./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:50:38,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:50:38,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:50:38,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:50:38,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:50:38,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:50:38,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:50:38,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:50:38,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:50:38,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:50:38,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:50:38,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:50:38,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:50:38,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:50:38,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:50:38,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:50:38,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:50:38,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:50:38,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:50:38,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:50:38,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:50:38,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:50:38,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:50:38,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:50:38,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:50:38,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:50:38,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:50:38,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:50:38,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:50:38,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:50:38,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:50:38,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:50:38,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:50:38,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:50:38,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:50:38,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:50:38,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:50:38,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:50:38,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:50:38,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:50:38,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:50:38,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:50:38,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:50:38,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:50:38,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:50:38,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:50:38,706 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:50:38,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:50:38,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:50:38,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:50:38,708 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:50:38,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:50:38,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:50:38,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:50:38,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:50:38,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:50:38,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:50:38,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:50:38,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:50:38,711 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:50:38,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:50:38,711 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:50:38,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:50:38,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:50:38,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:50:38,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:50:38,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:50:38,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:50:38,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:50:38,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:50:38,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:50:38,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:50:38,715 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:50:38,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:50:38,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:50:38,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:50:38,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce [2021-12-21 14:50:38,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:50:38,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:50:38,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:50:38,930 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:50:38,930 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:50:38,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2021-12-21 14:50:38,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31662b7f0/6180e89bc2d3402784c16d59a7d780df/FLAG965078baf [2021-12-21 14:50:39,452 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:50:39,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2021-12-21 14:50:39,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31662b7f0/6180e89bc2d3402784c16d59a7d780df/FLAG965078baf [2021-12-21 14:50:39,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31662b7f0/6180e89bc2d3402784c16d59a7d780df [2021-12-21 14:50:39,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:50:39,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:50:39,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:50:39,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:50:39,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:50:39,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:39,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c7cd52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39, skipping insertion in model container [2021-12-21 14:50:39,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:39,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:50:39,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:50:39,679 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c[913,926] [2021-12-21 14:50:39,714 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c[5977,5990] [2021-12-21 14:50:39,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:50:39,830 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:50:39,851 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c[913,926] [2021-12-21 14:50:39,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c[5977,5990] [2021-12-21 14:50:39,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:50:39,939 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:50:39,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39 WrapperNode [2021-12-21 14:50:39,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:50:39,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:50:39,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:50:39,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:50:39,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:39,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:40,044 INFO L137 Inliner]: procedures = 72, calls = 85, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1058 [2021-12-21 14:50:40,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:50:40,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:50:40,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:50:40,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:50:40,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:40,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:40,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:40,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:40,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:40,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:40,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:40,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:50:40,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:50:40,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:50:40,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:50:40,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (1/1) ... [2021-12-21 14:50:40,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:50:40,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:40,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 14:50:40,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 14:50:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:50:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:50:40,159 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:50:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-21 14:50:40,159 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-21 14:50:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:50:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:50:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:50:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:50:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:50:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:50:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:50:40,160 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:50:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:50:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:50:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:50:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:50:40,161 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:50:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:50:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:50:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:50:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:50:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-21 14:50:40,162 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-21 14:50:40,268 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:50:40,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:50:41,031 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:50:41,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:50:41,046 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-21 14:50:41,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:50:41 BoogieIcfgContainer [2021-12-21 14:50:41,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:50:41,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:50:41,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:50:41,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:50:41,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:50:39" (1/3) ... [2021-12-21 14:50:41,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61286cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:50:41, skipping insertion in model container [2021-12-21 14:50:41,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:39" (2/3) ... [2021-12-21 14:50:41,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61286cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:50:41, skipping insertion in model container [2021-12-21 14:50:41,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:50:41" (3/3) ... [2021-12-21 14:50:41,055 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.14.cil.c [2021-12-21 14:50:41,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:50:41,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:50:41,095 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:50:41,100 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 14:50:41,101 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:50:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-21 14:50:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 14:50:41,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:41,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:41,131 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:41,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2140149972, now seen corresponding path program 1 times [2021-12-21 14:50:41,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:41,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760799587] [2021-12-21 14:50:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:41,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 14:50:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:41,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:41,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760799587] [2021-12-21 14:50:41,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760799587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:41,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:41,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:41,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873559321] [2021-12-21 14:50:41,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:41,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:41,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:41,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:41,492 INFO L87 Difference]: Start difference. First operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:41,792 INFO L93 Difference]: Finished difference Result 964 states and 1568 transitions. [2021-12-21 14:50:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:41,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-21 14:50:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:41,810 INFO L225 Difference]: With dead ends: 964 [2021-12-21 14:50:41,810 INFO L226 Difference]: Without dead ends: 519 [2021-12-21 14:50:41,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:41,822 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 953 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:41,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1133 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:50:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-21 14:50:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2021-12-21 14:50:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 462 states have (on average 1.5346320346320346) internal successors, (709), 467 states have internal predecessors, (709), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-21 14:50:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 787 transitions. [2021-12-21 14:50:41,909 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 787 transitions. Word has length 44 [2021-12-21 14:50:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:41,910 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 787 transitions. [2021-12-21 14:50:41,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 787 transitions. [2021-12-21 14:50:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:50:41,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:41,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:41,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:50:41,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1297015323, now seen corresponding path program 1 times [2021-12-21 14:50:41,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:41,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444321854] [2021-12-21 14:50:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:41,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:41,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:42,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:50:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:42,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:42,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444321854] [2021-12-21 14:50:42,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444321854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:42,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:42,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:42,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208032181] [2021-12-21 14:50:42,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:42,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:42,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:42,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:42,032 INFO L87 Difference]: Start difference. First operand 513 states and 787 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:42,487 INFO L93 Difference]: Finished difference Result 761 states and 1127 transitions. [2021-12-21 14:50:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:50:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:42,492 INFO L225 Difference]: With dead ends: 761 [2021-12-21 14:50:42,492 INFO L226 Difference]: Without dead ends: 637 [2021-12-21 14:50:42,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:42,498 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 369 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:42,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1496 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:50:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-12-21 14:50:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 580. [2021-12-21 14:50:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 523 states have (on average 1.5162523900573615) internal successors, (793), 528 states have internal predecessors, (793), 41 states have call successors, (41), 15 states have call predecessors, (41), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-21 14:50:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 877 transitions. [2021-12-21 14:50:42,543 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 877 transitions. Word has length 45 [2021-12-21 14:50:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:42,544 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 877 transitions. [2021-12-21 14:50:42,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 877 transitions. [2021-12-21 14:50:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:50:42,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:42,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:42,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:50:42,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1713594512, now seen corresponding path program 1 times [2021-12-21 14:50:42,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:42,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931709704] [2021-12-21 14:50:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:42,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:42,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:42,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:50:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:42,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:42,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931709704] [2021-12-21 14:50:42,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931709704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:42,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:42,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:42,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124884488] [2021-12-21 14:50:42,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:42,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:42,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:42,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:42,656 INFO L87 Difference]: Start difference. First operand 580 states and 877 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:42,840 INFO L93 Difference]: Finished difference Result 988 states and 1436 transitions. [2021-12-21 14:50:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:50:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:42,846 INFO L225 Difference]: With dead ends: 988 [2021-12-21 14:50:42,846 INFO L226 Difference]: Without dead ends: 797 [2021-12-21 14:50:42,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:42,853 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 962 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:42,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 1137 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-12-21 14:50:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 745. [2021-12-21 14:50:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 669 states have (on average 1.4693572496263079) internal successors, (983), 677 states have internal predecessors, (983), 52 states have call successors, (52), 22 states have call predecessors, (52), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-21 14:50:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1095 transitions. [2021-12-21 14:50:42,892 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1095 transitions. Word has length 45 [2021-12-21 14:50:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:42,892 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1095 transitions. [2021-12-21 14:50:42,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1095 transitions. [2021-12-21 14:50:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 14:50:42,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:42,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:42,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:50:42,895 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1877488540, now seen corresponding path program 1 times [2021-12-21 14:50:42,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:42,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720136450] [2021-12-21 14:50:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:42,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:42,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 14:50:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:42,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:50:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:50:42,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:42,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720136450] [2021-12-21 14:50:42,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720136450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:42,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:42,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:42,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90177750] [2021-12-21 14:50:42,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:42,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:42,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:42,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:42,976 INFO L87 Difference]: Start difference. First operand 745 states and 1095 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:43,435 INFO L93 Difference]: Finished difference Result 1329 states and 1880 transitions. [2021-12-21 14:50:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:43,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-21 14:50:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:43,440 INFO L225 Difference]: With dead ends: 1329 [2021-12-21 14:50:43,441 INFO L226 Difference]: Without dead ends: 973 [2021-12-21 14:50:43,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:43,442 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 353 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:43,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1523 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:50:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-21 14:50:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 935. [2021-12-21 14:50:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 835 states have (on average 1.4167664670658682) internal successors, (1183), 845 states have internal predecessors, (1183), 66 states have call successors, (66), 30 states have call predecessors, (66), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-21 14:50:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1333 transitions. [2021-12-21 14:50:43,478 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1333 transitions. Word has length 62 [2021-12-21 14:50:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:43,479 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1333 transitions. [2021-12-21 14:50:43,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1333 transitions. [2021-12-21 14:50:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 14:50:43,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:43,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:43,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:50:43,482 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1022869652, now seen corresponding path program 1 times [2021-12-21 14:50:43,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:43,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303132315] [2021-12-21 14:50:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:43,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:50:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 14:50:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:50:43,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:43,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303132315] [2021-12-21 14:50:43,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303132315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:43,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:43,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:43,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627876944] [2021-12-21 14:50:43,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:43,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:43,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:43,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:43,532 INFO L87 Difference]: Start difference. First operand 935 states and 1333 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:50:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:43,698 INFO L93 Difference]: Finished difference Result 1588 states and 2186 transitions. [2021-12-21 14:50:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:43,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-21 14:50:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:43,704 INFO L225 Difference]: With dead ends: 1588 [2021-12-21 14:50:43,704 INFO L226 Difference]: Without dead ends: 1134 [2021-12-21 14:50:43,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:43,706 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 949 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:43,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 1134 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-12-21 14:50:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1079. [2021-12-21 14:50:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 963 states have (on average 1.3852544132917965) internal successors, (1334), 975 states have internal predecessors, (1334), 74 states have call successors, (74), 36 states have call predecessors, (74), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-21 14:50:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1506 transitions. [2021-12-21 14:50:43,765 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1506 transitions. Word has length 67 [2021-12-21 14:50:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:43,766 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1506 transitions. [2021-12-21 14:50:43,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:50:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1506 transitions. [2021-12-21 14:50:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:50:43,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:43,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:43,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:50:43,769 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:43,769 INFO L85 PathProgramCache]: Analyzing trace with hash 604966393, now seen corresponding path program 1 times [2021-12-21 14:50:43,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:43,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069595328] [2021-12-21 14:50:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:43,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:50:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:50:43,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:43,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069595328] [2021-12-21 14:50:43,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069595328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:43,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176560559] [2021-12-21 14:50:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:43,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:43,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:43,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:43,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:50:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 14:50:44,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:44,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:50:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:44,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176560559] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:44,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 14:50:44,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-21 14:50:44,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721429742] [2021-12-21 14:50:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:44,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:44,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:50:44,315 INFO L87 Difference]: Start difference. First operand 1079 states and 1506 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:44,458 INFO L93 Difference]: Finished difference Result 1135 states and 1574 transitions. [2021-12-21 14:50:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 14:50:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-21 14:50:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:44,466 INFO L225 Difference]: With dead ends: 1135 [2021-12-21 14:50:44,466 INFO L226 Difference]: Without dead ends: 1132 [2021-12-21 14:50:44,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:50:44,467 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 1271 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:44,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 788 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-12-21 14:50:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1078. [2021-12-21 14:50:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 963 states have (on average 1.3831775700934579) internal successors, (1332), 974 states have internal predecessors, (1332), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-21 14:50:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1503 transitions. [2021-12-21 14:50:44,519 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1503 transitions. Word has length 68 [2021-12-21 14:50:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:44,519 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1503 transitions. [2021-12-21 14:50:44,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:44,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1503 transitions. [2021-12-21 14:50:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:50:44,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:44,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:44,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:44,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 14:50:44,739 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1572679607, now seen corresponding path program 1 times [2021-12-21 14:50:44,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:44,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385819750] [2021-12-21 14:50:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:44,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:44,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:44,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:44,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:50:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:50:44,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385819750] [2021-12-21 14:50:44,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385819750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:44,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747711741] [2021-12-21 14:50:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:44,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:44,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:44,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:50:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:44,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:50:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:45,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:50:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:45,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747711741] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:50:45,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:50:45,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-21 14:50:45,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518216831] [2021-12-21 14:50:45,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:50:45,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 14:50:45,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 14:50:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:45,413 INFO L87 Difference]: Start difference. First operand 1078 states and 1503 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:50:46,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:46,972 INFO L93 Difference]: Finished difference Result 2778 states and 3723 transitions. [2021-12-21 14:50:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 14:50:46,973 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-21 14:50:46,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:46,981 INFO L225 Difference]: With dead ends: 2778 [2021-12-21 14:50:46,982 INFO L226 Difference]: Without dead ends: 2234 [2021-12-21 14:50:46,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 14:50:46,984 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 1316 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 4011 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:46,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1349 Valid, 4011 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:50:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-12-21 14:50:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1467. [2021-12-21 14:50:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1313 states have (on average 1.345011424219345) internal successors, (1766), 1332 states have internal predecessors, (1766), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2021-12-21 14:50:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1991 transitions. [2021-12-21 14:50:47,057 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1991 transitions. Word has length 69 [2021-12-21 14:50:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:47,057 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 1991 transitions. [2021-12-21 14:50:47,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:50:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1991 transitions. [2021-12-21 14:50:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 14:50:47,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:47,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:47,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:47,275 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,SelfDestructingSolverStorable6 [2021-12-21 14:50:47,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 498798882, now seen corresponding path program 1 times [2021-12-21 14:50:47,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:47,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147496210] [2021-12-21 14:50:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:47,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:47,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:47,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:47,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:50:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:47,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 14:50:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 14:50:47,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147496210] [2021-12-21 14:50:47,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147496210] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968350639] [2021-12-21 14:50:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:47,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:47,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:47,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:47,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:50:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:47,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:50:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:47,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:50:47,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968350639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:47,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:50:47,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:50:47,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269984254] [2021-12-21 14:50:47,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:50:47,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:50:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:47,628 INFO L87 Difference]: Start difference. First operand 1467 states and 1991 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:50:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:47,692 INFO L93 Difference]: Finished difference Result 2190 states and 2929 transitions. [2021-12-21 14:50:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:50:47,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-21 14:50:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:47,699 INFO L225 Difference]: With dead ends: 2190 [2021-12-21 14:50:47,699 INFO L226 Difference]: Without dead ends: 1345 [2021-12-21 14:50:47,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:47,704 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 656 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:47,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 802 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:50:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-12-21 14:50:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1330. [2021-12-21 14:50:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1192 states have (on average 1.348993288590604) internal successors, (1608), 1210 states have internal predecessors, (1608), 85 states have call successors, (85), 44 states have call predecessors, (85), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2021-12-21 14:50:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1811 transitions. [2021-12-21 14:50:47,762 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1811 transitions. Word has length 88 [2021-12-21 14:50:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:47,762 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 1811 transitions. [2021-12-21 14:50:47,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:50:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1811 transitions. [2021-12-21 14:50:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 14:50:47,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:47,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:47,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:47,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:47,994 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:47,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:47,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1813831709, now seen corresponding path program 1 times [2021-12-21 14:50:47,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:47,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470320389] [2021-12-21 14:50:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:47,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 14:50:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 14:50:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 14:50:48,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470320389] [2021-12-21 14:50:48,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470320389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634141290] [2021-12-21 14:50:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:48,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:48,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:48,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:48,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:50:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:50:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:50:48,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:50:48,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634141290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:48,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:50:48,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:50:48,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247849791] [2021-12-21 14:50:48,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:48,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:50:48,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:50:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:48,396 INFO L87 Difference]: Start difference. First operand 1330 states and 1811 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:50:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:48,447 INFO L93 Difference]: Finished difference Result 1709 states and 2279 transitions. [2021-12-21 14:50:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:50:48,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-21 14:50:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:48,450 INFO L225 Difference]: With dead ends: 1709 [2021-12-21 14:50:48,450 INFO L226 Difference]: Without dead ends: 383 [2021-12-21 14:50:48,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:48,454 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 62 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:48,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1412 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:50:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-21 14:50:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-12-21 14:50:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5804597701149425) internal successors, (550), 350 states have internal predecessors, (550), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 14:50:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 604 transitions. [2021-12-21 14:50:48,467 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 604 transitions. Word has length 103 [2021-12-21 14:50:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:48,467 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 604 transitions. [2021-12-21 14:50:48,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:50:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 604 transitions. [2021-12-21 14:50:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:50:48,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:48,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:48,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:48,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:48,692 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:48,692 INFO L85 PathProgramCache]: Analyzing trace with hash -659936082, now seen corresponding path program 1 times [2021-12-21 14:50:48,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:48,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879729542] [2021-12-21 14:50:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:48,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:48,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:48,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879729542] [2021-12-21 14:50:48,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879729542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:48,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:48,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:50:48,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103476517] [2021-12-21 14:50:48,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:48,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:50:48,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:48,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:50:48,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:48,828 INFO L87 Difference]: Start difference. First operand 383 states and 604 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:50,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:50,232 INFO L93 Difference]: Finished difference Result 901 states and 1444 transitions. [2021-12-21 14:50:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:50:50,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:50:50,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:50,236 INFO L225 Difference]: With dead ends: 901 [2021-12-21 14:50:50,236 INFO L226 Difference]: Without dead ends: 525 [2021-12-21 14:50:50,237 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 [2021-12-21 14:50:50,238 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 1042 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:50,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 1085 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:50:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-21 14:50:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2021-12-21 14:50:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5775862068965518) internal successors, (549), 350 states have internal predecessors, (549), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 14:50:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 603 transitions. [2021-12-21 14:50:50,280 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 603 transitions. Word has length 179 [2021-12-21 14:50:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:50,280 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 603 transitions. [2021-12-21 14:50:50,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 603 transitions. [2021-12-21 14:50:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:50:50,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:50,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:50,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:50:50,283 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1308528852, now seen corresponding path program 1 times [2021-12-21 14:50:50,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:50,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702611737] [2021-12-21 14:50:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:50,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:50,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:50,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702611737] [2021-12-21 14:50:50,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702611737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:50,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:50,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:50:50,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245661793] [2021-12-21 14:50:50,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:50,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:50:50,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:50:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:50,422 INFO L87 Difference]: Start difference. First operand 383 states and 603 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:51,631 INFO L93 Difference]: Finished difference Result 893 states and 1427 transitions. [2021-12-21 14:50:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:50:51,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:50:51,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:51,636 INFO L225 Difference]: With dead ends: 893 [2021-12-21 14:50:51,636 INFO L226 Difference]: Without dead ends: 525 [2021-12-21 14:50:51,638 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 [2021-12-21 14:50:51,638 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 1033 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:51,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1083 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:50:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-21 14:50:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2021-12-21 14:50:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5747126436781609) internal successors, (548), 350 states have internal predecessors, (548), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 14:50:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 602 transitions. [2021-12-21 14:50:51,667 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 602 transitions. Word has length 179 [2021-12-21 14:50:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:51,668 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 602 transitions. [2021-12-21 14:50:51,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 602 transitions. [2021-12-21 14:50:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:50:51,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:51,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:51,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:50:51,671 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1807085654, now seen corresponding path program 1 times [2021-12-21 14:50:51,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:51,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540577235] [2021-12-21 14:50:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:51,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:51,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:51,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:51,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:51,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:51,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:51,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:51,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540577235] [2021-12-21 14:50:51,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540577235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:51,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:51,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:50:51,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793747971] [2021-12-21 14:50:51,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:51,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:50:51,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:50:51,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:50:51,831 INFO L87 Difference]: Start difference. First operand 383 states and 602 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:54,549 INFO L93 Difference]: Finished difference Result 1409 states and 2265 transitions. [2021-12-21 14:50:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:50:54,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:50:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:54,554 INFO L225 Difference]: With dead ends: 1409 [2021-12-21 14:50:54,554 INFO L226 Difference]: Without dead ends: 1047 [2021-12-21 14:50:54,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:54,556 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 1564 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:54,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 1745 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 14:50:54,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-12-21 14:50:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 762. [2021-12-21 14:50:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 699 states have (on average 1.5879828326180256) internal successors, (1110), 702 states have internal predecessors, (1110), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-21 14:50:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1209 transitions. [2021-12-21 14:50:54,606 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1209 transitions. Word has length 179 [2021-12-21 14:50:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:54,606 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1209 transitions. [2021-12-21 14:50:54,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1209 transitions. [2021-12-21 14:50:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:50:54,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:54,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:54,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:50:54,608 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:54,609 INFO L85 PathProgramCache]: Analyzing trace with hash -826130840, now seen corresponding path program 1 times [2021-12-21 14:50:54,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:54,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710944453] [2021-12-21 14:50:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:54,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:54,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710944453] [2021-12-21 14:50:54,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710944453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:54,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:54,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:54,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588122686] [2021-12-21 14:50:54,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:54,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:54,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:54,775 INFO L87 Difference]: Start difference. First operand 762 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:58,129 INFO L93 Difference]: Finished difference Result 2328 states and 3751 transitions. [2021-12-21 14:50:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:58,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:50:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:58,136 INFO L225 Difference]: With dead ends: 2328 [2021-12-21 14:50:58,136 INFO L226 Difference]: Without dead ends: 1587 [2021-12-21 14:50:58,138 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 [2021-12-21 14:50:58,138 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 1591 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:58,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 3012 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3077 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 14:50:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-12-21 14:50:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1114. [2021-12-21 14:50:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1023 states have (on average 1.5816226783968719) internal successors, (1618), 1027 states have internal predecessors, (1618), 70 states have call successors, (70), 19 states have call predecessors, (70), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-21 14:50:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1761 transitions. [2021-12-21 14:50:58,215 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1761 transitions. Word has length 179 [2021-12-21 14:50:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:58,215 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1761 transitions. [2021-12-21 14:50:58,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1761 transitions. [2021-12-21 14:50:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:50:58,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:58,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:58,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:50:58,218 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1699364842, now seen corresponding path program 1 times [2021-12-21 14:50:58,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:58,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339809819] [2021-12-21 14:50:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:58,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:58,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:58,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:50:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:58,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:50:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:58,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:50:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:58,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:50:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:58,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:58,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339809819] [2021-12-21 14:50:58,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339809819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:58,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:58,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:58,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934421748] [2021-12-21 14:50:58,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:58,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:58,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:58,379 INFO L87 Difference]: Start difference. First operand 1114 states and 1761 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:01,630 INFO L93 Difference]: Finished difference Result 3683 states and 5923 transitions. [2021-12-21 14:51:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:51:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:01,642 INFO L225 Difference]: With dead ends: 3683 [2021-12-21 14:51:01,643 INFO L226 Difference]: Without dead ends: 2590 [2021-12-21 14:51:01,646 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 [2021-12-21 14:51:01,647 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 1588 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3083 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:01,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1607 Valid, 3000 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3083 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 14:51:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-12-21 14:51:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 1819. [2021-12-21 14:51:01,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.575956937799043) internal successors, (2635), 1678 states have internal predecessors, (2635), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-21 14:51:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2870 transitions. [2021-12-21 14:51:01,802 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2870 transitions. Word has length 179 [2021-12-21 14:51:01,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:01,802 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2870 transitions. [2021-12-21 14:51:01,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2870 transitions. [2021-12-21 14:51:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:01,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:01,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:01,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:51:01,805 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:01,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:01,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1088095784, now seen corresponding path program 1 times [2021-12-21 14:51:01,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:01,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708675403] [2021-12-21 14:51:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:01,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:01,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:01,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:01,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:01,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:01,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:01,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:01,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708675403] [2021-12-21 14:51:01,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708675403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:01,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:01,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:01,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007559102] [2021-12-21 14:51:01,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:01,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:01,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:01,973 INFO L87 Difference]: Start difference. First operand 1819 states and 2870 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:03,446 INFO L93 Difference]: Finished difference Result 4376 states and 7023 transitions. [2021-12-21 14:51:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:51:03,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:03,456 INFO L225 Difference]: With dead ends: 4376 [2021-12-21 14:51:03,456 INFO L226 Difference]: Without dead ends: 2578 [2021-12-21 14:51:03,461 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 [2021-12-21 14:51:03,461 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1295 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:03,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 1407 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:51:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-12-21 14:51:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1819. [2021-12-21 14:51:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.5729665071770336) internal successors, (2630), 1678 states have internal predecessors, (2630), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-21 14:51:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2865 transitions. [2021-12-21 14:51:03,612 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2865 transitions. Word has length 179 [2021-12-21 14:51:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:03,614 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2865 transitions. [2021-12-21 14:51:03,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2865 transitions. [2021-12-21 14:51:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:03,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:03,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:03,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:51:03,617 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:03,617 INFO L85 PathProgramCache]: Analyzing trace with hash -317095894, now seen corresponding path program 1 times [2021-12-21 14:51:03,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:03,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496327345] [2021-12-21 14:51:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:03,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:03,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:03,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:03,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:03,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:03,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:03,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496327345] [2021-12-21 14:51:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496327345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:03,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:03,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:03,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693743097] [2021-12-21 14:51:03,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:03,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:03,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:03,783 INFO L87 Difference]: Start difference. First operand 1819 states and 2865 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:05,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:05,304 INFO L93 Difference]: Finished difference Result 4370 states and 6997 transitions. [2021-12-21 14:51:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:51:05,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:05,313 INFO L225 Difference]: With dead ends: 4370 [2021-12-21 14:51:05,314 INFO L226 Difference]: Without dead ends: 2572 [2021-12-21 14:51:05,318 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 [2021-12-21 14:51:05,318 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 1296 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:05,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 1401 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:51:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-12-21 14:51:05,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1819. [2021-12-21 14:51:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.569976076555024) internal successors, (2625), 1678 states have internal predecessors, (2625), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-21 14:51:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2860 transitions. [2021-12-21 14:51:05,482 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2860 transitions. Word has length 179 [2021-12-21 14:51:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:05,482 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2860 transitions. [2021-12-21 14:51:05,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2860 transitions. [2021-12-21 14:51:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:05,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:05,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:05,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:51:05,486 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:05,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1577237992, now seen corresponding path program 1 times [2021-12-21 14:51:05,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:05,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813363161] [2021-12-21 14:51:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:05,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:05,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:05,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:05,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:05,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:05,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:05,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:05,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813363161] [2021-12-21 14:51:05,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813363161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:05,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:05,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:05,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467303296] [2021-12-21 14:51:05,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:05,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:05,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:05,639 INFO L87 Difference]: Start difference. First operand 1819 states and 2860 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:07,356 INFO L93 Difference]: Finished difference Result 4358 states and 6959 transitions. [2021-12-21 14:51:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:51:07,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:07,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:07,366 INFO L225 Difference]: With dead ends: 4358 [2021-12-21 14:51:07,367 INFO L226 Difference]: Without dead ends: 2560 [2021-12-21 14:51:07,372 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 [2021-12-21 14:51:07,372 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 1125 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:07,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 1594 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 14:51:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-12-21 14:51:07,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1819. [2021-12-21 14:51:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.5669856459330143) internal successors, (2620), 1678 states have internal predecessors, (2620), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-21 14:51:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2855 transitions. [2021-12-21 14:51:07,554 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2855 transitions. Word has length 179 [2021-12-21 14:51:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:07,554 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2855 transitions. [2021-12-21 14:51:07,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2855 transitions. [2021-12-21 14:51:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:07,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:07,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:07,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:51:07,557 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash 654070566, now seen corresponding path program 1 times [2021-12-21 14:51:07,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:07,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093413976] [2021-12-21 14:51:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:07,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:07,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:07,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:07,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:07,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:07,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:07,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:07,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093413976] [2021-12-21 14:51:07,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093413976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:07,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:07,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:07,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355328757] [2021-12-21 14:51:07,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:07,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:07,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:07,728 INFO L87 Difference]: Start difference. First operand 1819 states and 2855 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:10,784 INFO L93 Difference]: Finished difference Result 6263 states and 9956 transitions. [2021-12-21 14:51:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:51:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:10,800 INFO L225 Difference]: With dead ends: 6263 [2021-12-21 14:51:10,800 INFO L226 Difference]: Without dead ends: 4465 [2021-12-21 14:51:10,805 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 [2021-12-21 14:51:10,805 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 1563 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:10,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 2972 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3005 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 14:51:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2021-12-21 14:51:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 3248. [2021-12-21 14:51:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2989 states have (on average 1.5617263298762127) internal successors, (4668), 2999 states have internal predecessors, (4668), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-21 14:51:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 5093 transitions. [2021-12-21 14:51:11,152 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 5093 transitions. Word has length 179 [2021-12-21 14:51:11,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:11,152 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 5093 transitions. [2021-12-21 14:51:11,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 5093 transitions. [2021-12-21 14:51:11,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:11,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:11,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:11,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:51:11,156 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:11,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:11,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1039932968, now seen corresponding path program 1 times [2021-12-21 14:51:11,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:11,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627261279] [2021-12-21 14:51:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:11,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:11,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:11,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:11,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:11,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:11,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:11,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:11,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627261279] [2021-12-21 14:51:11,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627261279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:11,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:11,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:11,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951022426] [2021-12-21 14:51:11,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:11,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:11,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:11,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:11,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:11,298 INFO L87 Difference]: Start difference. First operand 3248 states and 5093 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:12,800 INFO L93 Difference]: Finished difference Result 7712 states and 12262 transitions. [2021-12-21 14:51:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:51:12,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:12,814 INFO L225 Difference]: With dead ends: 7712 [2021-12-21 14:51:12,814 INFO L226 Difference]: Without dead ends: 4485 [2021-12-21 14:51:12,821 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 [2021-12-21 14:51:12,821 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 1361 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:12,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 1351 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:51:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2021-12-21 14:51:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3248. [2021-12-21 14:51:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2989 states have (on average 1.5587152893944463) internal successors, (4659), 2999 states have internal predecessors, (4659), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-21 14:51:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 5084 transitions. [2021-12-21 14:51:13,176 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 5084 transitions. Word has length 179 [2021-12-21 14:51:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:13,176 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 5084 transitions. [2021-12-21 14:51:13,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 5084 transitions. [2021-12-21 14:51:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:13,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:13,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:13,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:51:13,179 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:13,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash 775285478, now seen corresponding path program 1 times [2021-12-21 14:51:13,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:13,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540260640] [2021-12-21 14:51:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:13,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:13,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:13,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:13,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:13,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:13,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:13,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540260640] [2021-12-21 14:51:13,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540260640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:13,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:13,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:13,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941067562] [2021-12-21 14:51:13,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:13,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:13,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:13,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:13,342 INFO L87 Difference]: Start difference. First operand 3248 states and 5084 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:16,935 INFO L93 Difference]: Finished difference Result 11464 states and 18144 transitions. [2021-12-21 14:51:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:51:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:16,955 INFO L225 Difference]: With dead ends: 11464 [2021-12-21 14:51:16,956 INFO L226 Difference]: Without dead ends: 8237 [2021-12-21 14:51:16,963 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 [2021-12-21 14:51:16,963 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 1555 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 2978 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 2961 SdHoareTripleChecker+Invalid, 3064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:16,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 2961 Invalid, 3064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2978 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 14:51:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8237 states. [2021-12-21 14:51:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8237 to 6114. [2021-12-21 14:51:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 5631 states have (on average 1.554075652637187) internal successors, (8751), 5649 states have internal predecessors, (8751), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-21 14:51:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9574 transitions. [2021-12-21 14:51:17,666 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9574 transitions. Word has length 179 [2021-12-21 14:51:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:17,667 INFO L470 AbstractCegarLoop]: Abstraction has 6114 states and 9574 transitions. [2021-12-21 14:51:17,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9574 transitions. [2021-12-21 14:51:17,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:17,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:17,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:17,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:51:17,671 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1588556184, now seen corresponding path program 1 times [2021-12-21 14:51:17,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:17,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590287977] [2021-12-21 14:51:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:17,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:17,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:17,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:17,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:17,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:17,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:17,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:17,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590287977] [2021-12-21 14:51:17,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590287977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:17,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:17,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:17,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432387955] [2021-12-21 14:51:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:17,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:17,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:17,824 INFO L87 Difference]: Start difference. First operand 6114 states and 9574 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:20,024 INFO L93 Difference]: Finished difference Result 14408 states and 22861 transitions. [2021-12-21 14:51:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:51:20,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:20,042 INFO L225 Difference]: With dead ends: 14408 [2021-12-21 14:51:20,042 INFO L226 Difference]: Without dead ends: 8315 [2021-12-21 14:51:20,054 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 [2021-12-21 14:51:20,055 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 1123 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:20,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 1580 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:51:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2021-12-21 14:51:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 6114. [2021-12-21 14:51:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 5631 states have (on average 1.5510566506837151) internal successors, (8734), 5649 states have internal predecessors, (8734), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-21 14:51:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9557 transitions. [2021-12-21 14:51:20,719 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9557 transitions. Word has length 179 [2021-12-21 14:51:20,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:20,719 INFO L470 AbstractCegarLoop]: Abstraction has 6114 states and 9557 transitions. [2021-12-21 14:51:20,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9557 transitions. [2021-12-21 14:51:20,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:20,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:20,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:20,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:51:20,723 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:20,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:20,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1383232166, now seen corresponding path program 1 times [2021-12-21 14:51:20,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:20,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465259992] [2021-12-21 14:51:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:20,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:20,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:20,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:20,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:20,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:20,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:20,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465259992] [2021-12-21 14:51:20,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465259992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:20,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:20,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:20,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687054321] [2021-12-21 14:51:20,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:20,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:20,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:20,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:20,868 INFO L87 Difference]: Start difference. First operand 6114 states and 9557 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:23,292 INFO L93 Difference]: Finished difference Result 14390 states and 22774 transitions. [2021-12-21 14:51:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:51:23,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:23,318 INFO L225 Difference]: With dead ends: 14390 [2021-12-21 14:51:23,318 INFO L226 Difference]: Without dead ends: 8297 [2021-12-21 14:51:23,332 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 [2021-12-21 14:51:23,333 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 1121 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:23,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 1576 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 14:51:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2021-12-21 14:51:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 6114. [2021-12-21 14:51:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 5631 states have (on average 1.5480376487302432) internal successors, (8717), 5649 states have internal predecessors, (8717), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-21 14:51:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9540 transitions. [2021-12-21 14:51:24,065 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9540 transitions. Word has length 179 [2021-12-21 14:51:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:24,065 INFO L470 AbstractCegarLoop]: Abstraction has 6114 states and 9540 transitions. [2021-12-21 14:51:24,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9540 transitions. [2021-12-21 14:51:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:24,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:24,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:24,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 14:51:24,070 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1014755672, now seen corresponding path program 1 times [2021-12-21 14:51:24,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:24,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621771268] [2021-12-21 14:51:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:24,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:24,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:24,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:24,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:24,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:24,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:24,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621771268] [2021-12-21 14:51:24,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621771268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:24,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:24,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:24,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650315810] [2021-12-21 14:51:24,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:24,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:24,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:24,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:24,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:24,202 INFO L87 Difference]: Start difference. First operand 6114 states and 9540 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:28,685 INFO L93 Difference]: Finished difference Result 21844 states and 34408 transitions. [2021-12-21 14:51:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:51:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-21 14:51:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:28,735 INFO L225 Difference]: With dead ends: 21844 [2021-12-21 14:51:28,735 INFO L226 Difference]: Without dead ends: 15751 [2021-12-21 14:51:28,753 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 [2021-12-21 14:51:28,754 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 1543 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 2929 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:28,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 2942 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2929 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 14:51:28,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15751 states. [2021-12-21 14:51:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15751 to 11893. [2021-12-21 14:51:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11893 states, 10962 states have (on average 1.5437876299945266) internal successors, (16923), 10996 states have internal predecessors, (16923), 700 states have call successors, (700), 199 states have call predecessors, (700), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2021-12-21 14:51:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11893 states to 11893 states and 18596 transitions. [2021-12-21 14:51:30,023 INFO L78 Accepts]: Start accepts. Automaton has 11893 states and 18596 transitions. Word has length 179 [2021-12-21 14:51:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:30,023 INFO L470 AbstractCegarLoop]: Abstraction has 11893 states and 18596 transitions. [2021-12-21 14:51:30,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:51:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 11893 states and 18596 transitions. [2021-12-21 14:51:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 14:51:30,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:30,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:51:30,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 14:51:30,030 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash -676468122, now seen corresponding path program 1 times [2021-12-21 14:51:30,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:30,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369348887] [2021-12-21 14:51:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:30,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:30,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:30,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 14:51:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:30,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:51:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:30,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-21 14:51:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:30,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 14:51:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:30,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:30,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369348887] [2021-12-21 14:51:30,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369348887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:30,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:30,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:51:30,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786399206] [2021-12-21 14:51:30,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:30,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:51:30,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:51:30,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:51:30,183 INFO L87 Difference]: Start difference. First operand 11893 states and 18596 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)