./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0e49baa02682605d5c6b8a86e9e1d38b2cd4076796b3122e76d3b43b5274a0df --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:21:19,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:21:19,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:21:19,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:21:19,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:21:19,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:21:19,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:21:19,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:21:19,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:21:19,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:21:19,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:21:19,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:21:19,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:21:19,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:21:19,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:21:19,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:21:19,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:21:19,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:21:19,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:21:19,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:21:19,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:21:19,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:21:19,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:21:19,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:21:19,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:21:19,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:21:19,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:21:19,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:21:19,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:21:19,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:21:19,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:21:19,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:21:19,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:21:19,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:21:19,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:21:19,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:21:19,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:21:19,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:21:19,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:21:19,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:21:19,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:21:19,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:21:19,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:21:19,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:21:19,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:21:19,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:21:19,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:21:19,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:21:19,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:21:19,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:21:19,718 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:21:19,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:21:19,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:21:19,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:21:19,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:21:19,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:21:19,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:21:19,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:21:19,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:21:19,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:21:19,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:21:19,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:21:19,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:21:19,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:21:19,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:21:19,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:21:19,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:21:19,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:21:19,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:21:19,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:21:19,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:21:19,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:21:19,723 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:21:19,723 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:21:19,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:21:19,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:21:19,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e49baa02682605d5c6b8a86e9e1d38b2cd4076796b3122e76d3b43b5274a0df [2021-12-14 16:21:19,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:21:19,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:21:19,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:21:19,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:21:19,937 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:21:19,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c [2021-12-14 16:21:19,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e12719f/70e569b15efe498d9d3bcd447b4d1be9/FLAG5a7df1044 [2021-12-14 16:21:20,455 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:21:20,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c [2021-12-14 16:21:20,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e12719f/70e569b15efe498d9d3bcd447b4d1be9/FLAG5a7df1044 [2021-12-14 16:21:20,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e12719f/70e569b15efe498d9d3bcd447b4d1be9 [2021-12-14 16:21:20,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:21:20,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:21:20,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:21:20,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:21:20,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:21:20,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:21:20" (1/1) ... [2021-12-14 16:21:20,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9540cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:20, skipping insertion in model container [2021-12-14 16:21:20,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:21:20" (1/1) ... [2021-12-14 16:21:20,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:21:21,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:21:21,167 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c[911,924] [2021-12-14 16:21:21,243 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c[8416,8429] [2021-12-14 16:21:21,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:21:21,326 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:21:21,343 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c[911,924] [2021-12-14 16:21:21,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-1.c[8416,8429] [2021-12-14 16:21:21,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:21:21,437 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:21:21,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21 WrapperNode [2021-12-14 16:21:21,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:21:21,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:21:21,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:21:21,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:21:21,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,539 INFO L137 Inliner]: procedures = 81, calls = 101, calls flagged for inlining = 49, calls inlined = 49, statements flattened = 1141 [2021-12-14 16:21:21,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:21:21,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:21:21,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:21:21,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:21:21,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:21:21,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:21:21,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:21:21,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:21:21,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (1/1) ... [2021-12-14 16:21:21,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:21:21,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:21:21,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:21:21,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:21:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:21:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:21:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:21:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-14 16:21:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-14 16:21:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:21:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:21:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:21:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:21:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-14 16:21:21,729 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-14 16:21:21,730 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:21:21,730 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:21:21,730 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:21:21,730 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:21:21,731 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-14 16:21:21,731 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-14 16:21:21,731 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-14 16:21:21,732 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-14 16:21:21,732 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-14 16:21:21,732 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-14 16:21:21,732 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:21:21,732 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:21:21,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:21:21,732 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:21:21,733 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:21:21,733 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-14 16:21:21,733 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-14 16:21:21,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:21:21,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:21:21,733 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:21:21,734 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:21:21,734 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-14 16:21:21,734 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-14 16:21:21,847 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:21:21,848 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:21:22,547 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-14 16:21:22,547 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-14 16:21:22,604 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:21:22,614 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:21:22,614 INFO L301 CfgBuilder]: Removed 20 assume(true) statements. [2021-12-14 16:21:22,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:21:22 BoogieIcfgContainer [2021-12-14 16:21:22,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:21:22,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:21:22,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:21:22,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:21:22,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:21:20" (1/3) ... [2021-12-14 16:21:22,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7a294c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:21:22, skipping insertion in model container [2021-12-14 16:21:22,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:21:21" (2/3) ... [2021-12-14 16:21:22,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7a294c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:21:22, skipping insertion in model container [2021-12-14 16:21:22,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:21:22" (3/3) ... [2021-12-14 16:21:22,626 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.13.cil-1.c [2021-12-14 16:21:22,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:21:22,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:21:22,670 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:21:22,675 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:21:22,676 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:21:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 532 states, 469 states have (on average 1.6460554371002132) internal successors, (772), 477 states have internal predecessors, (772), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-12-14 16:21:22,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:21:22,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:22,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:22,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1984097588, now seen corresponding path program 1 times [2021-12-14 16:21:22,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:22,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291480959] [2021-12-14 16:21:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:22,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:22,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:21:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:21:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:23,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:23,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291480959] [2021-12-14 16:21:23,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291480959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:23,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:23,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:21:23,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125327936] [2021-12-14 16:21:23,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:23,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:21:23,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:23,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:21:23,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:21:23,116 INFO L87 Difference]: Start difference. First operand has 532 states, 469 states have (on average 1.6460554371002132) internal successors, (772), 477 states have internal predecessors, (772), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:24,418 INFO L93 Difference]: Finished difference Result 1185 states and 1909 transitions. [2021-12-14 16:21:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:21:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:24,444 INFO L225 Difference]: With dead ends: 1185 [2021-12-14 16:21:24,444 INFO L226 Difference]: Without dead ends: 672 [2021-12-14 16:21:24,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:21:24,462 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 954 mSDsluCounter, 2358 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 3175 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:24,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 3175 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:21:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-14 16:21:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 633. [2021-12-14 16:21:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 551 states have (on average 1.5372050816696914) internal successors, (847), 558 states have internal predecessors, (847), 58 states have call successors, (58), 22 states have call predecessors, (58), 22 states have return successors, (59), 55 states have call predecessors, (59), 54 states have call successors, (59) [2021-12-14 16:21:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 964 transitions. [2021-12-14 16:21:24,549 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 964 transitions. Word has length 65 [2021-12-14 16:21:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:24,550 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 964 transitions. [2021-12-14 16:21:24,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 964 transitions. [2021-12-14 16:21:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:21:24,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:24,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:24,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:21:24,555 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:24,556 INFO L85 PathProgramCache]: Analyzing trace with hash -631981068, now seen corresponding path program 1 times [2021-12-14 16:21:24,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:24,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031960972] [2021-12-14 16:21:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:24,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:21:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:21:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:24,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:24,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031960972] [2021-12-14 16:21:24,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031960972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:24,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:24,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:21:24,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058754414] [2021-12-14 16:21:24,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:24,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:21:24,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:21:24,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:21:24,692 INFO L87 Difference]: Start difference. First operand 633 states and 964 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 16:21:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:26,577 INFO L93 Difference]: Finished difference Result 1666 states and 2424 transitions. [2021-12-14 16:21:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:21:26,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-14 16:21:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:26,586 INFO L225 Difference]: With dead ends: 1666 [2021-12-14 16:21:26,586 INFO L226 Difference]: Without dead ends: 1445 [2021-12-14 16:21:26,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:21:26,589 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 4558 mSDsluCounter, 2082 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4580 SdHoareTripleChecker+Valid, 3020 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:26,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4580 Valid, 3020 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:21:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-12-14 16:21:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1306. [2021-12-14 16:21:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1094 states have (on average 1.4497257769652652) internal successors, (1586), 1109 states have internal predecessors, (1586), 129 states have call successors, (129), 75 states have call predecessors, (129), 81 states have return successors, (139), 123 states have call predecessors, (139), 125 states have call successors, (139) [2021-12-14 16:21:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1854 transitions. [2021-12-14 16:21:26,679 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1854 transitions. Word has length 65 [2021-12-14 16:21:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:26,680 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 1854 transitions. [2021-12-14 16:21:26,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 16:21:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1854 transitions. [2021-12-14 16:21:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:21:26,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:26,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:26,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:21:26,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1785973121, now seen corresponding path program 1 times [2021-12-14 16:21:26,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:26,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133568135] [2021-12-14 16:21:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:26,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:26,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:26,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:26,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:26,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:26,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:26,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 16:21:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:26,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:21:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:26,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:26,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133568135] [2021-12-14 16:21:26,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133568135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:26,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:26,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:21:26,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878391286] [2021-12-14 16:21:26,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:26,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:21:26,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:26,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:21:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:26,880 INFO L87 Difference]: Start difference. First operand 1306 states and 1854 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:28,014 INFO L93 Difference]: Finished difference Result 2332 states and 3248 transitions. [2021-12-14 16:21:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:21:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-14 16:21:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:28,022 INFO L225 Difference]: With dead ends: 2332 [2021-12-14 16:21:28,022 INFO L226 Difference]: Without dead ends: 1444 [2021-12-14 16:21:28,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:28,026 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 709 mSDsluCounter, 2936 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 3727 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:28,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 3727 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:21:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-12-14 16:21:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1336. [2021-12-14 16:21:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1118 states have (on average 1.4373881932021466) internal successors, (1607), 1133 states have internal predecessors, (1607), 129 states have call successors, (129), 75 states have call predecessors, (129), 87 states have return successors, (145), 129 states have call predecessors, (145), 125 states have call successors, (145) [2021-12-14 16:21:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1881 transitions. [2021-12-14 16:21:28,088 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1881 transitions. Word has length 66 [2021-12-14 16:21:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:28,089 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 1881 transitions. [2021-12-14 16:21:28,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1881 transitions. [2021-12-14 16:21:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:21:28,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:28,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:28,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:21:28,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:28,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1479634877, now seen corresponding path program 1 times [2021-12-14 16:21:28,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:28,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758908045] [2021-12-14 16:21:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:28,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 16:21:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:21:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:28,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:28,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758908045] [2021-12-14 16:21:28,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758908045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:28,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:28,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:21:28,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940528859] [2021-12-14 16:21:28,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:28,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:21:28,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:28,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:21:28,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:21:28,198 INFO L87 Difference]: Start difference. First operand 1336 states and 1881 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:21:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:30,073 INFO L93 Difference]: Finished difference Result 3674 states and 5068 transitions. [2021-12-14 16:21:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:21:30,074 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-14 16:21:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:30,081 INFO L225 Difference]: With dead ends: 3674 [2021-12-14 16:21:30,081 INFO L226 Difference]: Without dead ends: 1579 [2021-12-14 16:21:30,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:21:30,086 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 4149 mSDsluCounter, 2578 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4171 SdHoareTripleChecker+Valid, 3500 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:30,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4171 Valid, 3500 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:21:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-12-14 16:21:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1424. [2021-12-14 16:21:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1171 states have (on average 1.403928266438941) internal successors, (1644), 1186 states have internal predecessors, (1644), 149 states have call successors, (149), 89 states have call predecessors, (149), 102 states have return successors, (166), 150 states have call predecessors, (166), 145 states have call successors, (166) [2021-12-14 16:21:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 1959 transitions. [2021-12-14 16:21:30,146 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 1959 transitions. Word has length 66 [2021-12-14 16:21:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:30,147 INFO L470 AbstractCegarLoop]: Abstraction has 1424 states and 1959 transitions. [2021-12-14 16:21:30,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 16:21:30,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 1959 transitions. [2021-12-14 16:21:30,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:21:30,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:30,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:30,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:21:30,149 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash 414689489, now seen corresponding path program 1 times [2021-12-14 16:21:30,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:30,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975962654] [2021-12-14 16:21:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:30,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:30,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:30,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:30,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:30,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:30,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:30,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:30,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:30,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:21:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:21:30,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:30,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975962654] [2021-12-14 16:21:30,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975962654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:30,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:30,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:21:30,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861365352] [2021-12-14 16:21:30,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:30,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:21:30,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:21:30,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:30,294 INFO L87 Difference]: Start difference. First operand 1424 states and 1959 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:31,318 INFO L93 Difference]: Finished difference Result 2601 states and 3510 transitions. [2021-12-14 16:21:31,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:21:31,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-14 16:21:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:31,326 INFO L225 Difference]: With dead ends: 2601 [2021-12-14 16:21:31,327 INFO L226 Difference]: Without dead ends: 1595 [2021-12-14 16:21:31,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:21:31,330 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 1044 mSDsluCounter, 2518 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 3297 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:31,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 3297 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:21:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-12-14 16:21:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1464. [2021-12-14 16:21:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1203 states have (on average 1.3906899418121363) internal successors, (1673), 1218 states have internal predecessors, (1673), 149 states have call successors, (149), 89 states have call predecessors, (149), 110 states have return successors, (174), 158 states have call predecessors, (174), 145 states have call successors, (174) [2021-12-14 16:21:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1996 transitions. [2021-12-14 16:21:31,408 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1996 transitions. Word has length 91 [2021-12-14 16:21:31,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:31,409 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 1996 transitions. [2021-12-14 16:21:31,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:21:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1996 transitions. [2021-12-14 16:21:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:21:31,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:31,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:31,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:21:31,415 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash 858590163, now seen corresponding path program 1 times [2021-12-14 16:21:31,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:31,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577099644] [2021-12-14 16:21:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:31,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:21:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:21:31,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:31,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577099644] [2021-12-14 16:21:31,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577099644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:31,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:31,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:31,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222808134] [2021-12-14 16:21:31,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:31,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:31,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:31,516 INFO L87 Difference]: Start difference. First operand 1464 states and 1996 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:21:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:32,001 INFO L93 Difference]: Finished difference Result 3781 states and 5032 transitions. [2021-12-14 16:21:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:21:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-14 16:21:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:32,015 INFO L225 Difference]: With dead ends: 3781 [2021-12-14 16:21:32,015 INFO L226 Difference]: Without dead ends: 2736 [2021-12-14 16:21:32,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:21:32,021 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 2233 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2268 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:32,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2268 Valid, 1595 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:21:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-12-14 16:21:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2506. [2021-12-14 16:21:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2016 states have (on average 1.337797619047619) internal successors, (2697), 2050 states have internal predecessors, (2697), 266 states have call successors, (266), 170 states have call predecessors, (266), 222 states have return successors, (371), 288 states have call predecessors, (371), 262 states have call successors, (371) [2021-12-14 16:21:32,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3334 transitions. [2021-12-14 16:21:32,123 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3334 transitions. Word has length 91 [2021-12-14 16:21:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:32,123 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 3334 transitions. [2021-12-14 16:21:32,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-14 16:21:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3334 transitions. [2021-12-14 16:21:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:21:32,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:32,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:32,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:21:32,126 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:32,127 INFO L85 PathProgramCache]: Analyzing trace with hash -199247915, now seen corresponding path program 1 times [2021-12-14 16:21:32,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:32,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282293530] [2021-12-14 16:21:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:32,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-14 16:21:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:21:32,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:32,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282293530] [2021-12-14 16:21:32,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282293530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:32,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:32,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:21:32,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548536953] [2021-12-14 16:21:32,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:32,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:21:32,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:21:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:21:32,193 INFO L87 Difference]: Start difference. First operand 2506 states and 3334 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:32,868 INFO L93 Difference]: Finished difference Result 3670 states and 4798 transitions. [2021-12-14 16:21:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:21:32,869 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), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-14 16:21:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:32,879 INFO L225 Difference]: With dead ends: 3670 [2021-12-14 16:21:32,880 INFO L226 Difference]: Without dead ends: 1583 [2021-12-14 16:21:32,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:32,885 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 820 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:32,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 2212 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:21:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-12-14 16:21:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1464. [2021-12-14 16:21:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1203 states have (on average 1.368246051537822) internal successors, (1646), 1218 states have internal predecessors, (1646), 149 states have call successors, (149), 89 states have call predecessors, (149), 110 states have return successors, (174), 158 states have call predecessors, (174), 145 states have call successors, (174) [2021-12-14 16:21:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1969 transitions. [2021-12-14 16:21:32,940 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1969 transitions. Word has length 91 [2021-12-14 16:21:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:32,941 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 1969 transitions. [2021-12-14 16:21:32,941 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), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:21:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1969 transitions. [2021-12-14 16:21:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 16:21:32,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:32,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:32,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:21:32,943 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1459676537, now seen corresponding path program 1 times [2021-12-14 16:21:32,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:32,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879486552] [2021-12-14 16:21:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:32,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:32,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 16:21:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:21:33,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:33,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879486552] [2021-12-14 16:21:33,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879486552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:33,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:33,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:21:33,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471579264] [2021-12-14 16:21:33,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:33,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:21:33,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:21:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:21:33,046 INFO L87 Difference]: Start difference. First operand 1464 states and 1969 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:21:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:34,503 INFO L93 Difference]: Finished difference Result 3599 states and 4703 transitions. [2021-12-14 16:21:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 16:21:34,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-14 16:21:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:34,513 INFO L225 Difference]: With dead ends: 3599 [2021-12-14 16:21:34,514 INFO L226 Difference]: Without dead ends: 2395 [2021-12-14 16:21:34,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-14 16:21:34,517 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 2653 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2699 SdHoareTripleChecker+Valid, 2869 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:34,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2699 Valid, 2869 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:21:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-12-14 16:21:34,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2205. [2021-12-14 16:21:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 1769 states have (on average 1.3126059920859243) internal successors, (2322), 1795 states have internal predecessors, (2322), 236 states have call successors, (236), 145 states have call predecessors, (236), 198 states have return successors, (320), 266 states have call predecessors, (320), 232 states have call successors, (320) [2021-12-14 16:21:34,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 2878 transitions. [2021-12-14 16:21:34,602 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 2878 transitions. Word has length 92 [2021-12-14 16:21:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:34,603 INFO L470 AbstractCegarLoop]: Abstraction has 2205 states and 2878 transitions. [2021-12-14 16:21:34,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:21:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 2878 transitions. [2021-12-14 16:21:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 16:21:34,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:34,606 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:34,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:21:34,606 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:34,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1760478952, now seen corresponding path program 1 times [2021-12-14 16:21:34,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:34,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051991698] [2021-12-14 16:21:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:34,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 16:21:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:21:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 16:21:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 16:21:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 16:21:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 16:21:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-14 16:21:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-14 16:21:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-14 16:21:34,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051991698] [2021-12-14 16:21:34,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051991698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:21:34,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441205364] [2021-12-14 16:21:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:34,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:21:34,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:21:34,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:21:34,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:21:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:34,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:21:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:21:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 16:21:35,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:21:35,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441205364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:35,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:21:35,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-14 16:21:35,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130466075] [2021-12-14 16:21:35,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:35,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:21:35,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:21:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:35,267 INFO L87 Difference]: Start difference. First operand 2205 states and 2878 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:21:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:35,379 INFO L93 Difference]: Finished difference Result 5550 states and 7020 transitions. [2021-12-14 16:21:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:21:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2021-12-14 16:21:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:35,395 INFO L225 Difference]: With dead ends: 5550 [2021-12-14 16:21:35,395 INFO L226 Difference]: Without dead ends: 3840 [2021-12-14 16:21:35,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:35,402 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 61 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:35,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1577 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:21:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2021-12-14 16:21:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 3803. [2021-12-14 16:21:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3013 states have (on average 1.2731496846996349) internal successors, (3836), 3059 states have internal predecessors, (3836), 413 states have call successors, (413), 282 states have call predecessors, (413), 375 states have return successors, (549), 463 states have call predecessors, (549), 409 states have call successors, (549) [2021-12-14 16:21:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 4798 transitions. [2021-12-14 16:21:35,586 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 4798 transitions. Word has length 163 [2021-12-14 16:21:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:35,588 INFO L470 AbstractCegarLoop]: Abstraction has 3803 states and 4798 transitions. [2021-12-14 16:21:35,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 16:21:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 4798 transitions. [2021-12-14 16:21:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-14 16:21:35,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:35,592 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:35,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 16:21:35,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:21:35,810 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:35,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1817064887, now seen corresponding path program 1 times [2021-12-14 16:21:35,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:35,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203439056] [2021-12-14 16:21:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:35,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 16:21:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:21:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 16:21:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 16:21:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 16:21:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 16:21:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 16:21:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-14 16:21:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-14 16:21:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-14 16:21:35,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:35,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203439056] [2021-12-14 16:21:35,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203439056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:21:35,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235840489] [2021-12-14 16:21:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:35,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:21:35,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:21:35,969 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) [2021-12-14 16:21:35,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:21:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:36,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:21:36,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:21:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-14 16:21:36,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:21:36,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235840489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:36,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:21:36,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-14 16:21:36,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835875371] [2021-12-14 16:21:36,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:36,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:21:36,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:21:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:36,580 INFO L87 Difference]: Start difference. First operand 3803 states and 4798 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 16:21:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:36,789 INFO L93 Difference]: Finished difference Result 10571 states and 13068 transitions. [2021-12-14 16:21:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:21:36,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 195 [2021-12-14 16:21:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:36,823 INFO L225 Difference]: With dead ends: 10571 [2021-12-14 16:21:36,823 INFO L226 Difference]: Without dead ends: 7187 [2021-12-14 16:21:36,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:36,835 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 52 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:36,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1577 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:21:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2021-12-14 16:21:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 7177. [2021-12-14 16:21:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 5640 states have (on average 1.2459219858156028) internal successors, (7027), 5727 states have internal predecessors, (7027), 791 states have call successors, (791), 556 states have call predecessors, (791), 744 states have return successors, (1067), 895 states have call predecessors, (1067), 787 states have call successors, (1067) [2021-12-14 16:21:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 8885 transitions. [2021-12-14 16:21:37,126 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 8885 transitions. Word has length 195 [2021-12-14 16:21:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:37,127 INFO L470 AbstractCegarLoop]: Abstraction has 7177 states and 8885 transitions. [2021-12-14 16:21:37,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 16:21:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 8885 transitions. [2021-12-14 16:21:37,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-14 16:21:37,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:37,163 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:37,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:21:37,363 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,SelfDestructingSolverStorable9 [2021-12-14 16:21:37,364 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1580509131, now seen corresponding path program 1 times [2021-12-14 16:21:37,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:37,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696704291] [2021-12-14 16:21:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:37,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:21:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 16:21:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 16:21:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:21:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 16:21:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 16:21:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 16:21:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 16:21:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:21:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 16:21:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 16:21:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 16:21:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:21:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:21:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-14 16:21:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-14 16:21:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-14 16:21:37,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:37,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696704291] [2021-12-14 16:21:37,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696704291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:21:37,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538260064] [2021-12-14 16:21:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:37,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:21:37,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:21:37,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:21:37,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:21:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:21:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:21:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-14 16:21:38,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:21:38,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538260064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:38,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:21:38,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-14 16:21:38,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489679318] [2021-12-14 16:21:38,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:38,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:21:38,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:21:38,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:38,079 INFO L87 Difference]: Start difference. First operand 7177 states and 8885 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-14 16:21:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:38,337 INFO L93 Difference]: Finished difference Result 12611 states and 15779 transitions. [2021-12-14 16:21:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:21:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 195 [2021-12-14 16:21:38,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:38,343 INFO L225 Difference]: With dead ends: 12611 [2021-12-14 16:21:38,343 INFO L226 Difference]: Without dead ends: 410 [2021-12-14 16:21:38,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:38,369 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 673 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:38,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 777 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:21:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-14 16:21:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-12-14 16:21:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.585561497326203) internal successors, (593), 376 states have internal predecessors, (593), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 16:21:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 649 transitions. [2021-12-14 16:21:38,389 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 649 transitions. Word has length 195 [2021-12-14 16:21:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:38,390 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 649 transitions. [2021-12-14 16:21:38,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-14 16:21:38,391 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 649 transitions. [2021-12-14 16:21:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:21:38,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:38,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:38,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:21:38,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:21:38,608 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:38,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1535088010, now seen corresponding path program 1 times [2021-12-14 16:21:38,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:38,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669109229] [2021-12-14 16:21:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:38,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:21:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:21:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:21:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:21:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:38,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:38,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669109229] [2021-12-14 16:21:38,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669109229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:38,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:38,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:21:38,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374201996] [2021-12-14 16:21:38,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:38,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:21:38,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:21:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:21:38,782 INFO L87 Difference]: Start difference. First operand 410 states and 649 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:40,079 INFO L93 Difference]: Finished difference Result 961 states and 1543 transitions. [2021-12-14 16:21:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:21:40,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-14 16:21:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:40,082 INFO L225 Difference]: With dead ends: 961 [2021-12-14 16:21:40,082 INFO L226 Difference]: Without dead ends: 563 [2021-12-14 16:21:40,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:21:40,084 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 1114 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:40,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1139 Valid, 1172 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:21:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-14 16:21:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 410. [2021-12-14 16:21:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.5828877005347595) internal successors, (592), 376 states have internal predecessors, (592), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 16:21:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 648 transitions. [2021-12-14 16:21:40,105 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 648 transitions. Word has length 190 [2021-12-14 16:21:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:40,106 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 648 transitions. [2021-12-14 16:21:40,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 648 transitions. [2021-12-14 16:21:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:21:40,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:40,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:40,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:21:40,108 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:40,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1160730228, now seen corresponding path program 1 times [2021-12-14 16:21:40,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:40,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999465948] [2021-12-14 16:21:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:40,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:40,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:40,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:21:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:40,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:21:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:40,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:21:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:40,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:21:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:40,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:40,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999465948] [2021-12-14 16:21:40,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999465948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:40,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:40,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:21:40,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731567244] [2021-12-14 16:21:40,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:40,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:21:40,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:21:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:21:40,260 INFO L87 Difference]: Start difference. First operand 410 states and 648 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:41,520 INFO L93 Difference]: Finished difference Result 953 states and 1526 transitions. [2021-12-14 16:21:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:21:41,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-14 16:21:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:41,523 INFO L225 Difference]: With dead ends: 953 [2021-12-14 16:21:41,523 INFO L226 Difference]: Without dead ends: 563 [2021-12-14 16:21:41,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:21:41,525 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 1105 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:41,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 1170 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:21:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-14 16:21:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 410. [2021-12-14 16:21:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.5802139037433156) internal successors, (591), 376 states have internal predecessors, (591), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 16:21:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 647 transitions. [2021-12-14 16:21:41,548 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 647 transitions. Word has length 190 [2021-12-14 16:21:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:41,548 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 647 transitions. [2021-12-14 16:21:41,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 647 transitions. [2021-12-14 16:21:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:21:41,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:41,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:41,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:21:41,551 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1070669938, now seen corresponding path program 1 times [2021-12-14 16:21:41,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:41,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104197985] [2021-12-14 16:21:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:41,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:41,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:41,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:21:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:41,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:21:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:41,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:21:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:41,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:21:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:41,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:41,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104197985] [2021-12-14 16:21:41,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104197985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:41,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:41,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:21:41,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081758098] [2021-12-14 16:21:41,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:41,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:21:41,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:21:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:21:41,697 INFO L87 Difference]: Start difference. First operand 410 states and 647 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:44,411 INFO L93 Difference]: Finished difference Result 1512 states and 2438 transitions. [2021-12-14 16:21:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:21:44,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 190 [2021-12-14 16:21:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:44,417 INFO L225 Difference]: With dead ends: 1512 [2021-12-14 16:21:44,417 INFO L226 Difference]: Without dead ends: 1124 [2021-12-14 16:21:44,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:44,419 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 1683 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:44,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1703 Valid, 1881 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-14 16:21:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-12-14 16:21:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 817. [2021-12-14 16:21:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 752 states have (on average 1.5930851063829787) internal successors, (1198), 755 states have internal predecessors, (1198), 51 states have call successors, (51), 13 states have call predecessors, (51), 13 states have return successors, (52), 49 states have call predecessors, (52), 49 states have call successors, (52) [2021-12-14 16:21:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1301 transitions. [2021-12-14 16:21:44,464 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1301 transitions. Word has length 190 [2021-12-14 16:21:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:44,465 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1301 transitions. [2021-12-14 16:21:44,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1301 transitions. [2021-12-14 16:21:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:21:44,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:44,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:44,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:21:44,467 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:44,468 INFO L85 PathProgramCache]: Analyzing trace with hash -776356498, now seen corresponding path program 1 times [2021-12-14 16:21:44,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:44,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93103167] [2021-12-14 16:21:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:44,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:21:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:21:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:21:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:21:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:44,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:44,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93103167] [2021-12-14 16:21:44,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93103167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:44,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:44,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:44,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479674438] [2021-12-14 16:21:44,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:44,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:44,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:44,623 INFO L87 Difference]: Start difference. First operand 817 states and 1301 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:48,060 INFO L93 Difference]: Finished difference Result 2500 states and 4041 transitions. [2021-12-14 16:21:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:21:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:48,067 INFO L225 Difference]: With dead ends: 2500 [2021-12-14 16:21:48,067 INFO L226 Difference]: Without dead ends: 1705 [2021-12-14 16:21:48,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:48,070 INFO L933 BasicCegarLoop]: 1105 mSDtfsCounter, 1714 mSDsluCounter, 2154 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1734 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 3382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:48,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1734 Valid, 3259 Invalid, 3382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-14 16:21:48,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-12-14 16:21:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1195. [2021-12-14 16:21:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1101 states have (on average 1.586739327883742) internal successors, (1747), 1105 states have internal predecessors, (1747), 73 states have call successors, (73), 19 states have call predecessors, (73), 20 states have return successors, (76), 72 states have call predecessors, (76), 71 states have call successors, (76) [2021-12-14 16:21:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1896 transitions. [2021-12-14 16:21:48,162 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1896 transitions. Word has length 190 [2021-12-14 16:21:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:48,162 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1896 transitions. [2021-12-14 16:21:48,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1896 transitions. [2021-12-14 16:21:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:21:48,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:48,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:48,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:21:48,165 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:48,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1595360368, now seen corresponding path program 1 times [2021-12-14 16:21:48,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:48,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935962870] [2021-12-14 16:21:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:48,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:21:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:21:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:21:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:21:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:48,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935962870] [2021-12-14 16:21:48,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935962870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:48,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:48,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:48,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557632189] [2021-12-14 16:21:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:48,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:48,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:48,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:48,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:48,361 INFO L87 Difference]: Start difference. First operand 1195 states and 1896 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:50,040 INFO L93 Difference]: Finished difference Result 2898 states and 4684 transitions. [2021-12-14 16:21:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:21:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:50,046 INFO L225 Difference]: With dead ends: 2898 [2021-12-14 16:21:50,046 INFO L226 Difference]: Without dead ends: 1725 [2021-12-14 16:21:50,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:50,049 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 1213 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:50,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 1741 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:21:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-12-14 16:21:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1195. [2021-12-14 16:21:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1101 states have (on average 1.5840145322434152) internal successors, (1744), 1105 states have internal predecessors, (1744), 73 states have call successors, (73), 19 states have call predecessors, (73), 20 states have return successors, (76), 72 states have call predecessors, (76), 71 states have call successors, (76) [2021-12-14 16:21:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1893 transitions. [2021-12-14 16:21:50,122 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1893 transitions. Word has length 190 [2021-12-14 16:21:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:50,122 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1893 transitions. [2021-12-14 16:21:50,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1893 transitions. [2021-12-14 16:21:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:21:50,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:50,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:50,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:21:50,125 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash -129247954, now seen corresponding path program 1 times [2021-12-14 16:21:50,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:50,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452582230] [2021-12-14 16:21:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:50,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:21:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:21:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:21:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:21:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:50,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:50,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452582230] [2021-12-14 16:21:50,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452582230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:50,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:50,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:50,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467302381] [2021-12-14 16:21:50,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:50,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:50,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:50,271 INFO L87 Difference]: Start difference. First operand 1195 states and 1893 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:52,078 INFO L93 Difference]: Finished difference Result 2894 states and 4668 transitions. [2021-12-14 16:21:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:21:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:21:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:52,085 INFO L225 Difference]: With dead ends: 2894 [2021-12-14 16:21:52,085 INFO L226 Difference]: Without dead ends: 1721 [2021-12-14 16:21:52,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:21:52,089 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1211 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:52,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 1737 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:21:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-12-14 16:21:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1195. [2021-12-14 16:21:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1101 states have (on average 1.581289736603088) internal successors, (1741), 1105 states have internal predecessors, (1741), 73 states have call successors, (73), 19 states have call predecessors, (73), 20 states have return successors, (76), 72 states have call predecessors, (76), 71 states have call successors, (76) [2021-12-14 16:21:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1890 transitions. [2021-12-14 16:21:52,193 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1890 transitions. Word has length 190 [2021-12-14 16:21:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:52,194 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1890 transitions. [2021-12-14 16:21:52,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1890 transitions. [2021-12-14 16:21:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:21:52,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:52,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:52,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:21:52,197 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:52,197 INFO L85 PathProgramCache]: Analyzing trace with hash 369308848, now seen corresponding path program 1 times [2021-12-14 16:21:52,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:52,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940866306] [2021-12-14 16:21:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:52,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:21:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:21:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:21:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:21:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:52,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:52,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940866306] [2021-12-14 16:21:52,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940866306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:52,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:52,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:52,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255628805] [2021-12-14 16:21:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:52,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:52,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:52,363 INFO L87 Difference]: Start difference. First operand 1195 states and 1890 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:55,722 INFO L93 Difference]: Finished difference Result 3946 states and 6338 transitions. [2021-12-14 16:21:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:21:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:55,739 INFO L225 Difference]: With dead ends: 3946 [2021-12-14 16:21:55,740 INFO L226 Difference]: Without dead ends: 2773 [2021-12-14 16:21:55,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:55,745 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1698 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 3233 SdHoareTripleChecker+Invalid, 3355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:55,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1718 Valid, 3233 Invalid, 3355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-14 16:21:55,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-12-14 16:21:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 1956. [2021-12-14 16:21:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1804 states have (on average 1.5753880266075388) internal successors, (2842), 1810 states have internal predecessors, (2842), 117 states have call successors, (117), 31 states have call predecessors, (117), 34 states have return successors, (128), 118 states have call predecessors, (128), 115 states have call successors, (128) [2021-12-14 16:21:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3087 transitions. [2021-12-14 16:21:55,884 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3087 transitions. Word has length 190 [2021-12-14 16:21:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:55,884 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 3087 transitions. [2021-12-14 16:21:55,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3087 transitions. [2021-12-14 16:21:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:21:55,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:55,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:55,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:21:55,888 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:55,888 INFO L85 PathProgramCache]: Analyzing trace with hash 939580654, now seen corresponding path program 1 times [2021-12-14 16:21:55,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:55,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936293872] [2021-12-14 16:21:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:55,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:55,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:55,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:21:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:56,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:21:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:56,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:21:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:56,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:21:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:56,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936293872] [2021-12-14 16:21:56,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936293872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:56,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:56,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:56,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392251678] [2021-12-14 16:21:56,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:56,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:56,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:56,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:56,044 INFO L87 Difference]: Start difference. First operand 1956 states and 3087 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:21:59,481 INFO L93 Difference]: Finished difference Result 6741 states and 10785 transitions. [2021-12-14 16:21:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:21:59,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:21:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:21:59,495 INFO L225 Difference]: With dead ends: 6741 [2021-12-14 16:21:59,495 INFO L226 Difference]: Without dead ends: 4807 [2021-12-14 16:21:59,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:21:59,501 INFO L933 BasicCegarLoop]: 1075 mSDtfsCounter, 1693 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 3248 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 3225 SdHoareTripleChecker+Invalid, 3336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:21:59,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 3225 Invalid, 3336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3248 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-14 16:21:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-12-14 16:21:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 3481. [2021-12-14 16:21:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3213 states have (on average 1.5711173358232182) internal successors, (5048), 3223 states have internal predecessors, (5048), 205 states have call successors, (205), 55 states have call predecessors, (205), 62 states have return successors, (238), 210 states have call predecessors, (238), 203 states have call successors, (238) [2021-12-14 16:21:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5491 transitions. [2021-12-14 16:21:59,783 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5491 transitions. Word has length 190 [2021-12-14 16:21:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:21:59,783 INFO L470 AbstractCegarLoop]: Abstraction has 3481 states and 5491 transitions. [2021-12-14 16:21:59,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:21:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5491 transitions. [2021-12-14 16:21:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:21:59,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:21:59,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:21:59,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:21:59,787 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:21:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:21:59,787 INFO L85 PathProgramCache]: Analyzing trace with hash 153582764, now seen corresponding path program 1 times [2021-12-14 16:21:59,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:21:59,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208902832] [2021-12-14 16:21:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:21:59,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:21:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:59,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:21:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:59,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:21:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:59,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:21:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:59,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:21:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:21:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:21:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:21:59,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:21:59,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208902832] [2021-12-14 16:21:59,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208902832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:21:59,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:21:59,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:21:59,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464864387] [2021-12-14 16:21:59,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:21:59,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:21:59,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:21:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:21:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:21:59,945 INFO L87 Difference]: Start difference. First operand 3481 states and 5491 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:03,348 INFO L93 Difference]: Finished difference Result 12338 states and 19707 transitions. [2021-12-14 16:22:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:22:03,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:22:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:03,378 INFO L225 Difference]: With dead ends: 12338 [2021-12-14 16:22:03,378 INFO L226 Difference]: Without dead ends: 8879 [2021-12-14 16:22:03,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:22:03,388 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 1807 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 2880 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1827 SdHoareTripleChecker+Valid, 2227 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:03,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1827 Valid, 2227 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2880 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 16:22:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8879 states. [2021-12-14 16:22:03,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8879 to 6536. [2021-12-14 16:22:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 6036 states have (on average 1.568257123923128) internal successors, (9466), 6054 states have internal predecessors, (9466), 381 states have call successors, (381), 103 states have call predecessors, (381), 118 states have return successors, (476), 394 states have call predecessors, (476), 379 states have call successors, (476) [2021-12-14 16:22:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 10323 transitions. [2021-12-14 16:22:03,909 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 10323 transitions. Word has length 190 [2021-12-14 16:22:03,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:03,909 INFO L470 AbstractCegarLoop]: Abstraction has 6536 states and 10323 transitions. [2021-12-14 16:22:03,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 10323 transitions. [2021-12-14 16:22:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:22:03,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:03,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:03,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:22:03,915 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:03,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:03,916 INFO L85 PathProgramCache]: Analyzing trace with hash 820964654, now seen corresponding path program 1 times [2021-12-14 16:22:03,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:03,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091629697] [2021-12-14 16:22:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:03,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:03,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:03,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:22:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:04,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:22:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:04,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:22:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:04,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:22:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:04,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:04,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091629697] [2021-12-14 16:22:04,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091629697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:04,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:04,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:04,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086918277] [2021-12-14 16:22:04,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:04,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:04,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:04,061 INFO L87 Difference]: Start difference. First operand 6536 states and 10323 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:08,036 INFO L93 Difference]: Finished difference Result 23531 states and 37609 transitions. [2021-12-14 16:22:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:22:08,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:22:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:08,091 INFO L225 Difference]: With dead ends: 23531 [2021-12-14 16:22:08,091 INFO L226 Difference]: Without dead ends: 17017 [2021-12-14 16:22:08,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:22:08,110 INFO L933 BasicCegarLoop]: 1065 mSDtfsCounter, 1691 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 3232 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 3215 SdHoareTripleChecker+Invalid, 3320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:08,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 3215 Invalid, 3320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3232 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-14 16:22:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17017 states. [2021-12-14 16:22:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17017 to 12661. [2021-12-14 16:22:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12661 states, 11697 states have (on average 1.56655552705822) internal successors, (18324), 11731 states have internal predecessors, (18324), 733 states have call successors, (733), 199 states have call predecessors, (733), 230 states have return successors, (1006), 762 states have call predecessors, (1006), 731 states have call successors, (1006) [2021-12-14 16:22:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12661 states to 12661 states and 20063 transitions. [2021-12-14 16:22:09,115 INFO L78 Accepts]: Start accepts. Automaton has 12661 states and 20063 transitions. Word has length 190 [2021-12-14 16:22:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:09,115 INFO L470 AbstractCegarLoop]: Abstraction has 12661 states and 20063 transitions. [2021-12-14 16:22:09,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 12661 states and 20063 transitions. [2021-12-14 16:22:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:22:09,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:09,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:09,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:22:09,122 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:09,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1374264212, now seen corresponding path program 1 times [2021-12-14 16:22:09,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:09,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417159775] [2021-12-14 16:22:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:09,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:22:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:22:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:22:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:22:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:09,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:09,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417159775] [2021-12-14 16:22:09,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417159775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:09,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:09,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:09,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277420994] [2021-12-14 16:22:09,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:09,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:09,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:09,256 INFO L87 Difference]: Start difference. First operand 12661 states and 20063 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:22:12,008 INFO L93 Difference]: Finished difference Result 29905 states and 48054 transitions. [2021-12-14 16:22:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:22:12,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-14 16:22:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:22:12,056 INFO L225 Difference]: With dead ends: 29905 [2021-12-14 16:22:12,056 INFO L226 Difference]: Without dead ends: 17266 [2021-12-14 16:22:12,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:22:12,080 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 1214 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 16:22:12,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 1717 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 16:22:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17266 states. [2021-12-14 16:22:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17266 to 12661. [2021-12-14 16:22:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12661 states, 11697 states have (on average 1.563734290843806) internal successors, (18291), 11731 states have internal predecessors, (18291), 733 states have call successors, (733), 199 states have call predecessors, (733), 230 states have return successors, (1006), 762 states have call predecessors, (1006), 731 states have call successors, (1006) [2021-12-14 16:22:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12661 states to 12661 states and 20030 transitions. [2021-12-14 16:22:13,147 INFO L78 Accepts]: Start accepts. Automaton has 12661 states and 20030 transitions. Word has length 190 [2021-12-14 16:22:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:22:13,147 INFO L470 AbstractCegarLoop]: Abstraction has 12661 states and 20030 transitions. [2021-12-14 16:22:13,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:22:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 12661 states and 20030 transitions. [2021-12-14 16:22:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-14 16:22:13,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:22:13,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:22:13,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:22:13,162 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:22:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:22:13,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1029436050, now seen corresponding path program 1 times [2021-12-14 16:22:13,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:22:13,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665517119] [2021-12-14 16:22:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:22:13,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:22:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:13,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:22:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:13,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:22:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:13,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 16:22:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:13,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-14 16:22:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:13,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 16:22:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:22:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:22:13,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:22:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665517119] [2021-12-14 16:22:13,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665517119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:22:13,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:22:13,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:22:13,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058103983] [2021-12-14 16:22:13,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:22:13,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:22:13,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:22:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:22:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:22:13,329 INFO L87 Difference]: Start difference. First operand 12661 states and 20030 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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)