./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.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_3.cil+token_ring.05.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8067f6f3f9b2e7af84aa5945c9ed2ea4ff7d9ddfc1aa86a10fb4bb83ea8bdef8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:53:32,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:53:32,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:53:32,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:53:32,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:53:32,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:53:32,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:53:32,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:53:32,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:53:32,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:53:32,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:53:32,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:53:32,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:53:32,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:53:32,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:53:32,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:53:32,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:53:32,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:53:32,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:53:32,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:53:32,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:53:32,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:53:32,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:53:32,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:53:32,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:53:32,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:53:32,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:53:32,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:53:32,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:53:32,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:53:32,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:53:32,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:53:32,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:53:32,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:53:32,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:53:32,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:53:32,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:53:32,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:53:32,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:53:32,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:53:32,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:53:32,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:53:32,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:53:32,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:53:32,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:53:32,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:53:32,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:53:32,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:53:32,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:53:32,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:53:32,900 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:53:32,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:53:32,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:53:32,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:53:32,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:53:32,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:53:32,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:53:32,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:53:32,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:53:32,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:53:32,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:53:32,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:53:32,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:53:32,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:53:32,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:53:32,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:53:32,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:53:32,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:53:32,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:53:32,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:53:32,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:53:32,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:53:32,902 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:53:32,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:53:32,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:53:32,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:53:32,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8067f6f3f9b2e7af84aa5945c9ed2ea4ff7d9ddfc1aa86a10fb4bb83ea8bdef8 [2021-12-21 14:53:33,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:53:33,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:53:33,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:53:33,161 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:53:33,163 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:53:33,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c [2021-12-21 14:53:33,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48189082a/536d372a1a4b4e738187a3dabe60b9f8/FLAGbb5762c65 [2021-12-21 14:53:33,606 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:53:33,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c [2021-12-21 14:53:33,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48189082a/536d372a1a4b4e738187a3dabe60b9f8/FLAGbb5762c65 [2021-12-21 14:53:34,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48189082a/536d372a1a4b4e738187a3dabe60b9f8 [2021-12-21 14:53:34,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:53:34,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:53:34,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:53:34,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:53:34,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:53:34,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@294156f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34, skipping insertion in model container [2021-12-21 14:53:34,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:53:34,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:53:34,229 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c[911,924] [2021-12-21 14:53:34,299 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c[8416,8429] [2021-12-21 14:53:34,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:53:34,364 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:53:34,372 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c[911,924] [2021-12-21 14:53:34,402 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c[8416,8429] [2021-12-21 14:53:34,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:53:34,451 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:53:34,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34 WrapperNode [2021-12-21 14:53:34,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:53:34,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:53:34,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:53:34,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:53:34,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,524 INFO L137 Inliner]: procedures = 65, calls = 77, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 677 [2021-12-21 14:53:34,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:53:34,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:53:34,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:53:34,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:53:34,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:53:34,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:53:34,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:53:34,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:53:34,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (1/1) ... [2021-12-21 14:53:34,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:53:34,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:53:34,626 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 14:53:34,644 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 14:53:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:53:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:53:34,656 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:53:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-21 14:53:34,658 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-21 14:53:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:53:34,658 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:53:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:53:34,658 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:53:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-21 14:53:34,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-21 14:53:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:53:34,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:53:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:53:34,659 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:53:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-21 14:53:34,660 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-21 14:53:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-21 14:53:34,660 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-21 14:53:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-21 14:53:34,660 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-21 14:53:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:53:34,661 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:53:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:53:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:53:34,661 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:53:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-21 14:53:34,661 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-21 14:53:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:53:34,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:53:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:53:34,662 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:53:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-21 14:53:34,663 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-21 14:53:34,802 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:53:34,803 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:53:35,292 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-21 14:53:35,293 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-21 14:53:35,339 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:53:35,346 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:53:35,347 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-12-21 14:53:35,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:53:35 BoogieIcfgContainer [2021-12-21 14:53:35,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:53:35,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:53:35,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:53:35,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:53:35,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:53:34" (1/3) ... [2021-12-21 14:53:35,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d28342c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:53:35, skipping insertion in model container [2021-12-21 14:53:35,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:53:34" (2/3) ... [2021-12-21 14:53:35,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d28342c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:53:35, skipping insertion in model container [2021-12-21 14:53:35,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:53:35" (3/3) ... [2021-12-21 14:53:35,354 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.05.cil-2.c [2021-12-21 14:53:35,358 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:53:35,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:53:35,393 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:53:35,399 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 14:53:35,399 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:53:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 332 states, 277 states have (on average 1.6028880866425992) internal successors, (444), 285 states have internal predecessors, (444), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-21 14:53:35,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:53:35,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:35,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:35,441 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash 481480506, now seen corresponding path program 1 times [2021-12-21 14:53:35,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:35,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935831986] [2021-12-21 14:53:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:35,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:35,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:35,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:35,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:35,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:35,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:53:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:53:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:35,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:53:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:35,742 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 14:53:35,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:35,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935831986] [2021-12-21 14:53:35,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935831986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:35,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:35,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:53:35,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216799866] [2021-12-21 14:53:35,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:35,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:53:35,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:35,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:53:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:53:35,765 INFO L87 Difference]: Start difference. First operand has 332 states, 277 states have (on average 1.6028880866425992) internal successors, (444), 285 states have internal predecessors, (444), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:36,476 INFO L93 Difference]: Finished difference Result 793 states and 1237 transitions. [2021-12-21 14:53:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-21 14:53:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:36,488 INFO L225 Difference]: With dead ends: 793 [2021-12-21 14:53:36,488 INFO L226 Difference]: Without dead ends: 472 [2021-12-21 14:53:36,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:53:36,496 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 1089 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:36,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 1468 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:53:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-21 14:53:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 433. [2021-12-21 14:53:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 359 states have (on average 1.49025069637883) internal successors, (535), 366 states have internal predecessors, (535), 50 states have call successors, (50), 22 states have call predecessors, (50), 22 states have return successors, (51), 47 states have call predecessors, (51), 46 states have call successors, (51) [2021-12-21 14:53:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 636 transitions. [2021-12-21 14:53:36,572 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 636 transitions. Word has length 65 [2021-12-21 14:53:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:36,572 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 636 transitions. [2021-12-21 14:53:36,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 636 transitions. [2021-12-21 14:53:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:53:36,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:36,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:36,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:53:36,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2134598150, now seen corresponding path program 1 times [2021-12-21 14:53:36,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:36,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350173396] [2021-12-21 14:53:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:36,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:53:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:53:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:53:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:36,693 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 14:53:36,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:36,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350173396] [2021-12-21 14:53:36,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350173396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:36,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:36,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:53:36,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766805156] [2021-12-21 14:53:36,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:36,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:53:36,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:36,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:53:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:53:36,696 INFO L87 Difference]: Start difference. First operand 433 states and 636 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:37,575 INFO L93 Difference]: Finished difference Result 830 states and 1202 transitions. [2021-12-21 14:53:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 14:53:37,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-21 14:53:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:37,579 INFO L225 Difference]: With dead ends: 830 [2021-12-21 14:53:37,580 INFO L226 Difference]: Without dead ends: 621 [2021-12-21 14:53:37,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-21 14:53:37,581 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 1160 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:37,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 1580 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:53:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-12-21 14:53:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 545. [2021-12-21 14:53:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 449 states have (on average 1.4721603563474388) internal successors, (661), 458 states have internal predecessors, (661), 63 states have call successors, (63), 29 states have call predecessors, (63), 31 states have return successors, (72), 61 states have call predecessors, (72), 59 states have call successors, (72) [2021-12-21 14:53:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 796 transitions. [2021-12-21 14:53:37,612 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 796 transitions. Word has length 65 [2021-12-21 14:53:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:37,612 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 796 transitions. [2021-12-21 14:53:37,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 796 transitions. [2021-12-21 14:53:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:53:37,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:37,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:37,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:53:37,616 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:37,616 INFO L85 PathProgramCache]: Analyzing trace with hash 131783036, now seen corresponding path program 1 times [2021-12-21 14:53:37,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:37,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406879330] [2021-12-21 14:53:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:37,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:53:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:53:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:53:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:37,704 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 14:53:37,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:37,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406879330] [2021-12-21 14:53:37,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406879330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:37,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:37,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 14:53:37,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373409658] [2021-12-21 14:53:37,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:37,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:53:37,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:37,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:53:37,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:53:37,706 INFO L87 Difference]: Start difference. First operand 545 states and 796 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-21 14:53:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:39,287 INFO L93 Difference]: Finished difference Result 2091 states and 2994 transitions. [2021-12-21 14:53:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 14:53:39,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-21 14:53:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:39,299 INFO L225 Difference]: With dead ends: 2091 [2021-12-21 14:53:39,299 INFO L226 Difference]: Without dead ends: 1758 [2021-12-21 14:53:39,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 14:53:39,316 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 2668 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2690 SdHoareTripleChecker+Valid, 2377 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:39,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2690 Valid, 2377 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:53:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-12-21 14:53:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1598. [2021-12-21 14:53:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1297 states have (on average 1.3916730917501927) internal successors, (1805), 1321 states have internal predecessors, (1805), 173 states have call successors, (173), 112 states have call predecessors, (173), 126 states have return successors, (205), 167 states have call predecessors, (205), 169 states have call successors, (205) [2021-12-21 14:53:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2183 transitions. [2021-12-21 14:53:39,438 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2183 transitions. Word has length 65 [2021-12-21 14:53:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:39,438 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 2183 transitions. [2021-12-21 14:53:39,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-21 14:53:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2183 transitions. [2021-12-21 14:53:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:53:39,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:39,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:39,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:53:39,441 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:39,441 INFO L85 PathProgramCache]: Analyzing trace with hash 754147135, now seen corresponding path program 1 times [2021-12-21 14:53:39,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:39,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494776602] [2021-12-21 14:53:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:39,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:39,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:39,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:39,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:39,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:39,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:39,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 14:53:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:39,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 14:53:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:39,607 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 14:53:39,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:39,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494776602] [2021-12-21 14:53:39,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494776602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:39,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:39,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:53:39,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331276390] [2021-12-21 14:53:39,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:39,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:53:39,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:53:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:53:39,609 INFO L87 Difference]: Start difference. First operand 1598 states and 2183 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:53:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:40,469 INFO L93 Difference]: Finished difference Result 3126 states and 4262 transitions. [2021-12-21 14:53:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:53:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-21 14:53:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:40,477 INFO L225 Difference]: With dead ends: 3126 [2021-12-21 14:53:40,478 INFO L226 Difference]: Without dead ends: 1746 [2021-12-21 14:53:40,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:40,487 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 576 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 2061 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:40,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 2061 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:53:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-12-21 14:53:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1638. [2021-12-21 14:53:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1329 states have (on average 1.3777276147479307) internal successors, (1831), 1353 states have internal predecessors, (1831), 173 states have call successors, (173), 112 states have call predecessors, (173), 134 states have return successors, (213), 175 states have call predecessors, (213), 169 states have call successors, (213) [2021-12-21 14:53:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2217 transitions. [2021-12-21 14:53:40,558 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2217 transitions. Word has length 66 [2021-12-21 14:53:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:40,558 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2217 transitions. [2021-12-21 14:53:40,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:53:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2217 transitions. [2021-12-21 14:53:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:53:40,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:40,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:40,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:53:40,560 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash -275212163, now seen corresponding path program 1 times [2021-12-21 14:53:40,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:40,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465184044] [2021-12-21 14:53:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:40,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 14:53:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 14:53:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:40,665 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 14:53:40,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:40,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465184044] [2021-12-21 14:53:40,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465184044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:40,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:40,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 14:53:40,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292829468] [2021-12-21 14:53:40,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:40,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:53:40,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:40,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:53:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:53:40,668 INFO L87 Difference]: Start difference. First operand 1638 states and 2217 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 14:53:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:42,051 INFO L93 Difference]: Finished difference Result 5210 states and 7091 transitions. [2021-12-21 14:53:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 14:53:42,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-21 14:53:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:42,059 INFO L225 Difference]: With dead ends: 5210 [2021-12-21 14:53:42,059 INFO L226 Difference]: Without dead ends: 2029 [2021-12-21 14:53:42,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 14:53:42,067 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 2774 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2796 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:42,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2796 Valid, 2401 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:53:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-12-21 14:53:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1849. [2021-12-21 14:53:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1468 states have (on average 1.3331062670299727) internal successors, (1957), 1494 states have internal predecessors, (1957), 213 states have call successors, (213), 140 states have call predecessors, (213), 166 states have return successors, (259), 217 states have call predecessors, (259), 209 states have call successors, (259) [2021-12-21 14:53:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2429 transitions. [2021-12-21 14:53:42,130 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2429 transitions. Word has length 66 [2021-12-21 14:53:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:42,131 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2429 transitions. [2021-12-21 14:53:42,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 14:53:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2429 transitions. [2021-12-21 14:53:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:53:42,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:42,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:42,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:53:42,134 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:42,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:42,134 INFO L85 PathProgramCache]: Analyzing trace with hash 443189305, now seen corresponding path program 1 times [2021-12-21 14:53:42,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:42,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598262543] [2021-12-21 14:53:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:42,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 14:53:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:53:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:53:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:53:42,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:42,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598262543] [2021-12-21 14:53:42,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598262543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:42,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:42,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:53:42,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228168676] [2021-12-21 14:53:42,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:42,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:53:42,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:53:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:53:42,245 INFO L87 Difference]: Start difference. First operand 1849 states and 2429 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:53:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:42,846 INFO L93 Difference]: Finished difference Result 3674 states and 4831 transitions. [2021-12-21 14:53:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:53:42,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-21 14:53:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:42,854 INFO L225 Difference]: With dead ends: 3674 [2021-12-21 14:53:42,854 INFO L226 Difference]: Without dead ends: 2043 [2021-12-21 14:53:42,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:53:42,858 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 384 mSDsluCounter, 1763 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:42,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2215 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:53:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-12-21 14:53:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1909. [2021-12-21 14:53:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1516 states have (on average 1.3186015831134565) internal successors, (1999), 1542 states have internal predecessors, (1999), 213 states have call successors, (213), 140 states have call predecessors, (213), 178 states have return successors, (271), 229 states have call predecessors, (271), 209 states have call successors, (271) [2021-12-21 14:53:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2483 transitions. [2021-12-21 14:53:42,921 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2483 transitions. Word has length 91 [2021-12-21 14:53:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:42,921 INFO L470 AbstractCegarLoop]: Abstraction has 1909 states and 2483 transitions. [2021-12-21 14:53:42,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:53:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2483 transitions. [2021-12-21 14:53:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:53:42,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:42,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:42,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:53:42,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:42,923 INFO L85 PathProgramCache]: Analyzing trace with hash 887089979, now seen corresponding path program 1 times [2021-12-21 14:53:42,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:42,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610500080] [2021-12-21 14:53:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:42,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 14:53:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:53:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:42,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:53:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:53:43,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:43,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610500080] [2021-12-21 14:53:43,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610500080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:43,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:43,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:43,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427013371] [2021-12-21 14:53:43,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:43,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:43,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:43,004 INFO L87 Difference]: Start difference. First operand 1909 states and 2483 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 14:53:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:43,429 INFO L93 Difference]: Finished difference Result 5506 states and 7191 transitions. [2021-12-21 14:53:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:53:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-21 14:53:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:43,445 INFO L225 Difference]: With dead ends: 5506 [2021-12-21 14:53:43,445 INFO L226 Difference]: Without dead ends: 3816 [2021-12-21 14:53:43,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:53:43,451 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 848 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:43,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 1487 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:53:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-12-21 14:53:43,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3596. [2021-12-21 14:53:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3596 states, 2830 states have (on average 1.2848056537102472) internal successors, (3636), 2890 states have internal predecessors, (3636), 402 states have call successors, (402), 272 states have call predecessors, (402), 362 states have return successors, (603), 438 states have call predecessors, (603), 398 states have call successors, (603) [2021-12-21 14:53:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 4641 transitions. [2021-12-21 14:53:43,604 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 4641 transitions. Word has length 91 [2021-12-21 14:53:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:43,604 INFO L470 AbstractCegarLoop]: Abstraction has 3596 states and 4641 transitions. [2021-12-21 14:53:43,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 14:53:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 4641 transitions. [2021-12-21 14:53:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:53:43,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:43,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:43,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:53:43,607 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash -170748099, now seen corresponding path program 1 times [2021-12-21 14:53:43,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:43,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695560658] [2021-12-21 14:53:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:43,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 14:53:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:53:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:53:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:53:43,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:43,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695560658] [2021-12-21 14:53:43,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695560658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:43,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:43,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:53:43,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664304564] [2021-12-21 14:53:43,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:43,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:53:43,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:53:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:53:43,658 INFO L87 Difference]: Start difference. First operand 3596 states and 4641 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:44,063 INFO L93 Difference]: Finished difference Result 5404 states and 6909 transitions. [2021-12-21 14:53:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 14:53:44,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-21 14:53:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:44,070 INFO L225 Difference]: With dead ends: 5404 [2021-12-21 14:53:44,071 INFO L226 Difference]: Without dead ends: 2027 [2021-12-21 14:53:44,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:53:44,076 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 500 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:44,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1261 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:53:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-12-21 14:53:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1909. [2021-12-21 14:53:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1516 states have (on average 1.2902374670184698) internal successors, (1956), 1542 states have internal predecessors, (1956), 213 states have call successors, (213), 140 states have call predecessors, (213), 178 states have return successors, (271), 229 states have call predecessors, (271), 209 states have call successors, (271) [2021-12-21 14:53:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2440 transitions. [2021-12-21 14:53:44,135 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2440 transitions. Word has length 91 [2021-12-21 14:53:44,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:44,135 INFO L470 AbstractCegarLoop]: Abstraction has 1909 states and 2440 transitions. [2021-12-21 14:53:44,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:53:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2440 transitions. [2021-12-21 14:53:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 14:53:44,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:44,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:44,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:53:44,137 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash -196498665, now seen corresponding path program 1 times [2021-12-21 14:53:44,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:44,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405416224] [2021-12-21 14:53:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:44,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:53:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:53:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:53:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:53:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 14:53:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:53:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 14:53:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:53:44,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:44,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405416224] [2021-12-21 14:53:44,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405416224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:44,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:44,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:53:44,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104990653] [2021-12-21 14:53:44,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:44,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:53:44,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:44,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:53:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:53:44,252 INFO L87 Difference]: Start difference. First operand 1909 states and 2440 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:53:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:45,429 INFO L93 Difference]: Finished difference Result 4718 states and 6019 transitions. [2021-12-21 14:53:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 14:53:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-21 14:53:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:45,438 INFO L225 Difference]: With dead ends: 4718 [2021-12-21 14:53:45,438 INFO L226 Difference]: Without dead ends: 2723 [2021-12-21 14:53:45,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-21 14:53:45,442 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 1551 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:45,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 1776 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:53:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-12-21 14:53:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2546. [2021-12-21 14:53:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 1994 states have (on average 1.2537612838515546) internal successors, (2500), 2029 states have internal predecessors, (2500), 292 states have call successors, (292), 189 states have call predecessors, (292), 258 states have return successors, (407), 330 states have call predecessors, (407), 288 states have call successors, (407) [2021-12-21 14:53:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3199 transitions. [2021-12-21 14:53:45,527 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3199 transitions. Word has length 92 [2021-12-21 14:53:45,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:45,527 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 3199 transitions. [2021-12-21 14:53:45,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:53:45,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3199 transitions. [2021-12-21 14:53:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:53:45,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:45,530 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] [2021-12-21 14:53:45,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:53:45,530 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash -140072605, now seen corresponding path program 1 times [2021-12-21 14:53:45,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:45,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351874420] [2021-12-21 14:53:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:45,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:53:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:53:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:53:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:53:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:45,588 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 14:53:45,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:45,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351874420] [2021-12-21 14:53:45,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351874420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:45,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:45,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:53:45,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688526444] [2021-12-21 14:53:45,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:45,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:53:45,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:53:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:53:45,609 INFO L87 Difference]: Start difference. First operand 2546 states and 3199 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 14:53:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:46,189 INFO L93 Difference]: Finished difference Result 2813 states and 3621 transitions. [2021-12-21 14:53:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:53:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 102 [2021-12-21 14:53:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:46,198 INFO L225 Difference]: With dead ends: 2813 [2021-12-21 14:53:46,198 INFO L226 Difference]: Without dead ends: 2611 [2021-12-21 14:53:46,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:53:46,200 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 628 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:46,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 935 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:53:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-12-21 14:53:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2546. [2021-12-21 14:53:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 1994 states have (on average 1.253259779338014) internal successors, (2499), 2029 states have internal predecessors, (2499), 292 states have call successors, (292), 189 states have call predecessors, (292), 258 states have return successors, (407), 330 states have call predecessors, (407), 288 states have call successors, (407) [2021-12-21 14:53:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3198 transitions. [2021-12-21 14:53:46,431 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3198 transitions. Word has length 102 [2021-12-21 14:53:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:46,432 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 3198 transitions. [2021-12-21 14:53:46,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 14:53:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3198 transitions. [2021-12-21 14:53:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:53:46,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:46,434 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] [2021-12-21 14:53:46,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:53:46,434 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:46,435 INFO L85 PathProgramCache]: Analyzing trace with hash 743436385, now seen corresponding path program 1 times [2021-12-21 14:53:46,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:46,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766298631] [2021-12-21 14:53:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:46,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:53:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:53:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:53:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:53:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:46,503 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 14:53:46,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766298631] [2021-12-21 14:53:46,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766298631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:46,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:46,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:53:46,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886407798] [2021-12-21 14:53:46,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:46,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:53:46,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:46,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:53:46,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:53:46,506 INFO L87 Difference]: Start difference. First operand 2546 states and 3198 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 14:53:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:47,685 INFO L93 Difference]: Finished difference Result 3072 states and 4029 transitions. [2021-12-21 14:53:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:53:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 102 [2021-12-21 14:53:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:47,695 INFO L225 Difference]: With dead ends: 3072 [2021-12-21 14:53:47,695 INFO L226 Difference]: Without dead ends: 2876 [2021-12-21 14:53:47,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:53:47,696 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 1005 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:47,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 1261 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:53:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-12-21 14:53:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2745. [2021-12-21 14:53:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2172 states have (on average 1.2790055248618784) internal successors, (2778), 2208 states have internal predecessors, (2778), 306 states have call successors, (306), 195 states have call predecessors, (306), 265 states have return successors, (424), 344 states have call predecessors, (424), 302 states have call successors, (424) [2021-12-21 14:53:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 3508 transitions. [2021-12-21 14:53:47,806 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 3508 transitions. Word has length 102 [2021-12-21 14:53:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:47,806 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 3508 transitions. [2021-12-21 14:53:47,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 14:53:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 3508 transitions. [2021-12-21 14:53:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:53:47,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:47,808 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] [2021-12-21 14:53:47,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:53:47,809 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash -940378787, now seen corresponding path program 1 times [2021-12-21 14:53:47,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:47,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84547298] [2021-12-21 14:53:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:47,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:47,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:47,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:53:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:47,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:53:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:47,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:53:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:47,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:53:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:47,884 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 14:53:47,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84547298] [2021-12-21 14:53:47,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84547298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:47,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:47,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:47,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867565669] [2021-12-21 14:53:47,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:47,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:47,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:47,886 INFO L87 Difference]: Start difference. First operand 2745 states and 3508 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:49,117 INFO L93 Difference]: Finished difference Result 3542 states and 4766 transitions. [2021-12-21 14:53:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-21 14:53:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:49,128 INFO L225 Difference]: With dead ends: 3542 [2021-12-21 14:53:49,128 INFO L226 Difference]: Without dead ends: 3147 [2021-12-21 14:53:49,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:49,131 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 1008 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:49,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 1999 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:53:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-12-21 14:53:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2932. [2021-12-21 14:53:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2338 states have (on average 1.297262617621899) internal successors, (3033), 2375 states have internal predecessors, (3033), 320 states have call successors, (320), 201 states have call predecessors, (320), 272 states have return successors, (440), 359 states have call predecessors, (440), 316 states have call successors, (440) [2021-12-21 14:53:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 3793 transitions. [2021-12-21 14:53:49,244 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 3793 transitions. Word has length 102 [2021-12-21 14:53:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:49,245 INFO L470 AbstractCegarLoop]: Abstraction has 2932 states and 3793 transitions. [2021-12-21 14:53:49,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 3793 transitions. [2021-12-21 14:53:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:53:49,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:49,247 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] [2021-12-21 14:53:49,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:53:49,247 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1475457563, now seen corresponding path program 1 times [2021-12-21 14:53:49,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:49,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578594454] [2021-12-21 14:53:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:49,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:49,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:49,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:53:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:49,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:53:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:49,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:53:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:49,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:53:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:49,317 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 14:53:49,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578594454] [2021-12-21 14:53:49,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578594454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:49,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:49,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:49,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038007938] [2021-12-21 14:53:49,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:49,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:49,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:49,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:49,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:49,319 INFO L87 Difference]: Start difference. First operand 2932 states and 3793 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:50,708 INFO L93 Difference]: Finished difference Result 4232 states and 5839 transitions. [2021-12-21 14:53:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-21 14:53:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:50,720 INFO L225 Difference]: With dead ends: 4232 [2021-12-21 14:53:50,720 INFO L226 Difference]: Without dead ends: 3650 [2021-12-21 14:53:50,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:50,723 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 1004 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:50,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 1988 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 14:53:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2021-12-21 14:53:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 3309. [2021-12-21 14:53:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 2673 states have (on average 1.3273475495697717) internal successors, (3548), 2712 states have internal predecessors, (3548), 348 states have call successors, (348), 213 states have call predecessors, (348), 286 states have return successors, (476), 389 states have call predecessors, (476), 344 states have call successors, (476) [2021-12-21 14:53:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4372 transitions. [2021-12-21 14:53:50,880 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 4372 transitions. Word has length 102 [2021-12-21 14:53:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:50,880 INFO L470 AbstractCegarLoop]: Abstraction has 3309 states and 4372 transitions. [2021-12-21 14:53:50,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 4372 transitions. [2021-12-21 14:53:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:53:50,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:50,882 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] [2021-12-21 14:53:50,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:53:50,883 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1494653539, now seen corresponding path program 1 times [2021-12-21 14:53:50,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:50,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568763494] [2021-12-21 14:53:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:50,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:53:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:53:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:53:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:53:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:50,948 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 14:53:50,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:50,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568763494] [2021-12-21 14:53:50,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568763494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:50,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:50,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:50,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614842777] [2021-12-21 14:53:50,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:50,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:50,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:50,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:50,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:50,950 INFO L87 Difference]: Start difference. First operand 3309 states and 4372 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:52,323 INFO L93 Difference]: Finished difference Result 5571 states and 7918 transitions. [2021-12-21 14:53:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-21 14:53:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:52,351 INFO L225 Difference]: With dead ends: 5571 [2021-12-21 14:53:52,352 INFO L226 Difference]: Without dead ends: 4612 [2021-12-21 14:53:52,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:52,359 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 1003 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:52,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 1983 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:53:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-12-21 14:53:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 4066. [2021-12-21 14:53:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 3346 states have (on average 1.3693962940824866) internal successors, (4582), 3389 states have internal predecessors, (4582), 404 states have call successors, (404), 237 states have call predecessors, (404), 314 states have return successors, (554), 449 states have call predecessors, (554), 400 states have call successors, (554) [2021-12-21 14:53:52,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 5540 transitions. [2021-12-21 14:53:52,546 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 5540 transitions. Word has length 102 [2021-12-21 14:53:52,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:52,546 INFO L470 AbstractCegarLoop]: Abstraction has 4066 states and 5540 transitions. [2021-12-21 14:53:52,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 5540 transitions. [2021-12-21 14:53:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:53:52,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:52,548 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] [2021-12-21 14:53:52,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:53:52,549 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:52,549 INFO L85 PathProgramCache]: Analyzing trace with hash 72104411, now seen corresponding path program 1 times [2021-12-21 14:53:52,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:52,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979981873] [2021-12-21 14:53:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:52,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:53:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:53:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:53:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:53:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:52,622 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 14:53:52,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:52,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979981873] [2021-12-21 14:53:52,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979981873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:52,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:52,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:52,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543193819] [2021-12-21 14:53:52,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:52,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:52,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:52,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:52,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:52,623 INFO L87 Difference]: Start difference. First operand 4066 states and 5540 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:54,013 INFO L93 Difference]: Finished difference Result 8250 states and 12096 transitions. [2021-12-21 14:53:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:53:54,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-21 14:53:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:54,032 INFO L225 Difference]: With dead ends: 8250 [2021-12-21 14:53:54,033 INFO L226 Difference]: Without dead ends: 6534 [2021-12-21 14:53:54,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:53:54,042 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 1002 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:54,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 1978 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:53:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2021-12-21 14:53:54,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5587. [2021-12-21 14:53:54,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 4699 states have (on average 1.4173228346456692) internal successors, (6660), 4750 states have internal predecessors, (6660), 516 states have call successors, (516), 285 states have call predecessors, (516), 370 states have return successors, (728), 569 states have call predecessors, (728), 512 states have call successors, (728) [2021-12-21 14:53:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 7904 transitions. [2021-12-21 14:53:54,296 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 7904 transitions. Word has length 102 [2021-12-21 14:53:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:54,296 INFO L470 AbstractCegarLoop]: Abstraction has 5587 states and 7904 transitions. [2021-12-21 14:53:54,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 7904 transitions. [2021-12-21 14:53:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:53:54,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:54,299 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] [2021-12-21 14:53:54,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:53:54,299 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -985733667, now seen corresponding path program 1 times [2021-12-21 14:53:54,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:54,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726585956] [2021-12-21 14:53:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:54,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:53:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:53:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:53:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:53:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:54,374 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 14:53:54,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:54,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726585956] [2021-12-21 14:53:54,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726585956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:54,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:54,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:54,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267978417] [2021-12-21 14:53:54,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:54,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:54,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:54,377 INFO L87 Difference]: Start difference. First operand 5587 states and 7904 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:56,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:56,385 INFO L93 Difference]: Finished difference Result 14873 states and 22404 transitions. [2021-12-21 14:53:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:53:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-21 14:53:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:56,415 INFO L225 Difference]: With dead ends: 14873 [2021-12-21 14:53:56,415 INFO L226 Difference]: Without dead ends: 11636 [2021-12-21 14:53:56,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:53:56,424 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 1054 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:56,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 2051 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:53:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11636 states. [2021-12-21 14:53:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11636 to 8596. [2021-12-21 14:53:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 7388 states have (on average 1.4626421223605848) internal successors, (10806), 7455 states have internal predecessors, (10806), 724 states have call successors, (724), 381 states have call predecessors, (724), 482 states have return successors, (1114), 793 states have call predecessors, (1114), 720 states have call successors, (1114) [2021-12-21 14:53:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 12644 transitions. [2021-12-21 14:53:56,888 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 12644 transitions. Word has length 102 [2021-12-21 14:53:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:56,891 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 12644 transitions. [2021-12-21 14:53:56,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 12644 transitions. [2021-12-21 14:53:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:53:56,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:56,899 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] [2021-12-21 14:53:56,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:53:56,899 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2128236133, now seen corresponding path program 1 times [2021-12-21 14:53:56,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:56,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755435948] [2021-12-21 14:53:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:56,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:53:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:53:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:53:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:53:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:56,975 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 14:53:56,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755435948] [2021-12-21 14:53:56,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755435948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:56,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:56,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:56,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661167589] [2021-12-21 14:53:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:56,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:56,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:56,977 INFO L87 Difference]: Start difference. First operand 8596 states and 12644 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:53:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:59,140 INFO L93 Difference]: Finished difference Result 26328 states and 40522 transitions. [2021-12-21 14:53:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:53:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-21 14:53:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:59,197 INFO L225 Difference]: With dead ends: 26328 [2021-12-21 14:53:59,197 INFO L226 Difference]: Without dead ends: 20082 [2021-12-21 14:53:59,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:53:59,220 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 1214 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:59,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1244 Valid, 1484 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:53:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20082 states. [2021-12-21 14:53:59,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20082 to 14277. [2021-12-21 14:54:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14277 states, 12445 states have (on average 1.4894335074327039) internal successors, (18536), 12544 states have internal predecessors, (18536), 1124 states have call successors, (1124), 573 states have call predecessors, (1124), 706 states have return successors, (2032), 1225 states have call predecessors, (2032), 1120 states have call successors, (2032) [2021-12-21 14:54:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14277 states to 14277 states and 21692 transitions. [2021-12-21 14:54:00,041 INFO L78 Accepts]: Start accepts. Automaton has 14277 states and 21692 transitions. Word has length 102 [2021-12-21 14:54:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:54:00,042 INFO L470 AbstractCegarLoop]: Abstraction has 14277 states and 21692 transitions. [2021-12-21 14:54:00,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:54:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 14277 states and 21692 transitions. [2021-12-21 14:54:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:54:00,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:54:00,051 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] [2021-12-21 14:54:00,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:54:00,051 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:54:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:54:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1887996387, now seen corresponding path program 1 times [2021-12-21 14:54:00,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:54:00,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295864554] [2021-12-21 14:54:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:54:00,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:54:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:54:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:54:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:54:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:54:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:54:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:00,116 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 14:54:00,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:54:00,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295864554] [2021-12-21 14:54:00,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295864554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:54:00,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:54:00,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:54:00,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812315479] [2021-12-21 14:54:00,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:54:00,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:54:00,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:54:00,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:54:00,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:54:00,119 INFO L87 Difference]: Start difference. First operand 14277 states and 21692 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:54:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:54:03,446 INFO L93 Difference]: Finished difference Result 47687 states and 74704 transitions. [2021-12-21 14:54:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:54:03,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-21 14:54:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:54:03,612 INFO L225 Difference]: With dead ends: 47687 [2021-12-21 14:54:03,612 INFO L226 Difference]: Without dead ends: 35760 [2021-12-21 14:54:03,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:54:03,662 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 1035 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:54:03,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 2011 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:54:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35760 states. [2021-12-21 14:54:05,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35760 to 25926. [2021-12-21 14:54:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25926 states, 22878 states have (on average 1.5124573826383425) internal successors, (34602), 23041 states have internal predecessors, (34602), 1892 states have call successors, (1892), 957 states have call predecessors, (1892), 1154 states have return successors, (4322), 2057 states have call predecessors, (4322), 1888 states have call successors, (4322) [2021-12-21 14:54:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25926 states to 25926 states and 40816 transitions. [2021-12-21 14:54:05,240 INFO L78 Accepts]: Start accepts. Automaton has 25926 states and 40816 transitions. Word has length 102 [2021-12-21 14:54:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:54:05,240 INFO L470 AbstractCegarLoop]: Abstraction has 25926 states and 40816 transitions. [2021-12-21 14:54:05,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:54:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 25926 states and 40816 transitions. [2021-12-21 14:54:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:54:05,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:54:05,258 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] [2021-12-21 14:54:05,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:54:05,258 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:54:05,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:54:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1048962725, now seen corresponding path program 1 times [2021-12-21 14:54:05,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:54:05,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217373687] [2021-12-21 14:54:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:54:05,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:54:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:05,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:54:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:05,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:54:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:05,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:54:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:05,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:54:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:05,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:54:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:05,323 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 14:54:05,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:54:05,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217373687] [2021-12-21 14:54:05,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217373687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:54:05,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:54:05,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:54:05,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444003294] [2021-12-21 14:54:05,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:54:05,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:54:05,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:54:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:54:05,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:54:05,325 INFO L87 Difference]: Start difference. First operand 25926 states and 40816 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:54:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:54:10,023 INFO L93 Difference]: Finished difference Result 88196 states and 141970 transitions. [2021-12-21 14:54:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:54:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-21 14:54:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:54:10,240 INFO L225 Difference]: With dead ends: 88196 [2021-12-21 14:54:10,240 INFO L226 Difference]: Without dead ends: 64620 [2021-12-21 14:54:10,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:54:10,323 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 1054 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:54:10,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 1942 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:54:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64620 states. [2021-12-21 14:54:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64620 to 49288. [2021-12-21 14:54:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49288 states, 43872 states have (on average 1.5284008023340627) internal successors, (67054), 44163 states have internal predecessors, (67054), 3364 states have call successors, (3364), 1725 states have call predecessors, (3364), 2050 states have return successors, (10296), 3657 states have call predecessors, (10296), 3360 states have call successors, (10296) [2021-12-21 14:54:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49288 states to 49288 states and 80714 transitions. [2021-12-21 14:54:13,308 INFO L78 Accepts]: Start accepts. Automaton has 49288 states and 80714 transitions. Word has length 102 [2021-12-21 14:54:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:54:13,308 INFO L470 AbstractCegarLoop]: Abstraction has 49288 states and 80714 transitions. [2021-12-21 14:54:13,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:54:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 49288 states and 80714 transitions. [2021-12-21 14:54:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:54:13,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:54:13,534 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] [2021-12-21 14:54:13,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:54:13,535 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:54:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:54:13,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1168667673, now seen corresponding path program 1 times [2021-12-21 14:54:13,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:54:13,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945662877] [2021-12-21 14:54:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:54:13,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:54:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:13,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:54:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:13,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:54:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:13,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:54:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:13,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:54:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:13,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:54:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:13,598 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 14:54:13,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:54:13,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945662877] [2021-12-21 14:54:13,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945662877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:54:13,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:54:13,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:54:13,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911058835] [2021-12-21 14:54:13,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:54:13,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:54:13,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:54:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:54:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:54:13,600 INFO L87 Difference]: Start difference. First operand 49288 states and 80714 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:54:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:54:21,654 INFO L93 Difference]: Finished difference Result 168900 states and 281642 transitions. [2021-12-21 14:54:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:54:21,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2021-12-21 14:54:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:54:22,156 INFO L225 Difference]: With dead ends: 168900 [2021-12-21 14:54:22,156 INFO L226 Difference]: Without dead ends: 121962 [2021-12-21 14:54:22,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:54:22,506 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 999 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:54:22,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1950 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:54:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121962 states. [2021-12-21 14:54:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121962 to 95881. [2021-12-21 14:54:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95881 states, 85857 states have (on average 1.538371944046496) internal successors, (132080), 86404 states have internal predecessors, (132080), 6180 states have call successors, (6180), 3261 states have call predecessors, (6180), 3842 states have return successors, (26490), 6729 states have call predecessors, (26490), 6176 states have call successors, (26490) [2021-12-21 14:54:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95881 states to 95881 states and 164750 transitions. [2021-12-21 14:54:28,531 INFO L78 Accepts]: Start accepts. Automaton has 95881 states and 164750 transitions. Word has length 102 [2021-12-21 14:54:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:54:28,531 INFO L470 AbstractCegarLoop]: Abstraction has 95881 states and 164750 transitions. [2021-12-21 14:54:28,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 14:54:28,531 INFO L276 IsEmpty]: Start isEmpty. Operand 95881 states and 164750 transitions. [2021-12-21 14:54:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 14:54:28,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:54:28,607 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] [2021-12-21 14:54:28,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:54:28,616 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:54:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:54:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1392195173, now seen corresponding path program 1 times [2021-12-21 14:54:28,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:54:28,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687277228] [2021-12-21 14:54:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:54:28,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:54:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:28,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:54:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:28,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 14:54:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:28,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 14:54:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:28,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 14:54:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:28,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 14:54:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:54:28,718 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 14:54:28,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:54:28,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687277228] [2021-12-21 14:54:28,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687277228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:54:28,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:54:28,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:54:28,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326350030] [2021-12-21 14:54:28,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:54:28,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:54:28,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:54:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:54:28,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:54:28,720 INFO L87 Difference]: Start difference. First operand 95881 states and 164750 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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)