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:43,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358551212] [2021-12-14 16:21:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:43,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:43,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:43,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:43,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:43,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:43,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:43,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 16:21:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:43,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:21:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:43,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358551212] [2021-12-14 16:21:43,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358551212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:43,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:43,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:21:43,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912695919] [2021-12-14 16:21:43,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:43,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:21:43,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:43,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:21:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:21:43,343 INFO L87 Difference]: Start difference. First operand 1811 states and 2499 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:21:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:45,253 INFO L93 Difference]: Finished difference Result 5383 states and 7373 transitions. [2021-12-14 16:21:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:21:45,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-14 16:21:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:45,263 INFO L225 Difference]: With dead ends: 5383 [2021-12-14 16:21:45,263 INFO L226 Difference]: Without dead ends: 2202 [2021-12-14 16:21:45,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:21:45,270 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 3939 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3961 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:45,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3961 Valid, 3336 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:21:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-12-14 16:21:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2022. [2021-12-14 16:21:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 1634 states have (on average 1.3616891064871481) internal successors, (2225), 1660 states have internal predecessors, (2225), 220 states have call successors, (220), 140 states have call predecessors, (220), 166 states have return successors, (266), 224 states have call predecessors, (266), 216 states have call successors, (266) [2021-12-14 16:21:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 2711 transitions. [2021-12-14 16:21:45,359 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 2711 transitions. Word has length 66 [2021-12-14 16:21:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 2711 transitions. [2021-12-14 16:21:45,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:21:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 2711 transitions. [2021-12-14 16:21:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:21:45,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:45,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:45,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:21:45,363 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:45,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1550661326, now seen corresponding path program 1 times [2021-12-14 16:21:45,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:45,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876829627] [2021-12-14 16:21:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:45,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:45,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:45,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:45,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:45,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:45,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:45,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:45,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:45,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:21:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:21:45,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:45,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876829627] [2021-12-14 16:21:45,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876829627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:45,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:45,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:21:45,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826852347] [2021-12-14 16:21:45,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:45,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:21:45,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:45,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:21:45,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:45,499 INFO L87 Difference]: Start difference. First operand 2022 states and 2711 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:46,614 INFO L93 Difference]: Finished difference Result 3847 states and 5113 transitions. [2021-12-14 16:21:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:21:46,615 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-14 16:21:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:46,627 INFO L225 Difference]: With dead ends: 3847 [2021-12-14 16:21:46,627 INFO L226 Difference]: Without dead ends: 2216 [2021-12-14 16:21:46,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:21:46,634 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 661 mSDsluCounter, 2706 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:46,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 3439 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:21:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-12-14 16:21:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2082. [2021-12-14 16:21:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 1682 states have (on average 1.3478002378121283) internal successors, (2267), 1708 states have internal predecessors, (2267), 220 states have call successors, (220), 140 states have call predecessors, (220), 178 states have return successors, (278), 236 states have call predecessors, (278), 216 states have call successors, (278) [2021-12-14 16:21:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2765 transitions. [2021-12-14 16:21:46,734 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2765 transitions. Word has length 91 [2021-12-14 16:21:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:46,735 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 2765 transitions. [2021-12-14 16:21:46,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:46,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2765 transitions. [2021-12-14 16:21:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:21:46,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:46,741 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:46,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:21:46,741 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:46,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:46,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1106760652, now seen corresponding path program 1 times [2021-12-14 16:21:46,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:46,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638800172] [2021-12-14 16:21:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:46,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:46,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:46,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:46,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:46,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:46,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:46,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:46,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:21:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:21:46,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:46,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638800172] [2021-12-14 16:21:46,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638800172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:46,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:46,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:46,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481531269] [2021-12-14 16:21:46,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:46,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:46,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:46,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:46,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:46,831 INFO L87 Difference]: Start difference. First operand 2082 states and 2765 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:21:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:47,176 INFO L93 Difference]: Finished difference Result 3882 states and 5120 transitions. [2021-12-14 16:21:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:21:47,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-14 16:21:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:47,187 INFO L225 Difference]: With dead ends: 3882 [2021-12-14 16:21:47,187 INFO L226 Difference]: Without dead ends: 2192 [2021-12-14 16:21:47,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:21:47,191 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 1655 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:47,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1688 Valid, 1709 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:21:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-12-14 16:21:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2082. [2021-12-14 16:21:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 1682 states have (on average 1.3228299643281807) internal successors, (2225), 1708 states have internal predecessors, (2225), 220 states have call successors, (220), 140 states have call predecessors, (220), 178 states have return successors, (278), 236 states have call predecessors, (278), 216 states have call successors, (278) [2021-12-14 16:21:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2723 transitions. [2021-12-14 16:21:47,284 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2723 transitions. Word has length 91 [2021-12-14 16:21:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:47,285 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 2723 transitions. [2021-12-14 16:21:47,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:21:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2723 transitions. [2021-12-14 16:21:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 16:21:47,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:47,288 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-14 16:21:47,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:21:47,289 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash -721573211, now seen corresponding path program 1 times [2021-12-14 16:21:47,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:47,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14348833] [2021-12-14 16:21:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:47,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 16:21:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:21:47,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:47,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14348833] [2021-12-14 16:21:47,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14348833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:47,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:47,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:21:47,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681133546] [2021-12-14 16:21:47,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:47,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:21:47,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:21:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:47,396 INFO L87 Difference]: Start difference. First operand 2082 states and 2723 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:21:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:48,806 INFO L93 Difference]: Finished difference Result 4891 states and 6302 transitions. [2021-12-14 16:21:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 16:21:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-14 16:21:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:48,819 INFO L225 Difference]: With dead ends: 4891 [2021-12-14 16:21:48,819 INFO L226 Difference]: Without dead ends: 2896 [2021-12-14 16:21:48,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-14 16:21:48,824 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 2107 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:48,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 2705 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:21:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2021-12-14 16:21:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 2719. [2021-12-14 16:21:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2160 states have (on average 1.2819444444444446) internal successors, (2769), 2195 states have internal predecessors, (2769), 299 states have call successors, (299), 189 states have call predecessors, (299), 258 states have return successors, (414), 337 states have call predecessors, (414), 295 states have call successors, (414) [2021-12-14 16:21:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 3482 transitions. [2021-12-14 16:21:48,970 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 3482 transitions. Word has length 92 [2021-12-14 16:21:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:48,971 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 3482 transitions. [2021-12-14 16:21:48,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:21:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 3482 transitions. [2021-12-14 16:21:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 16:21:48,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:48,974 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:48,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:21:48,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2110123202, now seen corresponding path program 1 times [2021-12-14 16:21:48,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:48,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192919299] [2021-12-14 16:21:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:48,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 16:21:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:21:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 16:21:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 16:21:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:21:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:21:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-14 16:21:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-14 16:21:49,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:49,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192919299] [2021-12-14 16:21:49,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192919299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:21:49,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097985971] [2021-12-14 16:21:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:49,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:21:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:21:49,115 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) [2021-12-14 16:21:49,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:21:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:21:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:21:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 16:21:49,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:21:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097985971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:49,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:21:49,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-14 16:21:49,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774110952] [2021-12-14 16:21:49,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:49,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:21:49,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:49,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:21:49,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:49,596 INFO L87 Difference]: Start difference. First operand 2719 states and 3482 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:21:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:49,734 INFO L93 Difference]: Finished difference Result 7014 states and 8763 transitions. [2021-12-14 16:21:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:21:49,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2021-12-14 16:21:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:49,753 INFO L225 Difference]: With dead ends: 7014 [2021-12-14 16:21:49,754 INFO L226 Difference]: Without dead ends: 4841 [2021-12-14 16:21:49,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:49,760 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 61 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:49,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1525 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:21:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2021-12-14 16:21:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 4796. [2021-12-14 16:21:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4796 states, 3773 states have (on average 1.2467532467532467) internal successors, (4704), 3836 states have internal predecessors, (4704), 532 states have call successors, (532), 370 states have call predecessors, (532), 489 states have return successors, (718), 592 states have call predecessors, (718), 528 states have call successors, (718) [2021-12-14 16:21:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4796 states to 4796 states and 5954 transitions. [2021-12-14 16:21:49,962 INFO L78 Accepts]: Start accepts. Automaton has 4796 states and 5954 transitions. Word has length 163 [2021-12-14 16:21:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:49,964 INFO L470 AbstractCegarLoop]: Abstraction has 4796 states and 5954 transitions. [2021-12-14 16:21:49,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:21:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4796 states and 5954 transitions. [2021-12-14 16:21:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:21:49,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:49,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:49,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 16:21:50,191 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,SelfDestructingSolverStorable9 [2021-12-14 16:21:50,191 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:50,192 INFO L85 PathProgramCache]: Analyzing trace with hash -174258653, now seen corresponding path program 1 times [2021-12-14 16:21:50,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:50,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477976488] [2021-12-14 16:21:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:50,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:21:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:21:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:21:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:21:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:50,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:50,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477976488] [2021-12-14 16:21:50,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477976488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:50,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:50,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:21:50,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550902671] [2021-12-14 16:21:50,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:50,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:21:50,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:21:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:21:50,328 INFO L87 Difference]: Start difference. First operand 4796 states and 5954 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:52,201 INFO L93 Difference]: Finished difference Result 5314 states and 6794 transitions. [2021-12-14 16:21:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:52,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:21:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:52,219 INFO L225 Difference]: With dead ends: 5314 [2021-12-14 16:21:52,220 INFO L226 Difference]: Without dead ends: 4938 [2021-12-14 16:21:52,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:52,222 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 1150 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:52,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 1434 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:21:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-12-14 16:21:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4796. [2021-12-14 16:21:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4796 states, 3773 states have (on average 1.2464882056718791) internal successors, (4703), 3836 states have internal predecessors, (4703), 532 states have call successors, (532), 370 states have call predecessors, (532), 489 states have return successors, (718), 592 states have call predecessors, (718), 528 states have call successors, (718) [2021-12-14 16:21:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4796 states to 4796 states and 5953 transitions. [2021-12-14 16:21:52,554 INFO L78 Accepts]: Start accepts. Automaton has 4796 states and 5953 transitions. Word has length 179 [2021-12-14 16:21:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:52,554 INFO L470 AbstractCegarLoop]: Abstraction has 4796 states and 5953 transitions. [2021-12-14 16:21:52,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4796 states and 5953 transitions. [2021-12-14 16:21:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:21:52,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:52,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:52,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:21:52,560 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash -822851423, now seen corresponding path program 1 times [2021-12-14 16:21:52,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:52,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905333037] [2021-12-14 16:21:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:52,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:21:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:21:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:21:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:21:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:52,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905333037] [2021-12-14 16:21:52,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905333037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:52,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:52,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:21:52,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096161412] [2021-12-14 16:21:52,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:52,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:21:52,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:21:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:21:52,709 INFO L87 Difference]: Start difference. First operand 4796 states and 5953 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:54,506 INFO L93 Difference]: Finished difference Result 5306 states and 6777 transitions. [2021-12-14 16:21:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:54,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:21:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:54,526 INFO L225 Difference]: With dead ends: 5306 [2021-12-14 16:21:54,526 INFO L226 Difference]: Without dead ends: 4938 [2021-12-14 16:21:54,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:54,531 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 1141 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:54,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 1432 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 16:21:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-12-14 16:21:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4796. [2021-12-14 16:21:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4796 states, 3773 states have (on average 1.2462231645905115) internal successors, (4702), 3836 states have internal predecessors, (4702), 532 states have call successors, (532), 370 states have call predecessors, (532), 489 states have return successors, (718), 592 states have call predecessors, (718), 528 states have call successors, (718) [2021-12-14 16:21:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4796 states to 4796 states and 5952 transitions. [2021-12-14 16:21:54,844 INFO L78 Accepts]: Start accepts. Automaton has 4796 states and 5952 transitions. Word has length 179 [2021-12-14 16:21:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:54,844 INFO L470 AbstractCegarLoop]: Abstraction has 4796 states and 5952 transitions. [2021-12-14 16:21:54,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 4796 states and 5952 transitions. [2021-12-14 16:21:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:21:54,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:54,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:54,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:21:54,849 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1321408225, now seen corresponding path program 1 times [2021-12-14 16:21:54,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:54,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381786713] [2021-12-14 16:21:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:54,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:54,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:21:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:54,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:21:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:54,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:21:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:54,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:21:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:54,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381786713] [2021-12-14 16:21:54,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381786713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:54,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:54,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:21:54,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638469325] [2021-12-14 16:21:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:55,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:21:55,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:21:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:21:55,001 INFO L87 Difference]: Start difference. First operand 4796 states and 5952 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:57,853 INFO L93 Difference]: Finished difference Result 5822 states and 7615 transitions. [2021-12-14 16:21:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:21:57,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:21:57,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:57,876 INFO L225 Difference]: With dead ends: 5822 [2021-12-14 16:21:57,876 INFO L226 Difference]: Without dead ends: 5460 [2021-12-14 16:21:57,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:57,879 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 1805 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1836 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:57,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1836 Valid, 2050 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 16:21:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5460 states. [2021-12-14 16:21:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5460 to 5175. [2021-12-14 16:21:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5175 states, 4124 states have (on average 1.2764306498545102) internal successors, (5264), 4188 states have internal predecessors, (5264), 553 states have call successors, (553), 376 states have call predecessors, (553), 496 states have return successors, (742), 613 states have call predecessors, (742), 549 states have call successors, (742) [2021-12-14 16:21:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5175 states to 5175 states and 6559 transitions. [2021-12-14 16:21:58,271 INFO L78 Accepts]: Start accepts. Automaton has 5175 states and 6559 transitions. Word has length 179 [2021-12-14 16:21:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:58,271 INFO L470 AbstractCegarLoop]: Abstraction has 5175 states and 6559 transitions. [2021-12-14 16:21:58,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 5175 states and 6559 transitions. [2021-12-14 16:21:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:21:58,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:58,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:58,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:21:58,276 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:58,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1587819291, now seen corresponding path program 1 times [2021-12-14 16:21:58,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:58,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156587181] [2021-12-14 16:21:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:58,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:21:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:21:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:21:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:21:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:58,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:58,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156587181] [2021-12-14 16:21:58,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156587181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:58,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:58,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:58,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770088783] [2021-12-14 16:21:58,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:58,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:58,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:58,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:58,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:58,447 INFO L87 Difference]: Start difference. First operand 5175 states and 6559 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:00,211 INFO L93 Difference]: Finished difference Result 6221 states and 8264 transitions. [2021-12-14 16:22:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:22:00,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:22:00,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:00,228 INFO L225 Difference]: With dead ends: 6221 [2021-12-14 16:22:00,228 INFO L226 Difference]: Without dead ends: 5480 [2021-12-14 16:22:00,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:22:00,232 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1587 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:00,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1619 Valid, 1719 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:22:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2021-12-14 16:22:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 5175. [2021-12-14 16:22:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5175 states, 4124 states have (on average 1.275945683802134) internal successors, (5262), 4188 states have internal predecessors, (5262), 553 states have call successors, (553), 376 states have call predecessors, (553), 496 states have return successors, (742), 613 states have call predecessors, (742), 549 states have call successors, (742) [2021-12-14 16:22:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5175 states to 5175 states and 6557 transitions. [2021-12-14 16:22:00,541 INFO L78 Accepts]: Start accepts. Automaton has 5175 states and 6557 transitions. Word has length 179 [2021-12-14 16:22:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:00,542 INFO L470 AbstractCegarLoop]: Abstraction has 5175 states and 6557 transitions. [2021-12-14 16:22:00,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:00,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5175 states and 6557 transitions. [2021-12-14 16:22:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:22:00,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:00,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:00,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:22:00,546 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash 976550233, now seen corresponding path program 1 times [2021-12-14 16:22:00,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:00,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590630272] [2021-12-14 16:22:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:00,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:00,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:22:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:00,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:22:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:00,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:22:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:00,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:22:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:00,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:00,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590630272] [2021-12-14 16:22:00,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590630272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:00,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:00,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:00,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477531901] [2021-12-14 16:22:00,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:00,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:00,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:00,694 INFO L87 Difference]: Start difference. First operand 5175 states and 6557 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:02,823 INFO L93 Difference]: Finished difference Result 6219 states and 8254 transitions. [2021-12-14 16:22:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:22:02,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:22:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:02,837 INFO L225 Difference]: With dead ends: 6219 [2021-12-14 16:22:02,837 INFO L226 Difference]: Without dead ends: 5478 [2021-12-14 16:22:02,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:22:02,841 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 1363 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:02,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1395 Valid, 1973 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 16:22:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-12-14 16:22:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5175. [2021-12-14 16:22:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5175 states, 4124 states have (on average 1.2754607177497574) internal successors, (5260), 4188 states have internal predecessors, (5260), 553 states have call successors, (553), 376 states have call predecessors, (553), 496 states have return successors, (742), 613 states have call predecessors, (742), 549 states have call successors, (742) [2021-12-14 16:22:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5175 states to 5175 states and 6555 transitions. [2021-12-14 16:22:03,200 INFO L78 Accepts]: Start accepts. Automaton has 5175 states and 6555 transitions. Word has length 179 [2021-12-14 16:22:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:03,201 INFO L470 AbstractCegarLoop]: Abstraction has 5175 states and 6555 transitions. [2021-12-14 16:22:03,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5175 states and 6555 transitions. [2021-12-14 16:22:03,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:22:03,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:03,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:03,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:22:03,205 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:03,206 INFO L85 PathProgramCache]: Analyzing trace with hash -428641445, now seen corresponding path program 1 times [2021-12-14 16:22:03,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:03,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587694029] [2021-12-14 16:22:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:03,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:03,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:03,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:22:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:03,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:22:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:03,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:22:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:03,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:22:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:03,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:03,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587694029] [2021-12-14 16:22:03,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587694029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:03,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:03,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:03,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058898172] [2021-12-14 16:22:03,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:03,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:03,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:03,347 INFO L87 Difference]: Start difference. First operand 5175 states and 6555 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:05,159 INFO L93 Difference]: Finished difference Result 6217 states and 8244 transitions. [2021-12-14 16:22:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:22:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:22:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:05,172 INFO L225 Difference]: With dead ends: 6217 [2021-12-14 16:22:05,172 INFO L226 Difference]: Without dead ends: 5476 [2021-12-14 16:22:05,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:22:05,176 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 1361 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:05,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1393 Valid, 1969 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:22:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-12-14 16:22:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 5175. [2021-12-14 16:22:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5175 states, 4124 states have (on average 1.2749757516973812) internal successors, (5258), 4188 states have internal predecessors, (5258), 553 states have call successors, (553), 376 states have call predecessors, (553), 496 states have return successors, (742), 613 states have call predecessors, (742), 549 states have call successors, (742) [2021-12-14 16:22:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5175 states to 5175 states and 6553 transitions. [2021-12-14 16:22:05,541 INFO L78 Accepts]: Start accepts. Automaton has 5175 states and 6553 transitions. Word has length 179 [2021-12-14 16:22:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:05,542 INFO L470 AbstractCegarLoop]: Abstraction has 5175 states and 6553 transitions. [2021-12-14 16:22:05,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:05,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5175 states and 6553 transitions. [2021-12-14 16:22:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:22:05,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:05,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:05,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:22:05,546 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:05,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:05,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1465692441, now seen corresponding path program 1 times [2021-12-14 16:22:05,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:05,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46908731] [2021-12-14 16:22:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:05,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:05,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:05,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:22:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:05,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:22:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:05,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:22:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:05,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:22:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:05,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:05,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46908731] [2021-12-14 16:22:05,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46908731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:05,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:05,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:05,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482569187] [2021-12-14 16:22:05,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:05,681 INFO L87 Difference]: Start difference. First operand 5175 states and 6553 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:09,102 INFO L93 Difference]: Finished difference Result 6737 states and 9068 transitions. [2021-12-14 16:22:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:22:09,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:22:09,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:09,122 INFO L225 Difference]: With dead ends: 6737 [2021-12-14 16:22:09,123 INFO L226 Difference]: Without dead ends: 5996 [2021-12-14 16:22:09,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:22:09,128 INFO L933 BasicCegarLoop]: 1131 mSDtfsCounter, 1818 mSDsluCounter, 2223 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 3354 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:09,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1849 Valid, 3354 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-14 16:22:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2021-12-14 16:22:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5531. [2021-12-14 16:22:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 4452 states have (on average 1.2955974842767295) internal successors, (5768), 4517 states have internal predecessors, (5768), 574 states have call successors, (574), 382 states have call predecessors, (574), 503 states have return successors, (765), 635 states have call predecessors, (765), 570 states have call successors, (765) [2021-12-14 16:22:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 7107 transitions. [2021-12-14 16:22:09,532 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 7107 transitions. Word has length 179 [2021-12-14 16:22:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:09,532 INFO L470 AbstractCegarLoop]: Abstraction has 5531 states and 7107 transitions. [2021-12-14 16:22:09,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 7107 transitions. [2021-12-14 16:22:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:22:09,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:09,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:09,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:22:09,537 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1382693989, now seen corresponding path program 1 times [2021-12-14 16:22:09,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:09,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261139496] [2021-12-14 16:22:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:09,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:22:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:22:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:22:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:22:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:09,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:09,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261139496] [2021-12-14 16:22:09,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261139496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:09,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:09,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:09,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439103064] [2021-12-14 16:22:09,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:09,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:09,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:09,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:09,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:09,687 INFO L87 Difference]: Start difference. First operand 5531 states and 7107 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:11,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:11,552 INFO L93 Difference]: Finished difference Result 7103 states and 9651 transitions. [2021-12-14 16:22:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:22:11,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:22:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:11,565 INFO L225 Difference]: With dead ends: 7103 [2021-12-14 16:22:11,565 INFO L226 Difference]: Without dead ends: 6006 [2021-12-14 16:22:11,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:22:11,570 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 1360 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:11,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1392 Valid, 1960 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:22:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2021-12-14 16:22:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 5531. [2021-12-14 16:22:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 4452 states have (on average 1.29492362982929) internal successors, (5765), 4517 states have internal predecessors, (5765), 574 states have call successors, (574), 382 states have call predecessors, (574), 503 states have return successors, (765), 635 states have call predecessors, (765), 570 states have call successors, (765) [2021-12-14 16:22:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 7104 transitions. [2021-12-14 16:22:11,880 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 7104 transitions. Word has length 179 [2021-12-14 16:22:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:11,880 INFO L470 AbstractCegarLoop]: Abstraction has 5531 states and 7104 transitions. [2021-12-14 16:22:11,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 7104 transitions. [2021-12-14 16:22:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:22:11,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:11,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:11,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:22:11,885 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1989105881, now seen corresponding path program 1 times [2021-12-14 16:22:11,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:11,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891502027] [2021-12-14 16:22:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:11,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:11,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:11,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:22:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:12,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:22:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:12,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:22:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:12,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:22:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:12,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891502027] [2021-12-14 16:22:12,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891502027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:12,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:12,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:12,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692946211] [2021-12-14 16:22:12,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:12,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:12,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:12,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:12,030 INFO L87 Difference]: Start difference. First operand 5531 states and 7104 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:15,184 INFO L93 Difference]: Finished difference Result 8083 states and 11190 transitions. [2021-12-14 16:22:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:22:15,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:22:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:15,205 INFO L225 Difference]: With dead ends: 8083 [2021-12-14 16:22:15,205 INFO L226 Difference]: Without dead ends: 6986 [2021-12-14 16:22:15,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:22:15,213 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 1906 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 2856 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1937 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:15,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1937 Valid, 2406 Invalid, 3030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2856 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 16:22:15,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6986 states. [2021-12-14 16:22:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6986 to 6249. [2021-12-14 16:22:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6249 states, 5114 states have (on average 1.328118889323426) internal successors, (6792), 5181 states have internal predecessors, (6792), 616 states have call successors, (616), 394 states have call predecessors, (616), 517 states have return successors, (815), 679 states have call predecessors, (815), 612 states have call successors, (815) [2021-12-14 16:22:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6249 states to 6249 states and 8223 transitions. [2021-12-14 16:22:15,736 INFO L78 Accepts]: Start accepts. Automaton has 6249 states and 8223 transitions. Word has length 179 [2021-12-14 16:22:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:15,737 INFO L470 AbstractCegarLoop]: Abstraction has 6249 states and 8223 transitions. [2021-12-14 16:22:15,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 6249 states and 8223 transitions. [2021-12-14 16:22:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:22:15,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:15,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:15,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:22:15,742 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1919999013, now seen corresponding path program 1 times [2021-12-14 16:22:15,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:15,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938757407] [2021-12-14 16:22:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:15,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:15,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:22:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:15,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:22:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:15,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:22:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:15,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:22:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:15,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:15,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938757407] [2021-12-14 16:22:15,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938757407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:15,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:15,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:15,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892934858] [2021-12-14 16:22:15,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:15,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:15,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:15,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:15,870 INFO L87 Difference]: Start difference. First operand 6249 states and 8223 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:17,736 INFO L93 Difference]: Finished difference Result 8785 states and 12294 transitions. [2021-12-14 16:22:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:22:17,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:22:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:17,756 INFO L225 Difference]: With dead ends: 8785 [2021-12-14 16:22:17,756 INFO L226 Difference]: Without dead ends: 6970 [2021-12-14 16:22:17,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:22:17,764 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1361 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:17,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1393 Valid, 1951 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:22:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6970 states. [2021-12-14 16:22:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6970 to 6249. [2021-12-14 16:22:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6249 states, 5114 states have (on average 1.3271411810715683) internal successors, (6787), 5181 states have internal predecessors, (6787), 616 states have call successors, (616), 394 states have call predecessors, (616), 517 states have return successors, (815), 679 states have call predecessors, (815), 612 states have call successors, (815) [2021-12-14 16:22:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6249 states to 6249 states and 8218 transitions. [2021-12-14 16:22:18,206 INFO L78 Accepts]: Start accepts. Automaton has 6249 states and 8218 transitions. Word has length 179 [2021-12-14 16:22:18,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:18,207 INFO L470 AbstractCegarLoop]: Abstraction has 6249 states and 8218 transitions. [2021-12-14 16:22:18,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6249 states and 8218 transitions. [2021-12-14 16:22:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:22:18,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:18,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:18,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:22:18,212 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2110320793, now seen corresponding path program 1 times [2021-12-14 16:22:18,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:18,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521315119] [2021-12-14 16:22:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:18,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:18,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:18,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:22:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:18,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:22:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:18,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:22:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:18,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:22:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:18,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:18,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521315119] [2021-12-14 16:22:18,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521315119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:18,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:18,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:18,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645132931] [2021-12-14 16:22:18,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:18,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:18,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:18,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:18,397 INFO L87 Difference]: Start difference. First operand 6249 states and 8218 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:21,599 INFO L93 Difference]: Finished difference Result 10687 states and 15265 transitions. [2021-12-14 16:22:21,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:22:21,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:22:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:21,622 INFO L225 Difference]: With dead ends: 10687 [2021-12-14 16:22:21,622 INFO L226 Difference]: Without dead ends: 8872 [2021-12-14 16:22:21,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:22:21,629 INFO L933 BasicCegarLoop]: 1101 mSDtfsCounter, 1798 mSDsluCounter, 2219 mSDsCounter, 0 mSdLazyCounter, 3148 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1829 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 3148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:21,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1829 Valid, 3320 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 3148 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 16:22:21,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8872 states. [2021-12-14 16:22:22,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8872 to 7696. [2021-12-14 16:22:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7696 states, 6449 states have (on average 1.3727709722437587) internal successors, (8853), 6520 states have internal predecessors, (8853), 700 states have call successors, (700), 418 states have call predecessors, (700), 545 states have return successors, (921), 767 states have call predecessors, (921), 696 states have call successors, (921) [2021-12-14 16:22:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7696 states to 7696 states and 10474 transitions. [2021-12-14 16:22:22,098 INFO L78 Accepts]: Start accepts. Automaton has 7696 states and 10474 transitions. Word has length 179 [2021-12-14 16:22:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:22,098 INFO L470 AbstractCegarLoop]: Abstraction has 7696 states and 10474 transitions. [2021-12-14 16:22:22,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 7696 states and 10474 transitions. [2021-12-14 16:22:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-14 16:22:22,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:22,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:22,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:22:22,103 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash 787141847, now seen corresponding path program 1 times [2021-12-14 16:22:22,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:22,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442022000] [2021-12-14 16:22:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:22,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:22,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 16:22:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:22,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 16:22:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:22,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 16:22:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:22,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 16:22:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:22,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442022000] [2021-12-14 16:22:22,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442022000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:22,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:22,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:22,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021591570] [2021-12-14 16:22:22,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:22,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:22,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:22,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:22,228 INFO L87 Difference]: Start difference. First operand 7696 states and 10474 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:24,215 INFO L93 Difference]: Finished difference Result 12145 states and 17573 transitions. [2021-12-14 16:22:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:22:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-14 16:22:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:24,247 INFO L225 Difference]: With dead ends: 12145 [2021-12-14 16:22:24,247 INFO L226 Difference]: Without dead ends: 8883 [2021-12-14 16:22:24,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:22:24,259 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 1359 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:24,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 1942 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:22:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8883 states.