./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_2.cil-1+token_ring.09.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39b635cc2ab0f0d4f8e606a07f9fc2cea48a2218c52549f8b5aa54058d2e5b4b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:05:49,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:05:49,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:05:49,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:05:49,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:05:49,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:05:49,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:05:49,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:05:49,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:05:49,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:05:49,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:05:49,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:05:49,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:05:49,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:05:49,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:05:49,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:05:49,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:05:49,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:05:49,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:05:49,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:05:49,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:05:49,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:05:49,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:05:49,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:05:49,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:05:49,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:05:49,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:05:49,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:05:49,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:05:49,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:05:49,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:05:49,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:05:49,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:05:49,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:05:49,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:05:49,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:05:49,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:05:49,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:05:49,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:05:49,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:05:49,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:05:49,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:05:49,664 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:05:49,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:05:49,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:05:49,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:05:49,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:05:49,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:05:49,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:05:49,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:05:49,667 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:05:49,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:05:49,668 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:05:49,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:05:49,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:05:49,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:05:49,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:05:49,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:05:49,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:05:49,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:05:49,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:05:49,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:05:49,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:05:49,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:05:49,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:05:49,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:05:49,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:05:49,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:05:49,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:05:49,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:05:49,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:05:49,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:05:49,673 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:05:49,674 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:05:49,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:05:49,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:05:49,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b635cc2ab0f0d4f8e606a07f9fc2cea48a2218c52549f8b5aa54058d2e5b4b [2021-12-17 21:05:49,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:05:49,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:05:49,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:05:49,967 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:05:49,967 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:05:49,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2021-12-17 21:05:50,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ad68fdbf/4ed73ebf8aef45468bb2e803008e71c3/FLAG772f0839c [2021-12-17 21:05:50,516 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:05:50,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2021-12-17 21:05:50,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ad68fdbf/4ed73ebf8aef45468bb2e803008e71c3/FLAG772f0839c [2021-12-17 21:05:50,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ad68fdbf/4ed73ebf8aef45468bb2e803008e71c3 [2021-12-17 21:05:50,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:05:50,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:05:50,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:05:50,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:05:50,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:05:50,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:05:50" (1/1) ... [2021-12-17 21:05:50,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fc99c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:50, skipping insertion in model container [2021-12-17 21:05:50,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:05:50" (1/1) ... [2021-12-17 21:05:50,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:05:50,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:05:51,064 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_2.cil-1+token_ring.09.cil-2.c[914,927] [2021-12-17 21:05:51,126 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_2.cil-1+token_ring.09.cil-2.c[7115,7128] [2021-12-17 21:05:51,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:05:51,221 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:05:51,239 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_2.cil-1+token_ring.09.cil-2.c[914,927] [2021-12-17 21:05:51,249 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_2.cil-1+token_ring.09.cil-2.c[7115,7128] [2021-12-17 21:05:51,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:05:51,300 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:05:51,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51 WrapperNode [2021-12-17 21:05:51,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:05:51,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:05:51,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:05:51,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:05:51,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,366 INFO L137 Inliner]: procedures = 71, calls = 85, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 871 [2021-12-17 21:05:51,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:05:51,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:05:51,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:05:51,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:05:51,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:05:51,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:05:51,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:05:51,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:05:51,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (1/1) ... [2021-12-17 21:05:51,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:05:51,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:05:51,500 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) [2021-12-17 21:05:51,515 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 [2021-12-17 21:05:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:05:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:05:51,542 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:05:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-17 21:05:51,542 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-17 21:05:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:05:51,542 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:05:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:05:51,542 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:05:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-17 21:05:51,543 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-17 21:05:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:05:51,543 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:05:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:05:51,543 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:05:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-17 21:05:51,544 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-17 21:05:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-17 21:05:51,544 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-17 21:05:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-17 21:05:51,544 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-17 21:05:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:05:51,544 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:05:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:05:51,545 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:05:51,545 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:05:51,545 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-17 21:05:51,545 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-17 21:05:51,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:05:51,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:05:51,545 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:05:51,545 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:05:51,546 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-17 21:05:51,546 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-17 21:05:51,647 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:05:51,648 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:05:52,167 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:05:52,174 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:05:52,174 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-12-17 21:05:52,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:05:52 BoogieIcfgContainer [2021-12-17 21:05:52,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:05:52,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:05:52,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:05:52,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:05:52,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:05:50" (1/3) ... [2021-12-17 21:05:52,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27231cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:05:52, skipping insertion in model container [2021-12-17 21:05:52,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:05:51" (2/3) ... [2021-12-17 21:05:52,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27231cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:05:52, skipping insertion in model container [2021-12-17 21:05:52,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:05:52" (3/3) ... [2021-12-17 21:05:52,182 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2021-12-17 21:05:52,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:05:52,186 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:05:52,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:05:52,223 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 [2021-12-17 21:05:52,223 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:05:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 416 states, 359 states have (on average 1.6323119777158774) internal successors, (586), 367 states have internal predecessors, (586), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-17 21:05:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:52,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:52,255 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] [2021-12-17 21:05:52,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:52,259 INFO L85 PathProgramCache]: Analyzing trace with hash 910047860, now seen corresponding path program 1 times [2021-12-17 21:05:52,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:52,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4226137] [2021-12-17 21:05:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:52,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:52,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:52,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:52,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:52,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:52,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:52,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:52,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:52,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4226137] [2021-12-17 21:05:52,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4226137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:52,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:52,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:05:52,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667879585] [2021-12-17 21:05:52,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:52,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:05:52,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:05:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:05:52,624 INFO L87 Difference]: Start difference. First operand has 416 states, 359 states have (on average 1.6323119777158774) internal successors, (586), 367 states have internal predecessors, (586), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) 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) [2021-12-17 21:05:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:53,403 INFO L93 Difference]: Finished difference Result 941 states and 1492 transitions. [2021-12-17 21:05:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:05:53,405 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 [2021-12-17 21:05:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:53,415 INFO L225 Difference]: With dead ends: 941 [2021-12-17 21:05:53,415 INFO L226 Difference]: Without dead ends: 540 [2021-12-17 21:05:53,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:05:53,423 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 1316 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:53,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1321 Valid, 1861 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:05:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-17 21:05:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 501. [2021-12-17 21:05:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 427 states have (on average 1.515222482435597) internal successors, (647), 434 states have internal predecessors, (647), 50 states have call successors, (50), 22 states have call predecessors, (50), 22 states have return successors, (51), 47 states have call predecessors, (51), 46 states have call successors, (51) [2021-12-17 21:05:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 748 transitions. [2021-12-17 21:05:53,492 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 748 transitions. Word has length 65 [2021-12-17 21:05:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:53,493 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 748 transitions. [2021-12-17 21:05:53,493 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) [2021-12-17 21:05:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 748 transitions. [2021-12-17 21:05:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:53,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:53,496 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] [2021-12-17 21:05:53,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:05:53,497 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:53,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1313833811, now seen corresponding path program 1 times [2021-12-17 21:05:53,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:53,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629220908] [2021-12-17 21:05:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:53,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:53,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:53,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:53,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:53,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:53,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:53,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:53,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:53,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:53,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629220908] [2021-12-17 21:05:53,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629220908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:53,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:53,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:05:53,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965572749] [2021-12-17 21:05:53,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:53,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:05:53,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:05:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:05:53,593 INFO L87 Difference]: Start difference. First operand 501 states and 748 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) [2021-12-17 21:05:54,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:54,508 INFO L93 Difference]: Finished difference Result 848 states and 1225 transitions. [2021-12-17 21:05:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:05:54,509 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 [2021-12-17 21:05:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:54,513 INFO L225 Difference]: With dead ends: 848 [2021-12-17 21:05:54,514 INFO L226 Difference]: Without dead ends: 671 [2021-12-17 21:05:54,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:05:54,516 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 1203 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:54,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1231 Valid, 2404 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:05:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-12-17 21:05:54,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2021-12-17 21:05:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 503 states have (on average 1.4930417495029822) internal successors, (751), 512 states have internal predecessors, (751), 61 states have call successors, (61), 29 states have call predecessors, (61), 31 states have return successors, (70), 59 states have call predecessors, (70), 57 states have call successors, (70) [2021-12-17 21:05:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 882 transitions. [2021-12-17 21:05:54,561 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 882 transitions. Word has length 65 [2021-12-17 21:05:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:54,561 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 882 transitions. [2021-12-17 21:05:54,561 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) [2021-12-17 21:05:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 882 transitions. [2021-12-17 21:05:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:54,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:54,565 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] [2021-12-17 21:05:54,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:05:54,565 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash -714752299, now seen corresponding path program 1 times [2021-12-17 21:05:54,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:54,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17689584] [2021-12-17 21:05:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:54,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:54,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:54,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:54,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:54,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:54,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:54,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:54,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:54,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17689584] [2021-12-17 21:05:54,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17689584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:54,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:54,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:05:54,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245430903] [2021-12-17 21:05:54,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:54,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:05:54,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:05:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:05:54,716 INFO L87 Difference]: Start difference. First operand 597 states and 882 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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) [2021-12-17 21:05:55,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:55,559 INFO L93 Difference]: Finished difference Result 898 states and 1296 transitions. [2021-12-17 21:05:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:05:55,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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 65 [2021-12-17 21:05:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:55,568 INFO L225 Difference]: With dead ends: 898 [2021-12-17 21:05:55,568 INFO L226 Difference]: Without dead ends: 631 [2021-12-17 21:05:55,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:05:55,570 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 532 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:55,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 2871 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:05:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-12-17 21:05:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 602. [2021-12-17 21:05:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 507 states have (on average 1.485207100591716) internal successors, (753), 516 states have internal predecessors, (753), 61 states have call successors, (61), 29 states have call predecessors, (61), 32 states have return successors, (71), 60 states have call predecessors, (71), 57 states have call successors, (71) [2021-12-17 21:05:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 885 transitions. [2021-12-17 21:05:55,628 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 885 transitions. Word has length 65 [2021-12-17 21:05:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:55,629 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 885 transitions. [2021-12-17 21:05:55,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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) [2021-12-17 21:05:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 885 transitions. [2021-12-17 21:05:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:55,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:55,654 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] [2021-12-17 21:05:55,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:05:55,655 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1744111597, now seen corresponding path program 1 times [2021-12-17 21:05:55,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:55,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869389406] [2021-12-17 21:05:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:55,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:55,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:55,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:55,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:55,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:55,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:55,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:55,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:55,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869389406] [2021-12-17 21:05:55,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869389406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:55,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:55,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:05:55,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774636706] [2021-12-17 21:05:55,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:55,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:05:55,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:05:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:05:55,826 INFO L87 Difference]: Start difference. First operand 602 states and 885 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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) [2021-12-17 21:05:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:56,632 INFO L93 Difference]: Finished difference Result 920 states and 1318 transitions. [2021-12-17 21:05:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:05:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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 65 [2021-12-17 21:05:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:56,636 INFO L225 Difference]: With dead ends: 920 [2021-12-17 21:05:56,636 INFO L226 Difference]: Without dead ends: 648 [2021-12-17 21:05:56,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:05:56,638 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 532 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 2864 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:56,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 2864 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:05:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-12-17 21:05:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 617. [2021-12-17 21:05:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 519 states have (on average 1.4739884393063585) internal successors, (765), 528 states have internal predecessors, (765), 61 states have call successors, (61), 29 states have call predecessors, (61), 35 states have return successors, (74), 63 states have call predecessors, (74), 57 states have call successors, (74) [2021-12-17 21:05:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 900 transitions. [2021-12-17 21:05:56,661 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 900 transitions. Word has length 65 [2021-12-17 21:05:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:56,661 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 900 transitions. [2021-12-17 21:05:56,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 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) [2021-12-17 21:05:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 900 transitions. [2021-12-17 21:05:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:56,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:56,664 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] [2021-12-17 21:05:56,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:05:56,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash -357908203, now seen corresponding path program 1 times [2021-12-17 21:05:56,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:56,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297491057] [2021-12-17 21:05:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:56,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:56,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:56,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:56,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:56,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:56,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:56,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:56,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:56,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297491057] [2021-12-17 21:05:56,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297491057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:56,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:56,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:05:56,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051112059] [2021-12-17 21:05:56,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:56,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:05:56,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:56,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:05:56,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:05:56,745 INFO L87 Difference]: Start difference. First operand 617 states and 900 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) [2021-12-17 21:05:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:57,532 INFO L93 Difference]: Finished difference Result 1009 states and 1411 transitions. [2021-12-17 21:05:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:05:57,533 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 [2021-12-17 21:05:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:57,535 INFO L225 Difference]: With dead ends: 1009 [2021-12-17 21:05:57,536 INFO L226 Difference]: Without dead ends: 724 [2021-12-17 21:05:57,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:05:57,537 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 1207 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:57,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1233 Valid, 2167 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:05:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-12-17 21:05:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 629. [2021-12-17 21:05:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 529 states have (on average 1.4650283553875236) internal successors, (775), 538 states have internal predecessors, (775), 62 states have call successors, (62), 30 states have call predecessors, (62), 36 states have return successors, (73), 64 states have call predecessors, (73), 58 states have call successors, (73) [2021-12-17 21:05:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 910 transitions. [2021-12-17 21:05:57,558 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 910 transitions. Word has length 65 [2021-12-17 21:05:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:57,559 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 910 transitions. [2021-12-17 21:05:57,559 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) [2021-12-17 21:05:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 910 transitions. [2021-12-17 21:05:57,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:57,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:57,560 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] [2021-12-17 21:05:57,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:05:57,561 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:57,561 INFO L85 PathProgramCache]: Analyzing trace with hash -491921709, now seen corresponding path program 1 times [2021-12-17 21:05:57,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:57,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16793621] [2021-12-17 21:05:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:57,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:57,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:57,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:57,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:57,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:57,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:57,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:57,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:57,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:57,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16793621] [2021-12-17 21:05:57,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16793621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:57,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:57,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:57,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704742219] [2021-12-17 21:05:57,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:57,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:57,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:57,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:57,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:57,660 INFO L87 Difference]: Start difference. First operand 629 states and 910 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 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) [2021-12-17 21:05:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:58,060 INFO L93 Difference]: Finished difference Result 1271 states and 1757 transitions. [2021-12-17 21:05:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:05:58,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 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 [2021-12-17 21:05:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:58,065 INFO L225 Difference]: With dead ends: 1271 [2021-12-17 21:05:58,065 INFO L226 Difference]: Without dead ends: 975 [2021-12-17 21:05:58,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-17 21:05:58,069 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1472 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:58,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1477 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:05:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-17 21:05:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 919. [2021-12-17 21:05:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 753 states have (on average 1.4103585657370519) internal successors, (1062), 769 states have internal predecessors, (1062), 97 states have call successors, (97), 52 states have call predecessors, (97), 67 states have return successors, (130), 104 states have call predecessors, (130), 93 states have call successors, (130) [2021-12-17 21:05:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1289 transitions. [2021-12-17 21:05:58,102 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1289 transitions. Word has length 65 [2021-12-17 21:05:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:58,103 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1289 transitions. [2021-12-17 21:05:58,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 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) [2021-12-17 21:05:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1289 transitions. [2021-12-17 21:05:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:05:58,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:58,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:58,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:05:58,105 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:58,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1681946624, now seen corresponding path program 1 times [2021-12-17 21:05:58,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:58,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087344520] [2021-12-17 21:05:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:58,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:58,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:58,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087344520] [2021-12-17 21:05:58,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087344520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:58,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:58,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:05:58,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485763147] [2021-12-17 21:05:58,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:58,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:05:58,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:05:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:05:58,181 INFO L87 Difference]: Start difference. First operand 919 states and 1289 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:05:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:58,751 INFO L93 Difference]: Finished difference Result 2122 states and 2860 transitions. [2021-12-17 21:05:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:05:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-17 21:05:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:58,762 INFO L225 Difference]: With dead ends: 2122 [2021-12-17 21:05:58,762 INFO L226 Difference]: Without dead ends: 1515 [2021-12-17 21:05:58,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:05:58,766 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 1013 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:58,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 1477 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:05:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-12-17 21:05:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1400. [2021-12-17 21:05:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1132 states have (on average 1.3630742049469964) internal successors, (1543), 1151 states have internal predecessors, (1543), 142 states have call successors, (142), 96 states have call predecessors, (142), 124 states have return successors, (202), 159 states have call predecessors, (202), 138 states have call successors, (202) [2021-12-17 21:05:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1887 transitions. [2021-12-17 21:05:58,837 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1887 transitions. Word has length 66 [2021-12-17 21:05:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:58,838 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 1887 transitions. [2021-12-17 21:05:58,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:05:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1887 transitions. [2021-12-17 21:05:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:05:58,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:58,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:58,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 21:05:58,841 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash -223706965, now seen corresponding path program 1 times [2021-12-17 21:05:58,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:58,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889042907] [2021-12-17 21:05:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:58,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:58,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:58,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889042907] [2021-12-17 21:05:58,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889042907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:58,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:58,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:05:58,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375552618] [2021-12-17 21:05:58,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:58,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:05:58,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:58,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:05:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:05:58,927 INFO L87 Difference]: Start difference. First operand 1400 states and 1887 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:05:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:59,550 INFO L93 Difference]: Finished difference Result 3588 states and 4693 transitions. [2021-12-17 21:05:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:05:59,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-17 21:05:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:59,564 INFO L225 Difference]: With dead ends: 3588 [2021-12-17 21:05:59,564 INFO L226 Difference]: Without dead ends: 2520 [2021-12-17 21:05:59,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-17 21:05:59,571 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1175 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:59,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1491 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:05:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-12-17 21:05:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2262. [2021-12-17 21:05:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 1798 states have (on average 1.318131256952169) internal successors, (2370), 1827 states have internal predecessors, (2370), 240 states have call successors, (240), 180 states have call predecessors, (240), 222 states have return successors, (338), 261 states have call predecessors, (338), 236 states have call successors, (338) [2021-12-17 21:05:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 2948 transitions. [2021-12-17 21:05:59,684 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 2948 transitions. Word has length 66 [2021-12-17 21:05:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:59,684 INFO L470 AbstractCegarLoop]: Abstraction has 2262 states and 2948 transitions. [2021-12-17 21:05:59,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:05:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 2948 transitions. [2021-12-17 21:05:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 21:05:59,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:59,688 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] [2021-12-17 21:05:59,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 21:05:59,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1790634273, now seen corresponding path program 1 times [2021-12-17 21:05:59,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:59,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711113846] [2021-12-17 21:05:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:59,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:59,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:59,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:59,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:59,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:59,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:59,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:59,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:59,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711113846] [2021-12-17 21:05:59,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711113846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:59,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:59,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:05:59,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54180612] [2021-12-17 21:05:59,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:59,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:05:59,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:59,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:05:59,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:05:59,793 INFO L87 Difference]: Start difference. First operand 2262 states and 2948 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:00,274 INFO L93 Difference]: Finished difference Result 5172 states and 6598 transitions. [2021-12-17 21:06:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:06:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-17 21:06:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:00,285 INFO L225 Difference]: With dead ends: 5172 [2021-12-17 21:06:00,285 INFO L226 Difference]: Without dead ends: 3242 [2021-12-17 21:06:00,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:06:00,291 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 1160 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:00,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 1537 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:06:00,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-12-17 21:06:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2994. [2021-12-17 21:06:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2366 states have (on average 1.2992392223161453) internal successors, (3074), 2403 states have internal predecessors, (3074), 320 states have call successors, (320), 250 states have call predecessors, (320), 306 states have return successors, (447), 347 states have call predecessors, (447), 316 states have call successors, (447) [2021-12-17 21:06:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 3841 transitions. [2021-12-17 21:06:00,396 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 3841 transitions. Word has length 72 [2021-12-17 21:06:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:00,396 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 3841 transitions. [2021-12-17 21:06:00,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 3841 transitions. [2021-12-17 21:06:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 21:06:00,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:00,399 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:00,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 21:06:00,399 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:00,399 INFO L85 PathProgramCache]: Analyzing trace with hash -191825039, now seen corresponding path program 1 times [2021-12-17 21:06:00,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:00,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235368047] [2021-12-17 21:06:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:00,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:00,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:00,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:00,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:00,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:00,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:00,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:00,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:00,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:00,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235368047] [2021-12-17 21:06:00,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235368047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:00,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:00,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:00,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677787548] [2021-12-17 21:06:00,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:00,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:00,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:00,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:00,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:00,465 INFO L87 Difference]: Start difference. First operand 2994 states and 3841 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 21:06:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:00,925 INFO L93 Difference]: Finished difference Result 3768 states and 4772 transitions. [2021-12-17 21:06:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:06:00,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-17 21:06:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:00,954 INFO L225 Difference]: With dead ends: 3768 [2021-12-17 21:06:00,954 INFO L226 Difference]: Without dead ends: 3765 [2021-12-17 21:06:00,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-17 21:06:00,956 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1759 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1769 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:00,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1769 Valid, 1505 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:06:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2021-12-17 21:06:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 3488. [2021-12-17 21:06:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 2751 states have (on average 1.2889858233369684) internal successors, (3546), 2793 states have internal predecessors, (3546), 370 states have call successors, (370), 294 states have call predecessors, (370), 365 states have return successors, (526), 407 states have call predecessors, (526), 367 states have call successors, (526) [2021-12-17 21:06:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 4442 transitions. [2021-12-17 21:06:01,073 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 4442 transitions. Word has length 73 [2021-12-17 21:06:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:01,074 INFO L470 AbstractCegarLoop]: Abstraction has 3488 states and 4442 transitions. [2021-12-17 21:06:01,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 21:06:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 4442 transitions. [2021-12-17 21:06:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 21:06:01,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:01,076 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:01,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:06:01,077 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:01,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:01,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1652850327, now seen corresponding path program 1 times [2021-12-17 21:06:01,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:01,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950622251] [2021-12-17 21:06:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:01,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:01,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:01,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:01,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:01,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:01,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:01,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:01,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:01,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950622251] [2021-12-17 21:06:01,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950622251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:06:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733916925] [2021-12-17 21:06:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:01,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:06:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:06:01,222 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) [2021-12-17 21:06:01,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:06:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:01,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:06:01,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:06:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:02,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:06:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:02,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733916925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:06:02,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 21:06:02,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-17 21:06:02,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032702713] [2021-12-17 21:06:02,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 21:06:02,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:06:02,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:06:02,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:06:02,422 INFO L87 Difference]: Start difference. First operand 3488 states and 4442 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-17 21:06:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:03,874 INFO L93 Difference]: Finished difference Result 7929 states and 9928 transitions. [2021-12-17 21:06:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 21:06:03,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-17 21:06:03,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:03,898 INFO L225 Difference]: With dead ends: 7929 [2021-12-17 21:06:03,898 INFO L226 Difference]: Without dead ends: 7926 [2021-12-17 21:06:03,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-17 21:06:03,900 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 2185 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:03,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2254 Valid, 2564 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:06:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-12-17 21:06:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 5278. [2021-12-17 21:06:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 4155 states have (on average 1.2808664259927798) internal successors, (5322), 4219 states have internal predecessors, (5322), 554 states have call successors, (554), 452 states have call predecessors, (554), 567 states have return successors, (804), 613 states have call predecessors, (804), 551 states have call successors, (804) [2021-12-17 21:06:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 6680 transitions. [2021-12-17 21:06:04,120 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 6680 transitions. Word has length 74 [2021-12-17 21:06:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:04,120 INFO L470 AbstractCegarLoop]: Abstraction has 5278 states and 6680 transitions. [2021-12-17 21:06:04,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-17 21:06:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 6680 transitions. [2021-12-17 21:06:04,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 21:06:04,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:04,123 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:04,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:06:04,341 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,SelfDestructingSolverStorable10 [2021-12-17 21:06:04,341 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:04,341 INFO L85 PathProgramCache]: Analyzing trace with hash 304935921, now seen corresponding path program 2 times [2021-12-17 21:06:04,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:04,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263291703] [2021-12-17 21:06:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:04,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:04,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:04,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:04,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:04,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:04,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:04,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:04,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:04,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263291703] [2021-12-17 21:06:04,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263291703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:04,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:04,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:06:04,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395905875] [2021-12-17 21:06:04,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:04,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:04,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:06:04,405 INFO L87 Difference]: Start difference. First operand 5278 states and 6680 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 21:06:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:04,869 INFO L93 Difference]: Finished difference Result 7960 states and 10053 transitions. [2021-12-17 21:06:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 21:06:04,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-17 21:06:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:04,887 INFO L225 Difference]: With dead ends: 7960 [2021-12-17 21:06:04,888 INFO L226 Difference]: Without dead ends: 3885 [2021-12-17 21:06:04,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:06:04,894 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 1080 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:04,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1647 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:06:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-12-17 21:06:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3650. [2021-12-17 21:06:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 2883 states have (on average 1.2702046479361775) internal successors, (3662), 2925 states have internal predecessors, (3662), 386 states have call successors, (386), 308 states have call predecessors, (386), 379 states have return successors, (530), 423 states have call predecessors, (530), 383 states have call successors, (530) [2021-12-17 21:06:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 4578 transitions. [2021-12-17 21:06:05,016 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 4578 transitions. Word has length 77 [2021-12-17 21:06:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:05,017 INFO L470 AbstractCegarLoop]: Abstraction has 3650 states and 4578 transitions. [2021-12-17 21:06:05,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 21:06:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 4578 transitions. [2021-12-17 21:06:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 21:06:05,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:05,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:05,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:06:05,020 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash -385956453, now seen corresponding path program 1 times [2021-12-17 21:06:05,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:05,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356669522] [2021-12-17 21:06:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:05,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:05,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:05,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:05,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:05,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:05,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:05,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 21:06:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:06:05,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:05,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356669522] [2021-12-17 21:06:05,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356669522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:05,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:05,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:06:05,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282750481] [2021-12-17 21:06:05,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:05,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:06:05,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:06:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:06:05,093 INFO L87 Difference]: Start difference. First operand 3650 states and 4578 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:06:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:06,206 INFO L93 Difference]: Finished difference Result 10522 states and 12995 transitions. [2021-12-17 21:06:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 21:06:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-17 21:06:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:06,226 INFO L225 Difference]: With dead ends: 10522 [2021-12-17 21:06:06,227 INFO L226 Difference]: Without dead ends: 5885 [2021-12-17 21:06:06,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-17 21:06:06,237 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 1560 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:06,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1576 Valid, 1908 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:06:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-12-17 21:06:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5565. [2021-12-17 21:06:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5565 states, 4341 states have (on average 1.2404975812024879) internal successors, (5385), 4426 states have internal predecessors, (5385), 590 states have call successors, (590), 482 states have call predecessors, (590), 632 states have return successors, (912), 663 states have call predecessors, (912), 587 states have call successors, (912) [2021-12-17 21:06:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5565 states to 5565 states and 6887 transitions. [2021-12-17 21:06:06,435 INFO L78 Accepts]: Start accepts. Automaton has 5565 states and 6887 transitions. Word has length 84 [2021-12-17 21:06:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:06,436 INFO L470 AbstractCegarLoop]: Abstraction has 5565 states and 6887 transitions. [2021-12-17 21:06:06,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:06:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states and 6887 transitions. [2021-12-17 21:06:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 21:06:06,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:06,441 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:06,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:06:06,441 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1773640047, now seen corresponding path program 1 times [2021-12-17 21:06:06,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:06,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815355842] [2021-12-17 21:06:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:06,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:06,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:06,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:06,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:06,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:06,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:06,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:06,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:06,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 21:06:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 21:06:06,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:06,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815355842] [2021-12-17 21:06:06,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815355842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:06,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:06,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:06:06,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721138800] [2021-12-17 21:06:06,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:06:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:06:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:06:06,564 INFO L87 Difference]: Start difference. First operand 5565 states and 6887 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) [2021-12-17 21:06:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:07,783 INFO L93 Difference]: Finished difference Result 9568 states and 11727 transitions. [2021-12-17 21:06:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 21:06:07,783 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 93 [2021-12-17 21:06:07,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:07,798 INFO L225 Difference]: With dead ends: 9568 [2021-12-17 21:06:07,801 INFO L226 Difference]: Without dead ends: 4975 [2021-12-17 21:06:07,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-17 21:06:07,808 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 2136 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2179 SdHoareTripleChecker+Valid, 2223 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:07,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2179 Valid, 2223 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:06:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4975 states. [2021-12-17 21:06:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4975 to 4641. [2021-12-17 21:06:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 3630 states have (on average 1.2352617079889807) internal successors, (4484), 3697 states have internal predecessors, (4484), 491 states have call successors, (491), 397 states have call predecessors, (491), 518 states have return successors, (690), 553 states have call predecessors, (690), 488 states have call successors, (690) [2021-12-17 21:06:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 5665 transitions. [2021-12-17 21:06:07,940 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 5665 transitions. Word has length 93 [2021-12-17 21:06:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:07,941 INFO L470 AbstractCegarLoop]: Abstraction has 4641 states and 5665 transitions. [2021-12-17 21:06:07,941 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) [2021-12-17 21:06:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 5665 transitions. [2021-12-17 21:06:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 21:06:07,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:07,946 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:07,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:06:07,947 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:07,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1026333805, now seen corresponding path program 1 times [2021-12-17 21:06:07,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:07,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046107714] [2021-12-17 21:06:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:07,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:07,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:07,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:07,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:07,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 21:06:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 21:06:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:06:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:06:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 21:06:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 21:06:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-17 21:06:08,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046107714] [2021-12-17 21:06:08,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046107714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:06:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104185250] [2021-12-17 21:06:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:08,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:06:08,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:06:08,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:06:08,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 21:06:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:06:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:06:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:06:08,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:06:08,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104185250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:08,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:06:08,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-17 21:06:08,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714722434] [2021-12-17 21:06:08,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:08,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:08,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:08,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 21:06:08,370 INFO L87 Difference]: Start difference. First operand 4641 states and 5665 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:06:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:08,485 INFO L93 Difference]: Finished difference Result 6807 states and 8288 transitions. [2021-12-17 21:06:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:06:08,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-17 21:06:08,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:08,491 INFO L225 Difference]: With dead ends: 6807 [2021-12-17 21:06:08,491 INFO L226 Difference]: Without dead ends: 2502 [2021-12-17 21:06:08,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-17 21:06:08,499 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 34 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:08,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3028 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:06:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-12-17 21:06:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2377. [2021-12-17 21:06:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 1943 states have (on average 1.2506433350488935) internal successors, (2430), 1959 states have internal predecessors, (2430), 215 states have call successors, (215), 163 states have call predecessors, (215), 217 states have return successors, (297), 255 states have call predecessors, (297), 212 states have call successors, (297) [2021-12-17 21:06:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 2942 transitions. [2021-12-17 21:06:08,568 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 2942 transitions. Word has length 145 [2021-12-17 21:06:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:08,569 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 2942 transitions. [2021-12-17 21:06:08,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:06:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 2942 transitions. [2021-12-17 21:06:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 21:06:08,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:08,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:08,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 21:06:08,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 21:06:08,792 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1451779089, now seen corresponding path program 1 times [2021-12-17 21:06:08,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:08,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659794113] [2021-12-17 21:06:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:08,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 21:06:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 21:06:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 21:06:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 21:06:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 21:06:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 21:06:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 21:06:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 21:06:08,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:08,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659794113] [2021-12-17 21:06:08,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659794113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:08,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:08,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:06:08,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391781058] [2021-12-17 21:06:08,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:08,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:08,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:08,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:08,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:06:08,908 INFO L87 Difference]: Start difference. First operand 2377 states and 2942 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 21:06:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:09,341 INFO L93 Difference]: Finished difference Result 2442 states and 3010 transitions. [2021-12-17 21:06:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:06:09,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-17 21:06:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:09,345 INFO L225 Difference]: With dead ends: 2442 [2021-12-17 21:06:09,345 INFO L226 Difference]: Without dead ends: 1999 [2021-12-17 21:06:09,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:06:09,347 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 633 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:09,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 1684 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:06:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2021-12-17 21:06:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1937. [2021-12-17 21:06:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1599 states have (on average 1.2670419011882426) internal successors, (2026), 1612 states have internal predecessors, (2026), 169 states have call successors, (169), 123 states have call predecessors, (169), 167 states have return successors, (233), 202 states have call predecessors, (233), 166 states have call successors, (233) [2021-12-17 21:06:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2428 transitions. [2021-12-17 21:06:09,476 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2428 transitions. Word has length 147 [2021-12-17 21:06:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:09,476 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 2428 transitions. [2021-12-17 21:06:09,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 21:06:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2428 transitions. [2021-12-17 21:06:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:09,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:09,480 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] [2021-12-17 21:06:09,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:06:09,480 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 835864378, now seen corresponding path program 1 times [2021-12-17 21:06:09,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:09,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508336997] [2021-12-17 21:06:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:09,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:09,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:09,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:09,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:09,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:09,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508336997] [2021-12-17 21:06:09,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508336997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:09,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:09,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:06:09,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983767092] [2021-12-17 21:06:09,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:09,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:06:09,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:06:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:06:09,604 INFO L87 Difference]: Start difference. First operand 1937 states and 2428 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-12-17 21:06:10,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:10,526 INFO L93 Difference]: Finished difference Result 2347 states and 3088 transitions. [2021-12-17 21:06:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:06:10,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:10,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:10,531 INFO L225 Difference]: With dead ends: 2347 [2021-12-17 21:06:10,531 INFO L226 Difference]: Without dead ends: 2046 [2021-12-17 21:06:10,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:06:10,533 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 919 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:10,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 1181 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:06:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-12-17 21:06:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1937. [2021-12-17 21:06:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1599 states have (on average 1.2664165103189493) internal successors, (2025), 1612 states have internal predecessors, (2025), 169 states have call successors, (169), 123 states have call predecessors, (169), 167 states have return successors, (233), 202 states have call predecessors, (233), 166 states have call successors, (233) [2021-12-17 21:06:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2427 transitions. [2021-12-17 21:06:10,658 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2427 transitions. Word has length 146 [2021-12-17 21:06:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:10,659 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 2427 transitions. [2021-12-17 21:06:10,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-12-17 21:06:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2427 transitions. [2021-12-17 21:06:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:10,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:10,662 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] [2021-12-17 21:06:10,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:06:10,662 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash 417975676, now seen corresponding path program 1 times [2021-12-17 21:06:10,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:10,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638966286] [2021-12-17 21:06:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:10,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:10,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:10,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:10,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:10,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:10,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:10,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638966286] [2021-12-17 21:06:10,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638966286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:10,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:10,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:06:10,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545911917] [2021-12-17 21:06:10,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:10,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:10,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:06:10,777 INFO L87 Difference]: Start difference. First operand 1937 states and 2427 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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) [2021-12-17 21:06:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:12,660 INFO L93 Difference]: Finished difference Result 2751 states and 3738 transitions. [2021-12-17 21:06:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:06:12,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:12,665 INFO L225 Difference]: With dead ends: 2751 [2021-12-17 21:06:12,665 INFO L226 Difference]: Without dead ends: 2459 [2021-12-17 21:06:12,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:06:12,667 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 1442 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:12,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 1686 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 21:06:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-12-17 21:06:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2240. [2021-12-17 21:06:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1877 states have (on average 1.3148641449120937) internal successors, (2468), 1891 states have internal predecessors, (2468), 187 states have call successors, (187), 129 states have call predecessors, (187), 174 states have return successors, (254), 220 states have call predecessors, (254), 184 states have call successors, (254) [2021-12-17 21:06:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2909 transitions. [2021-12-17 21:06:12,750 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2909 transitions. Word has length 146 [2021-12-17 21:06:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:12,750 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 2909 transitions. [2021-12-17 21:06:12,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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) [2021-12-17 21:06:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2909 transitions. [2021-12-17 21:06:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:12,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:12,754 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] [2021-12-17 21:06:12,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:06:12,754 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1383489928, now seen corresponding path program 1 times [2021-12-17 21:06:12,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259367656] [2021-12-17 21:06:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:12,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:12,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:12,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:12,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:12,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:12,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259367656] [2021-12-17 21:06:12,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259367656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:12,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:12,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:12,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146758346] [2021-12-17 21:06:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:12,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:12,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:12,870 INFO L87 Difference]: Start difference. First operand 2240 states and 2909 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:15,185 INFO L93 Difference]: Finished difference Result 3479 states and 4905 transitions. [2021-12-17 21:06:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:06:15,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:15,199 INFO L225 Difference]: With dead ends: 3479 [2021-12-17 21:06:15,200 INFO L226 Difference]: Without dead ends: 2884 [2021-12-17 21:06:15,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:06:15,201 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 1538 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:15,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1564 Valid, 2070 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:06:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2021-12-17 21:06:15,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2522. [2021-12-17 21:06:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2134 states have (on average 1.344423617619494) internal successors, (2869), 2149 states have internal predecessors, (2869), 205 states have call successors, (205), 135 states have call predecessors, (205), 181 states have return successors, (274), 239 states have call predecessors, (274), 202 states have call successors, (274) [2021-12-17 21:06:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3348 transitions. [2021-12-17 21:06:15,298 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3348 transitions. Word has length 146 [2021-12-17 21:06:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:15,299 INFO L470 AbstractCegarLoop]: Abstraction has 2522 states and 3348 transitions. [2021-12-17 21:06:15,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3348 transitions. [2021-12-17 21:06:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:15,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:15,302 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] [2021-12-17 21:06:15,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:06:15,302 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:15,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:15,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2090086534, now seen corresponding path program 1 times [2021-12-17 21:06:15,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:15,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785563999] [2021-12-17 21:06:15,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:15,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:15,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:15,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:15,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:15,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:15,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:15,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:15,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785563999] [2021-12-17 21:06:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785563999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:15,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:15,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:15,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510636405] [2021-12-17 21:06:15,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:15,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:15,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:15,401 INFO L87 Difference]: Start difference. First operand 2522 states and 3348 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:17,639 INFO L93 Difference]: Finished difference Result 4552 states and 6612 transitions. [2021-12-17 21:06:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:06:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:17,650 INFO L225 Difference]: With dead ends: 4552 [2021-12-17 21:06:17,650 INFO L226 Difference]: Without dead ends: 3675 [2021-12-17 21:06:17,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:06:17,656 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 1459 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 2756 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:17,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 2756 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 21:06:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2021-12-17 21:06:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3087. [2021-12-17 21:06:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 2649 states have (on average 1.3861834654586636) internal successors, (3672), 2666 states have internal predecessors, (3672), 241 states have call successors, (241), 147 states have call predecessors, (241), 195 states have return successors, (318), 277 states have call predecessors, (318), 238 states have call successors, (318) [2021-12-17 21:06:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 4231 transitions. [2021-12-17 21:06:17,853 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 4231 transitions. Word has length 146 [2021-12-17 21:06:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:17,853 INFO L470 AbstractCegarLoop]: Abstraction has 3087 states and 4231 transitions. [2021-12-17 21:06:17,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 4231 transitions. [2021-12-17 21:06:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:17,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:17,857 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] [2021-12-17 21:06:17,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:06:17,858 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1143048648, now seen corresponding path program 1 times [2021-12-17 21:06:17,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:17,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622121740] [2021-12-17 21:06:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:17,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:17,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:17,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:17,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:18,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:18,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622121740] [2021-12-17 21:06:18,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622121740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:18,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:18,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:18,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481821610] [2021-12-17 21:06:18,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:18,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:18,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:18,007 INFO L87 Difference]: Start difference. First operand 3087 states and 4231 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:19,065 INFO L93 Difference]: Finished difference Result 5105 states and 7486 transitions. [2021-12-17 21:06:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:06:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:19,079 INFO L225 Difference]: With dead ends: 5105 [2021-12-17 21:06:19,079 INFO L226 Difference]: Without dead ends: 3663 [2021-12-17 21:06:19,084 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 [2021-12-17 21:06:19,085 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 1287 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:19,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 1394 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:06:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2021-12-17 21:06:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3087. [2021-12-17 21:06:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 2649 states have (on average 1.384295960739902) internal successors, (3667), 2666 states have internal predecessors, (3667), 241 states have call successors, (241), 147 states have call predecessors, (241), 195 states have return successors, (318), 277 states have call predecessors, (318), 238 states have call successors, (318) [2021-12-17 21:06:19,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 4226 transitions. [2021-12-17 21:06:19,256 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 4226 transitions. Word has length 146 [2021-12-17 21:06:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:19,257 INFO L470 AbstractCegarLoop]: Abstraction has 3087 states and 4226 transitions. [2021-12-17 21:06:19,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 4226 transitions. [2021-12-17 21:06:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:19,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:19,261 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] [2021-12-17 21:06:19,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:06:19,262 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:19,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:19,262 INFO L85 PathProgramCache]: Analyzing trace with hash -281215046, now seen corresponding path program 1 times [2021-12-17 21:06:19,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:19,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233467948] [2021-12-17 21:06:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:19,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:19,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:19,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:19,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:19,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:19,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:19,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:19,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233467948] [2021-12-17 21:06:19,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233467948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:19,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:19,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:19,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534230541] [2021-12-17 21:06:19,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:19,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:19,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:19,353 INFO L87 Difference]: Start difference. First operand 3087 states and 4226 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:21,525 INFO L93 Difference]: Finished difference Result 6610 states and 9843 transitions. [2021-12-17 21:06:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:06:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:21,538 INFO L225 Difference]: With dead ends: 6610 [2021-12-17 21:06:21,539 INFO L226 Difference]: Without dead ends: 5168 [2021-12-17 21:06:21,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:06:21,545 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 1443 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 2744 SdHoareTripleChecker+Invalid, 2676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:21,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 2744 Invalid, 2676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2560 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 21:06:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2021-12-17 21:06:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 4222. [2021-12-17 21:06:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4222 states, 3684 states have (on average 1.4315960912052117) internal successors, (5274), 3705 states have internal predecessors, (5274), 313 states have call successors, (313), 171 states have call predecessors, (313), 223 states have return successors, (412), 353 states have call predecessors, (412), 310 states have call successors, (412) [2021-12-17 21:06:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4222 states to 4222 states and 5999 transitions. [2021-12-17 21:06:21,798 INFO L78 Accepts]: Start accepts. Automaton has 4222 states and 5999 transitions. Word has length 146 [2021-12-17 21:06:21,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:21,798 INFO L470 AbstractCegarLoop]: Abstraction has 4222 states and 5999 transitions. [2021-12-17 21:06:21,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:21,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4222 states and 5999 transitions. [2021-12-17 21:06:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:21,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:21,815 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] [2021-12-17 21:06:21,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 21:06:21,816 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1963343352, now seen corresponding path program 1 times [2021-12-17 21:06:21,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:21,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430814743] [2021-12-17 21:06:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:21,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:21,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:21,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:21,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:21,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:21,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:21,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:21,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430814743] [2021-12-17 21:06:21,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430814743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:21,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:21,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:21,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271775061] [2021-12-17 21:06:21,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:21,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:21,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:21,963 INFO L87 Difference]: Start difference. First operand 4222 states and 5999 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:24,589 INFO L93 Difference]: Finished difference Result 10739 states and 16372 transitions. [2021-12-17 21:06:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:06:24,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:24,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:24,616 INFO L225 Difference]: With dead ends: 10739 [2021-12-17 21:06:24,616 INFO L226 Difference]: Without dead ends: 8162 [2021-12-17 21:06:24,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:06:24,623 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 1439 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 2740 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:24,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 2740 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:06:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8162 states. [2021-12-17 21:06:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8162 to 6496. [2021-12-17 21:06:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6496 states, 5758 states have (on average 1.4748176450156305) internal successors, (8492), 5787 states have internal predecessors, (8492), 457 states have call successors, (457), 219 states have call predecessors, (457), 279 states have return successors, (618), 505 states have call predecessors, (618), 454 states have call successors, (618) [2021-12-17 21:06:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6496 states to 6496 states and 9567 transitions. [2021-12-17 21:06:24,909 INFO L78 Accepts]: Start accepts. Automaton has 6496 states and 9567 transitions. Word has length 146 [2021-12-17 21:06:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:24,909 INFO L470 AbstractCegarLoop]: Abstraction has 6496 states and 9567 transitions. [2021-12-17 21:06:24,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 6496 states and 9567 transitions. [2021-12-17 21:06:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:24,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:24,914 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] [2021-12-17 21:06:24,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 21:06:24,914 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:24,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1843576838, now seen corresponding path program 1 times [2021-12-17 21:06:24,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:24,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222418545] [2021-12-17 21:06:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:24,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:24,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:24,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:25,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:25,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:25,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:25,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:25,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222418545] [2021-12-17 21:06:25,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222418545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:25,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:25,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:25,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792501298] [2021-12-17 21:06:25,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:25,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:25,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:25,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:25,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:25,020 INFO L87 Difference]: Start difference. First operand 6496 states and 9567 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:27,594 INFO L93 Difference]: Finished difference Result 18995 states and 29486 transitions. [2021-12-17 21:06:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:06:27,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:27,633 INFO L225 Difference]: With dead ends: 18995 [2021-12-17 21:06:27,633 INFO L226 Difference]: Without dead ends: 14144 [2021-12-17 21:06:27,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:06:27,656 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 1438 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2547 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:27,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 2734 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2547 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 21:06:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14144 states. [2021-12-17 21:06:28,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14144 to 11058. [2021-12-17 21:06:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11058 states, 9920 states have (on average 1.5068548387096774) internal successors, (14948), 9965 states have internal predecessors, (14948), 745 states have call successors, (745), 315 states have call predecessors, (745), 391 states have return successors, (1084), 809 states have call predecessors, (1084), 742 states have call successors, (1084) [2021-12-17 21:06:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 16777 transitions. [2021-12-17 21:06:28,348 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 16777 transitions. Word has length 146 [2021-12-17 21:06:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:28,349 INFO L470 AbstractCegarLoop]: Abstraction has 11058 states and 16777 transitions. [2021-12-17 21:06:28,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 16777 transitions. [2021-12-17 21:06:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:28,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:28,372 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] [2021-12-17 21:06:28,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 21:06:28,372 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:28,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1358755256, now seen corresponding path program 1 times [2021-12-17 21:06:28,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:28,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499405929] [2021-12-17 21:06:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:28,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:28,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:28,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:28,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:28,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:28,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:28,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:28,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499405929] [2021-12-17 21:06:28,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499405929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:28,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:28,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:28,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070117072] [2021-12-17 21:06:28,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:28,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:28,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:28,562 INFO L87 Difference]: Start difference. First operand 11058 states and 16777 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:32,585 INFO L93 Difference]: Finished difference Result 35475 states and 55844 transitions. [2021-12-17 21:06:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:06:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:32,705 INFO L225 Difference]: With dead ends: 35475 [2021-12-17 21:06:32,705 INFO L226 Difference]: Without dead ends: 26062 [2021-12-17 21:06:32,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:06:32,735 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 1433 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:32,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 2726 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2527 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:06:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26062 states. [2021-12-17 21:06:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26062 to 20245. [2021-12-17 21:06:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20245 states, 18307 states have (on average 1.5278308843611734) internal successors, (27970), 18384 states have internal predecessors, (27970), 1321 states have call successors, (1321), 507 states have call predecessors, (1321), 615 states have return successors, (2178), 1417 states have call predecessors, (2178), 1318 states have call successors, (2178) [2021-12-17 21:06:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20245 states to 20245 states and 31469 transitions. [2021-12-17 21:06:34,107 INFO L78 Accepts]: Start accepts. Automaton has 20245 states and 31469 transitions. Word has length 146 [2021-12-17 21:06:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:34,107 INFO L470 AbstractCegarLoop]: Abstraction has 20245 states and 31469 transitions. [2021-12-17 21:06:34,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 20245 states and 31469 transitions. [2021-12-17 21:06:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:34,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:34,122 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] [2021-12-17 21:06:34,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 21:06:34,122 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:34,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash -483720458, now seen corresponding path program 1 times [2021-12-17 21:06:34,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:34,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552831207] [2021-12-17 21:06:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:34,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:34,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:34,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:34,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:34,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:34,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:34,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:34,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552831207] [2021-12-17 21:06:34,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552831207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:34,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:34,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:34,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206869973] [2021-12-17 21:06:34,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:34,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:34,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:34,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:34,224 INFO L87 Difference]: Start difference. First operand 20245 states and 31469 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:39,364 INFO L93 Difference]: Finished difference Result 68502 states and 109290 transitions. [2021-12-17 21:06:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:06:39,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:39,539 INFO L225 Difference]: With dead ends: 68502 [2021-12-17 21:06:39,539 INFO L226 Difference]: Without dead ends: 49902 [2021-12-17 21:06:39,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:06:39,599 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 1519 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:39,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1545 Valid, 1986 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:06:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49902 states. [2021-12-17 21:06:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49902 to 38680. [2021-12-17 21:06:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38680 states, 35142 states have (on average 1.5395822662341359) internal successors, (54104), 35283 states have internal predecessors, (54104), 2473 states have call successors, (2473), 891 states have call predecessors, (2473), 1063 states have return successors, (4852), 2633 states have call predecessors, (4852), 2470 states have call successors, (4852) [2021-12-17 21:06:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38680 states to 38680 states and 61429 transitions. [2021-12-17 21:06:42,089 INFO L78 Accepts]: Start accepts. Automaton has 38680 states and 61429 transitions. Word has length 146 [2021-12-17 21:06:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:42,089 INFO L470 AbstractCegarLoop]: Abstraction has 38680 states and 61429 transitions. [2021-12-17 21:06:42,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 38680 states and 61429 transitions. [2021-12-17 21:06:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:42,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:42,111 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] [2021-12-17 21:06:42,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 21:06:42,112 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2089244152, now seen corresponding path program 1 times [2021-12-17 21:06:42,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:42,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513471172] [2021-12-17 21:06:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:42,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:42,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513471172] [2021-12-17 21:06:42,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513471172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:42,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:42,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:42,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731162275] [2021-12-17 21:06:42,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:42,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:42,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:42,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:42,227 INFO L87 Difference]: Start difference. First operand 38680 states and 61429 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:53,755 INFO L93 Difference]: Finished difference Result 151835 states and 244398 transitions. [2021-12-17 21:06:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:06:53,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:06:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:54,165 INFO L225 Difference]: With dead ends: 151835 [2021-12-17 21:06:54,165 INFO L226 Difference]: Without dead ends: 114800 [2021-12-17 21:06:54,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:06:54,290 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 1524 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 2945 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 3067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:54,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 2858 Invalid, 3067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2945 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:06:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114800 states. [2021-12-17 21:06:58,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114800 to 75293. [2021-12-17 21:06:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75293 states, 68683 states have (on average 1.5477774704075244) internal successors, (106306), 68952 states have internal predecessors, (106306), 4649 states have call successors, (4649), 1659 states have call predecessors, (4649), 1959 states have return successors, (11530), 4937 states have call predecessors, (11530), 4646 states have call successors, (11530) [2021-12-17 21:06:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75293 states to 75293 states and 122485 transitions. [2021-12-17 21:06:59,384 INFO L78 Accepts]: Start accepts. Automaton has 75293 states and 122485 transitions. Word has length 146 [2021-12-17 21:06:59,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:59,384 INFO L470 AbstractCegarLoop]: Abstraction has 75293 states and 122485 transitions. [2021-12-17 21:06:59,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:06:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand 75293 states and 122485 transitions. [2021-12-17 21:06:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:06:59,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:59,452 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] [2021-12-17 21:06:59,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 21:06:59,452 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:59,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:59,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1756601014, now seen corresponding path program 1 times [2021-12-17 21:06:59,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:59,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35975799] [2021-12-17 21:06:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:59,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:06:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:06:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:06:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:59,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:59,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35975799] [2021-12-17 21:06:59,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35975799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:59,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:59,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:59,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263866111] [2021-12-17 21:06:59,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:59,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:59,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:59,610 INFO L87 Difference]: Start difference. First operand 75293 states and 122485 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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)