./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 e19ca921 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-e19ca92 [2021-12-22 13:14:44,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:14:44,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:14:44,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:14:44,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:14:44,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:14:44,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:14:44,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:14:44,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:14:44,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:14:44,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:14:44,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:14:44,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:14:44,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:14:44,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:14:44,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:14:44,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:14:44,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:14:44,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:14:44,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:14:44,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:14:44,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:14:44,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:14:44,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:14:44,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:14:44,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:14:44,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:14:44,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:14:44,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:14:44,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:14:44,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:14:44,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:14:44,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:14:44,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:14:44,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:14:44,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:14:44,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:14:44,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:14:44,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:14:44,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:14:44,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:14:44,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:14:44,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:14:44,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:14:44,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:14:44,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:14:44,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:14:44,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:14:44,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:14:44,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:14:44,468 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:14:44,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:14:44,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:14:44,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:14:44,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:14:44,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:14:44,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:14:44,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:14:44,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:14:44,471 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:14:44,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:14:44,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:14:44,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:14:44,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:14:44,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:14:44,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:14:44,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:14:44,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:14:44,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:14:44,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:14:44,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:14:44,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:14:44,474 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:14:44,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:14:44,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:14:44,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:14:44,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8067f6f3f9b2e7af84aa5945c9ed2ea4ff7d9ddfc1aa86a10fb4bb83ea8bdef8 [2021-12-22 13:14:44,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:14:44,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:14:44,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:14:44,711 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:14:44,711 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:14:44,712 INFO L432 ainManager$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 [2021-12-22 13:14:44,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c31e95ab/9d31a667877b4b3ca3db5e9f3edc16ac/FLAG67789c406 [2021-12-22 13:14:45,185 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:14:45,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-2.c [2021-12-22 13:14:45,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c31e95ab/9d31a667877b4b3ca3db5e9f3edc16ac/FLAG67789c406 [2021-12-22 13:14:45,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c31e95ab/9d31a667877b4b3ca3db5e9f3edc16ac [2021-12-22 13:14:45,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:14:45,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:14:45,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:14:45,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:14:45,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:14:45,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dabc2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45, skipping insertion in model container [2021-12-22 13:14:45,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:14:45,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:14:45,363 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] [2021-12-22 13:14:45,427 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] [2021-12-22 13:14:45,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:14:45,492 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:14:45,508 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] [2021-12-22 13:14:45,531 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] [2021-12-22 13:14:45,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:14:45,588 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:14:45,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45 WrapperNode [2021-12-22 13:14:45,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:14:45,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:14:45,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:14:45,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:14:45,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,636 INFO L137 Inliner]: procedures = 65, calls = 77, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 677 [2021-12-22 13:14:45,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:14:45,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:14:45,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:14:45,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:14:45,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:14:45,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:14:45,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:14:45,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:14:45,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (1/1) ... [2021-12-22 13:14:45,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:14:45,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:14:45,752 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) [2021-12-22 13:14:45,754 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 [2021-12-22 13:14:45,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:14:45,788 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:14:45,788 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:14:45,788 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-22 13:14:45,791 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-22 13:14:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:14:45,791 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:14:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:14:45,792 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:14:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-22 13:14:45,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-22 13:14:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:14:45,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:14:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:14:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:14:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-22 13:14:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-22 13:14:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-22 13:14:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-22 13:14:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-22 13:14:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-22 13:14:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:14:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:14:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:14:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:14:45,793 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:14:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-22 13:14:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-22 13:14:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:14:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:14:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:14:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:14:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:14:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:14:45,879 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:14:45,880 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:14:46,460 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-22 13:14:46,462 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; [2021-12-22 13:14:46,532 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:14:46,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:14:46,544 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-12-22 13:14:46,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:14:46 BoogieIcfgContainer [2021-12-22 13:14:46,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:14:46,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:14:46,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:14:46,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:14:46,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:14:45" (1/3) ... [2021-12-22 13:14:46,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f857833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:14:46, skipping insertion in model container [2021-12-22 13:14:46,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:45" (2/3) ... [2021-12-22 13:14:46,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f857833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:14:46, skipping insertion in model container [2021-12-22 13:14:46,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:14:46" (3/3) ... [2021-12-22 13:14:46,552 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.05.cil-2.c [2021-12-22 13:14:46,556 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:14:46,557 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:14:46,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:14:46,600 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 [2021-12-22 13:14:46,600 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:14:46,621 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) [2021-12-22 13:14:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:14:46,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:46,632 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] [2021-12-22 13:14:46,633 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash 481480506, now seen corresponding path program 1 times [2021-12-22 13:14:46,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:46,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081888838] [2021-12-22 13:14:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:46,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:46,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:47,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081888838] [2021-12-22 13:14:47,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081888838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:47,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:47,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:14:47,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889775907] [2021-12-22 13:14:47,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:47,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:14:47,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:47,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:14:47,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:47,079 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) [2021-12-22 13:14:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:48,028 INFO L93 Difference]: Finished difference Result 793 states and 1237 transitions. [2021-12-22 13:14:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:48,030 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 [2021-12-22 13:14:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:48,043 INFO L225 Difference]: With dead ends: 793 [2021-12-22 13:14:48,043 INFO L226 Difference]: Without dead ends: 472 [2021-12-22 13:14:48,048 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 [2021-12-22 13:14:48,050 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 1089 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:48,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 1468 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:14:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-22 13:14:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 433. [2021-12-22 13:14:48,133 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) [2021-12-22 13:14:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 636 transitions. [2021-12-22 13:14:48,138 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 636 transitions. Word has length 65 [2021-12-22 13:14:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:48,138 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 636 transitions. [2021-12-22 13:14:48,139 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) [2021-12-22 13:14:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 636 transitions. [2021-12-22 13:14:48,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:14:48,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:48,143 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] [2021-12-22 13:14:48,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:14:48,143 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2134598150, now seen corresponding path program 1 times [2021-12-22 13:14:48,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:48,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253830710] [2021-12-22 13:14:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:48,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:48,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:48,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253830710] [2021-12-22 13:14:48,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253830710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:48,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:48,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:14:48,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128374073] [2021-12-22 13:14:48,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:48,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:14:48,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:14:48,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:48,267 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) [2021-12-22 13:14:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:49,157 INFO L93 Difference]: Finished difference Result 830 states and 1202 transitions. [2021-12-22 13:14:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:14:49,158 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 [2021-12-22 13:14:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:49,167 INFO L225 Difference]: With dead ends: 830 [2021-12-22 13:14:49,168 INFO L226 Difference]: Without dead ends: 621 [2021-12-22 13:14:49,168 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 [2021-12-22 13:14:49,169 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 1160 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:49,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1580 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:14:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-12-22 13:14:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 545. [2021-12-22 13:14:49,209 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) [2021-12-22 13:14:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 796 transitions. [2021-12-22 13:14:49,213 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 796 transitions. Word has length 65 [2021-12-22 13:14:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:49,213 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 796 transitions. [2021-12-22 13:14:49,213 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) [2021-12-22 13:14:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 796 transitions. [2021-12-22 13:14:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:14:49,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:49,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:49,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:14:49,217 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:49,218 INFO L85 PathProgramCache]: Analyzing trace with hash 131783036, now seen corresponding path program 1 times [2021-12-22 13:14:49,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:49,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570023955] [2021-12-22 13:14:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:49,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:49,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:49,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570023955] [2021-12-22 13:14:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570023955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:49,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:49,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:14:49,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824715547] [2021-12-22 13:14:49,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:49,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:14:49,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:14:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:14:49,340 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) [2021-12-22 13:14:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:51,057 INFO L93 Difference]: Finished difference Result 2091 states and 2994 transitions. [2021-12-22 13:14:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:14:51,058 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 [2021-12-22 13:14:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:51,066 INFO L225 Difference]: With dead ends: 2091 [2021-12-22 13:14:51,067 INFO L226 Difference]: Without dead ends: 1758 [2021-12-22 13:14:51,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:14:51,070 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 2668 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:51,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2690 Valid, 2377 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:14:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-12-22 13:14:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1598. [2021-12-22 13:14:51,145 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) [2021-12-22 13:14:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2183 transitions. [2021-12-22 13:14:51,152 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2183 transitions. Word has length 65 [2021-12-22 13:14:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:51,153 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 2183 transitions. [2021-12-22 13:14:51,153 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) [2021-12-22 13:14:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2183 transitions. [2021-12-22 13:14:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:14:51,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:51,155 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] [2021-12-22 13:14:51,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:14:51,156 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash 754147135, now seen corresponding path program 1 times [2021-12-22 13:14:51,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:51,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546186882] [2021-12-22 13:14:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:51,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:14:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:51,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546186882] [2021-12-22 13:14:51,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546186882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:51,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:51,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:14:51,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980314445] [2021-12-22 13:14:51,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:51,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:14:51,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:51,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:14:51,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:51,291 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) [2021-12-22 13:14:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:51,998 INFO L93 Difference]: Finished difference Result 3126 states and 4262 transitions. [2021-12-22 13:14:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:14:51,998 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 [2021-12-22 13:14:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:52,008 INFO L225 Difference]: With dead ends: 3126 [2021-12-22 13:14:52,008 INFO L226 Difference]: Without dead ends: 1746 [2021-12-22 13:14:52,012 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 [2021-12-22 13:14:52,020 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 576 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:52,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 2061 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:14:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-12-22 13:14:52,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1638. [2021-12-22 13:14:52,123 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) [2021-12-22 13:14:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2217 transitions. [2021-12-22 13:14:52,131 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2217 transitions. Word has length 66 [2021-12-22 13:14:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:52,132 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2217 transitions. [2021-12-22 13:14:52,132 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) [2021-12-22 13:14:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2217 transitions. [2021-12-22 13:14:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:14:52,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:52,133 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] [2021-12-22 13:14:52,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:14:52,134 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:52,135 INFO L85 PathProgramCache]: Analyzing trace with hash -275212163, now seen corresponding path program 1 times [2021-12-22 13:14:52,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:52,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821985978] [2021-12-22 13:14:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:52,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 13:14:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:52,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:52,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821985978] [2021-12-22 13:14:52,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821985978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:52,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:52,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:14:52,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869192106] [2021-12-22 13:14:52,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:52,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:14:52,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:14:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:14:52,269 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) [2021-12-22 13:14:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:53,965 INFO L93 Difference]: Finished difference Result 5210 states and 7091 transitions. [2021-12-22 13:14:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:14:53,965 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 [2021-12-22 13:14:53,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:53,975 INFO L225 Difference]: With dead ends: 5210 [2021-12-22 13:14:53,975 INFO L226 Difference]: Without dead ends: 2029 [2021-12-22 13:14:53,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:14:53,986 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 2774 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:53,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2796 Valid, 2401 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:14:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-12-22 13:14:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1849. [2021-12-22 13:14:54,058 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) [2021-12-22 13:14:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2429 transitions. [2021-12-22 13:14:54,066 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2429 transitions. Word has length 66 [2021-12-22 13:14:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:54,066 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2429 transitions. [2021-12-22 13:14:54,066 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) [2021-12-22 13:14:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2429 transitions. [2021-12-22 13:14:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:14:54,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:54,069 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] [2021-12-22 13:14:54,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:14:54,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash 443189305, now seen corresponding path program 1 times [2021-12-22 13:14:54,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:54,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138427125] [2021-12-22 13:14:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:54,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:14:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:14:54,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138427125] [2021-12-22 13:14:54,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138427125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:54,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:54,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:14:54,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801581236] [2021-12-22 13:14:54,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:54,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:14:54,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:14:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:54,198 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) [2021-12-22 13:14:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:54,914 INFO L93 Difference]: Finished difference Result 3674 states and 4831 transitions. [2021-12-22 13:14:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:14:54,915 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 [2021-12-22 13:14:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:54,925 INFO L225 Difference]: With dead ends: 3674 [2021-12-22 13:14:54,925 INFO L226 Difference]: Without dead ends: 2043 [2021-12-22 13:14:54,929 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 [2021-12-22 13:14:54,930 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 384 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:54,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 2203 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 13:14:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-12-22 13:14:54,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1909. [2021-12-22 13:14:55,000 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) [2021-12-22 13:14:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2483 transitions. [2021-12-22 13:14:55,008 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2483 transitions. Word has length 91 [2021-12-22 13:14:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:55,010 INFO L470 AbstractCegarLoop]: Abstraction has 1909 states and 2483 transitions. [2021-12-22 13:14:55,010 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) [2021-12-22 13:14:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2483 transitions. [2021-12-22 13:14:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:14:55,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:55,016 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] [2021-12-22 13:14:55,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:14:55,016 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:55,017 INFO L85 PathProgramCache]: Analyzing trace with hash 887089979, now seen corresponding path program 1 times [2021-12-22 13:14:55,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:55,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710716126] [2021-12-22 13:14:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:55,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:14:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:14:55,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:55,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710716126] [2021-12-22 13:14:55,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710716126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:55,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:55,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:55,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131503539] [2021-12-22 13:14:55,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:55,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:55,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:55,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:55,098 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) [2021-12-22 13:14:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:55,619 INFO L93 Difference]: Finished difference Result 5506 states and 7191 transitions. [2021-12-22 13:14:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:14:55,620 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 [2021-12-22 13:14:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:55,638 INFO L225 Difference]: With dead ends: 5506 [2021-12-22 13:14:55,638 INFO L226 Difference]: Without dead ends: 3816 [2021-12-22 13:14:55,643 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 [2021-12-22 13:14:55,645 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 848 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:55,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 1456 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:14:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-12-22 13:14:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3596. [2021-12-22 13:14:55,807 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) [2021-12-22 13:14:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 4641 transitions. [2021-12-22 13:14:55,818 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 4641 transitions. Word has length 91 [2021-12-22 13:14:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:55,819 INFO L470 AbstractCegarLoop]: Abstraction has 3596 states and 4641 transitions. [2021-12-22 13:14:55,819 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) [2021-12-22 13:14:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 4641 transitions. [2021-12-22 13:14:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 13:14:55,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:55,822 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] [2021-12-22 13:14:55,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:14:55,823 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:55,823 INFO L85 PathProgramCache]: Analyzing trace with hash -170748099, now seen corresponding path program 1 times [2021-12-22 13:14:55,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:55,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869655113] [2021-12-22 13:14:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:55,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 13:14:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:14:55,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869655113] [2021-12-22 13:14:55,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869655113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:55,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:55,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:14:55,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997480611] [2021-12-22 13:14:55,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:55,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:55,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:55,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:14:55,897 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) [2021-12-22 13:14:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:56,317 INFO L93 Difference]: Finished difference Result 5404 states and 6909 transitions. [2021-12-22 13:14:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:14:56,317 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 [2021-12-22 13:14:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:56,326 INFO L225 Difference]: With dead ends: 5404 [2021-12-22 13:14:56,326 INFO L226 Difference]: Without dead ends: 2027 [2021-12-22 13:14:56,334 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 [2021-12-22 13:14:56,334 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 500 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-22 13:14:56,335 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] [2021-12-22 13:14:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-12-22 13:14:56,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1909. [2021-12-22 13:14:56,430 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) [2021-12-22 13:14:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2440 transitions. [2021-12-22 13:14:56,436 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2440 transitions. Word has length 91 [2021-12-22 13:14:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:56,436 INFO L470 AbstractCegarLoop]: Abstraction has 1909 states and 2440 transitions. [2021-12-22 13:14:56,437 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) [2021-12-22 13:14:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2440 transitions. [2021-12-22 13:14:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 13:14:56,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:56,440 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] [2021-12-22 13:14:56,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:14:56,440 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:56,441 INFO L85 PathProgramCache]: Analyzing trace with hash -196498665, now seen corresponding path program 1 times [2021-12-22 13:14:56,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:56,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960375456] [2021-12-22 13:14:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:56,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 13:14:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 13:14:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:14:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 13:14:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:14:56,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:56,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960375456] [2021-12-22 13:14:56,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960375456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:56,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:56,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:14:56,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951444123] [2021-12-22 13:14:56,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:56,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:14:56,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:14:56,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:56,540 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) [2021-12-22 13:14:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:57,717 INFO L93 Difference]: Finished difference Result 4718 states and 6019 transitions. [2021-12-22 13:14:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 13:14:57,718 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 [2021-12-22 13:14:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:57,730 INFO L225 Difference]: With dead ends: 4718 [2021-12-22 13:14:57,731 INFO L226 Difference]: Without dead ends: 2723 [2021-12-22 13:14:57,735 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 [2021-12-22 13:14:57,738 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 1551 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:57,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 1777 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:14:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-12-22 13:14:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2546. [2021-12-22 13:14:57,849 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) [2021-12-22 13:14:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3199 transitions. [2021-12-22 13:14:57,856 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3199 transitions. Word has length 92 [2021-12-22 13:14:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:57,857 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 3199 transitions. [2021-12-22 13:14:57,857 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) [2021-12-22 13:14:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3199 transitions. [2021-12-22 13:14:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:14:57,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:57,859 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] [2021-12-22 13:14:57,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:14:57,860 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash -140072605, now seen corresponding path program 1 times [2021-12-22 13:14:57,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:57,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764351098] [2021-12-22 13:14:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:57,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:57,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:57,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:14:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:57,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:14:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:57,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:14:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:57,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:14:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:57,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:57,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764351098] [2021-12-22 13:14:57,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764351098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:57,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:57,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:14:57,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559524559] [2021-12-22 13:14:57,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:57,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:14:57,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:14:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:14:57,951 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) [2021-12-22 13:14:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:58,689 INFO L93 Difference]: Finished difference Result 2813 states and 3621 transitions. [2021-12-22 13:14:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:58,689 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 [2021-12-22 13:14:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:58,702 INFO L225 Difference]: With dead ends: 2813 [2021-12-22 13:14:58,702 INFO L226 Difference]: Without dead ends: 2611 [2021-12-22 13:14:58,704 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 [2021-12-22 13:14:58,705 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 628 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:58,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 935 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:14:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-12-22 13:14:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2546. [2021-12-22 13:14:58,869 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) [2021-12-22 13:14:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3198 transitions. [2021-12-22 13:14:58,876 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3198 transitions. Word has length 102 [2021-12-22 13:14:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:58,877 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 3198 transitions. [2021-12-22 13:14:58,877 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) [2021-12-22 13:14:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3198 transitions. [2021-12-22 13:14:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:14:58,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:58,879 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] [2021-12-22 13:14:58,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:14:58,880 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash 743436385, now seen corresponding path program 1 times [2021-12-22 13:14:58,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328358889] [2021-12-22 13:14:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:58,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:14:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:14:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:14:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:14:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:58,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:58,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328358889] [2021-12-22 13:14:58,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328358889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:58,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:58,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:14:58,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467307112] [2021-12-22 13:14:58,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:58,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:58,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:58,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:58,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:14:58,965 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) [2021-12-22 13:15:00,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:00,225 INFO L93 Difference]: Finished difference Result 3072 states and 4029 transitions. [2021-12-22 13:15:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:15:00,226 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 [2021-12-22 13:15:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:00,235 INFO L225 Difference]: With dead ends: 3072 [2021-12-22 13:15:00,236 INFO L226 Difference]: Without dead ends: 2876 [2021-12-22 13:15:00,237 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 [2021-12-22 13:15:00,237 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 1005 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:00,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 1261 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:15:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-12-22 13:15:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2745. [2021-12-22 13:15:00,369 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) [2021-12-22 13:15:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 3508 transitions. [2021-12-22 13:15:00,376 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 3508 transitions. Word has length 102 [2021-12-22 13:15:00,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:00,377 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 3508 transitions. [2021-12-22 13:15:00,377 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) [2021-12-22 13:15:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 3508 transitions. [2021-12-22 13:15:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:15:00,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:00,379 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] [2021-12-22 13:15:00,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:15:00,379 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash -940378787, now seen corresponding path program 1 times [2021-12-22 13:15:00,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:00,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489527774] [2021-12-22 13:15:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:00,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:15:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:15:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:15:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:15:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:15:00,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489527774] [2021-12-22 13:15:00,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489527774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:00,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:00,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:15:00,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624735947] [2021-12-22 13:15:00,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:00,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:15:00,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:00,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:15:00,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:00,492 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) [2021-12-22 13:15:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:01,956 INFO L93 Difference]: Finished difference Result 3542 states and 4766 transitions. [2021-12-22 13:15:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:15:01,957 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 [2021-12-22 13:15:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:01,968 INFO L225 Difference]: With dead ends: 3542 [2021-12-22 13:15:01,968 INFO L226 Difference]: Without dead ends: 3147 [2021-12-22 13:15:01,970 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 [2021-12-22 13:15:01,971 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 1008 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:01,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 1999 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:15:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-12-22 13:15:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2932. [2021-12-22 13:15:02,101 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) [2021-12-22 13:15:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 3793 transitions. [2021-12-22 13:15:02,109 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 3793 transitions. Word has length 102 [2021-12-22 13:15:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:02,110 INFO L470 AbstractCegarLoop]: Abstraction has 2932 states and 3793 transitions. [2021-12-22 13:15:02,110 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) [2021-12-22 13:15:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 3793 transitions. [2021-12-22 13:15:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:15:02,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:02,112 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] [2021-12-22 13:15:02,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:15:02,113 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:02,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1475457563, now seen corresponding path program 1 times [2021-12-22 13:15:02,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:02,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208757029] [2021-12-22 13:15:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:02,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:15:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:15:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:15:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:15:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:15:02,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208757029] [2021-12-22 13:15:02,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208757029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:02,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:02,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:15:02,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278816703] [2021-12-22 13:15:02,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:02,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:15:02,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:15:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:02,196 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) [2021-12-22 13:15:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:03,756 INFO L93 Difference]: Finished difference Result 4232 states and 5839 transitions. [2021-12-22 13:15:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:15:03,757 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 [2021-12-22 13:15:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:03,769 INFO L225 Difference]: With dead ends: 4232 [2021-12-22 13:15:03,769 INFO L226 Difference]: Without dead ends: 3650 [2021-12-22 13:15:03,771 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 [2021-12-22 13:15:03,772 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 1004 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:03,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 1988 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:15:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2021-12-22 13:15:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 3309. [2021-12-22 13:15:03,944 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) [2021-12-22 13:15:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4372 transitions. [2021-12-22 13:15:03,953 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 4372 transitions. Word has length 102 [2021-12-22 13:15:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:03,953 INFO L470 AbstractCegarLoop]: Abstraction has 3309 states and 4372 transitions. [2021-12-22 13:15:03,954 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) [2021-12-22 13:15:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 4372 transitions. [2021-12-22 13:15:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:15:03,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:03,956 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] [2021-12-22 13:15:03,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:15:03,957 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:03,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1494653539, now seen corresponding path program 1 times [2021-12-22 13:15:03,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:03,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455444023] [2021-12-22 13:15:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:03,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:03,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:15:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:15:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:15:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:15:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:15:04,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:04,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455444023] [2021-12-22 13:15:04,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455444023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:04,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:04,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:15:04,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198884285] [2021-12-22 13:15:04,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:04,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:15:04,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:15:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:04,063 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) [2021-12-22 13:15:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:05,460 INFO L93 Difference]: Finished difference Result 5571 states and 7918 transitions. [2021-12-22 13:15:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:15:05,463 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 [2021-12-22 13:15:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:05,502 INFO L225 Difference]: With dead ends: 5571 [2021-12-22 13:15:05,511 INFO L226 Difference]: Without dead ends: 4612 [2021-12-22 13:15:05,516 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 [2021-12-22 13:15:05,517 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, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:05,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 1983 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:15:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-12-22 13:15:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 4066. [2021-12-22 13:15:05,749 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) [2021-12-22 13:15:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 5540 transitions. [2021-12-22 13:15:05,759 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 5540 transitions. Word has length 102 [2021-12-22 13:15:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:05,760 INFO L470 AbstractCegarLoop]: Abstraction has 4066 states and 5540 transitions. [2021-12-22 13:15:05,760 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) [2021-12-22 13:15:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 5540 transitions. [2021-12-22 13:15:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:15:05,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:05,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:15:05,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:15:05,763 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash 72104411, now seen corresponding path program 1 times [2021-12-22 13:15:05,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:05,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970700184] [2021-12-22 13:15:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:05,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:05,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:05,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:15:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:05,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:15:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:05,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:15:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:05,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:15:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:15:05,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:05,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970700184] [2021-12-22 13:15:05,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970700184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:05,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:05,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:15:05,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874528507] [2021-12-22 13:15:05,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:05,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:15:05,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:15:05,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:05,857 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) [2021-12-22 13:15:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:07,384 INFO L93 Difference]: Finished difference Result 8250 states and 12096 transitions. [2021-12-22 13:15:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:15:07,384 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 [2021-12-22 13:15:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:07,431 INFO L225 Difference]: With dead ends: 8250 [2021-12-22 13:15:07,432 INFO L226 Difference]: Without dead ends: 6534 [2021-12-22 13:15:07,438 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 [2021-12-22 13:15:07,439 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 1002 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:07,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 1978 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:15:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2021-12-22 13:15:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5587. [2021-12-22 13:15:07,715 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) [2021-12-22 13:15:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 7904 transitions. [2021-12-22 13:15:07,732 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 7904 transitions. Word has length 102 [2021-12-22 13:15:07,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:07,732 INFO L470 AbstractCegarLoop]: Abstraction has 5587 states and 7904 transitions. [2021-12-22 13:15:07,732 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) [2021-12-22 13:15:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 7904 transitions. [2021-12-22 13:15:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:15:07,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:07,736 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] [2021-12-22 13:15:07,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:15:07,737 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:07,737 INFO L85 PathProgramCache]: Analyzing trace with hash -985733667, now seen corresponding path program 1 times [2021-12-22 13:15:07,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:07,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418151938] [2021-12-22 13:15:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:07,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:15:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:15:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:15:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:15:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:15:07,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:07,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418151938] [2021-12-22 13:15:07,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418151938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:07,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:07,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:15:07,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627554162] [2021-12-22 13:15:07,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:07,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:15:07,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:15:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:07,823 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) [2021-12-22 13:15:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:09,789 INFO L93 Difference]: Finished difference Result 14873 states and 22404 transitions. [2021-12-22 13:15:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:15:09,790 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 [2021-12-22 13:15:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:09,822 INFO L225 Difference]: With dead ends: 14873 [2021-12-22 13:15:09,823 INFO L226 Difference]: Without dead ends: 11636 [2021-12-22 13:15:09,836 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 [2021-12-22 13:15:09,837 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 [2021-12-22 13:15:09,837 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] [2021-12-22 13:15:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11636 states. [2021-12-22 13:15:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11636 to 8596. [2021-12-22 13:15:10,358 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) [2021-12-22 13:15:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 12644 transitions. [2021-12-22 13:15:10,382 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 12644 transitions. Word has length 102 [2021-12-22 13:15:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:10,382 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 12644 transitions. [2021-12-22 13:15:10,383 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) [2021-12-22 13:15:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 12644 transitions. [2021-12-22 13:15:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:15:10,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:10,389 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] [2021-12-22 13:15:10,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:15:10,390 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:10,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2128236133, now seen corresponding path program 1 times [2021-12-22 13:15:10,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:10,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921329973] [2021-12-22 13:15:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:10,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:10,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:10,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:15:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:10,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:15:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:10,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:15:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:10,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:15:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:15:10,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921329973] [2021-12-22 13:15:10,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921329973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:10,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:10,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:15:10,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935286296] [2021-12-22 13:15:10,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:10,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:15:10,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:15:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:10,480 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) [2021-12-22 13:15:13,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:13,007 INFO L93 Difference]: Finished difference Result 26328 states and 40522 transitions. [2021-12-22 13:15:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:15:13,007 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 [2021-12-22 13:15:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:13,080 INFO L225 Difference]: With dead ends: 26328 [2021-12-22 13:15:13,080 INFO L226 Difference]: Without dead ends: 20082 [2021-12-22 13:15:13,110 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 [2021-12-22 13:15:13,111 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 1214 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:13,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1244 Valid, 1484 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:15:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20082 states. [2021-12-22 13:15:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20082 to 14277. [2021-12-22 13:15:14,046 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) [2021-12-22 13:15:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14277 states to 14277 states and 21692 transitions. [2021-12-22 13:15:14,094 INFO L78 Accepts]: Start accepts. Automaton has 14277 states and 21692 transitions. Word has length 102 [2021-12-22 13:15:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:14,095 INFO L470 AbstractCegarLoop]: Abstraction has 14277 states and 21692 transitions. [2021-12-22 13:15:14,095 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) [2021-12-22 13:15:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14277 states and 21692 transitions. [2021-12-22 13:15:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:15:14,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:14,106 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] [2021-12-22 13:15:14,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:15:14,106 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:14,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1887996387, now seen corresponding path program 1 times [2021-12-22 13:15:14,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:14,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248138753] [2021-12-22 13:15:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:14,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:15:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:15:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:15:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:15:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:15:14,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:14,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248138753] [2021-12-22 13:15:14,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248138753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:14,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:14,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:15:14,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303372119] [2021-12-22 13:15:14,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:14,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:15:14,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:15:14,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:14,190 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) [2021-12-22 13:15:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:17,776 INFO L93 Difference]: Finished difference Result 47687 states and 74704 transitions. [2021-12-22 13:15:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:15:17,776 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 [2021-12-22 13:15:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:17,927 INFO L225 Difference]: With dead ends: 47687 [2021-12-22 13:15:17,927 INFO L226 Difference]: Without dead ends: 35760 [2021-12-22 13:15:17,977 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 [2021-12-22 13:15:17,978 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 1035 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:17,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 2011 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 13:15:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35760 states. [2021-12-22 13:15:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35760 to 25926. [2021-12-22 13:15:19,526 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) [2021-12-22 13:15:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25926 states to 25926 states and 40816 transitions. [2021-12-22 13:15:19,615 INFO L78 Accepts]: Start accepts. Automaton has 25926 states and 40816 transitions. Word has length 102 [2021-12-22 13:15:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:19,617 INFO L470 AbstractCegarLoop]: Abstraction has 25926 states and 40816 transitions. [2021-12-22 13:15:19,617 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) [2021-12-22 13:15:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 25926 states and 40816 transitions. [2021-12-22 13:15:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:15:19,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:19,637 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] [2021-12-22 13:15:19,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:15:19,637 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:19,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1048962725, now seen corresponding path program 1 times [2021-12-22 13:15:19,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:19,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781604809] [2021-12-22 13:15:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:19,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:19,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:19,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:15:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:19,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:15:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:19,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:15:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:19,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:15:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:15:19,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:19,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781604809] [2021-12-22 13:15:19,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781604809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:19,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:19,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:15:19,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280715810] [2021-12-22 13:15:19,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:19,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:15:19,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:15:19,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:19,720 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) [2021-12-22 13:15:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:24,752 INFO L93 Difference]: Finished difference Result 88196 states and 141970 transitions. [2021-12-22 13:15:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:15:24,752 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 [2021-12-22 13:15:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:25,093 INFO L225 Difference]: With dead ends: 88196 [2021-12-22 13:15:25,094 INFO L226 Difference]: Without dead ends: 64620 [2021-12-22 13:15:25,184 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 [2021-12-22 13:15:25,185 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 1054 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:25,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 1942 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:15:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64620 states. [2021-12-22 13:15:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64620 to 49288. [2021-12-22 13:15:27,954 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) [2021-12-22 13:15:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49288 states to 49288 states and 80714 transitions. [2021-12-22 13:15:28,334 INFO L78 Accepts]: Start accepts. Automaton has 49288 states and 80714 transitions. Word has length 102 [2021-12-22 13:15:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:15:28,335 INFO L470 AbstractCegarLoop]: Abstraction has 49288 states and 80714 transitions. [2021-12-22 13:15:28,335 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) [2021-12-22 13:15:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 49288 states and 80714 transitions. [2021-12-22 13:15:28,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-22 13:15:28,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:15:28,402 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] [2021-12-22 13:15:28,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:15:28,403 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:15:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:15:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1168667673, now seen corresponding path program 1 times [2021-12-22 13:15:28,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:15:28,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171185920] [2021-12-22 13:15:28,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:15:28,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:15:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:28,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:15:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:28,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 13:15:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:28,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 13:15:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:28,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 13:15:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:28,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 13:15:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:15:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:15:28,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:15:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171185920] [2021-12-22 13:15:28,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171185920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:15:28,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:15:28,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:15:28,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923694227] [2021-12-22 13:15:28,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:15:28,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:15:28,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:15:28,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:15:28,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:15:28,492 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) [2021-12-22 13:15:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:15:36,719 INFO L93 Difference]: Finished difference Result 168900 states and 281642 transitions. [2021-12-22 13:15:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:15:36,719 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 [2021-12-22 13:15:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:15:37,215 INFO L225 Difference]: With dead ends: 168900 [2021-12-22 13:15:37,215 INFO L226 Difference]: Without dead ends: 121962 [2021-12-22 13:15:37,364 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 [2021-12-22 13:15:37,364 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 999 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:15:37,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1950 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 13:15:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121962 states.