./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.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 a0f469ae37a514ddca8d0dce53a0af7478c9ef70fff43265912fb6cefbfb3984 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:43:36,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:43:36,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:43:36,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:43:36,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:43:36,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:43:36,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:43:36,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:43:36,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:43:36,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:43:36,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:43:36,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:43:36,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:43:36,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:43:36,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:43:36,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:43:36,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:43:36,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:43:36,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:43:36,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:43:36,356 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:43:36,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:43:36,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:43:36,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:43:36,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:43:36,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:43:36,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:43:36,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:43:36,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:43:36,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:43:36,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:43:36,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:43:36,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:43:36,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:43:36,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:43:36,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:43:36,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:43:36,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:43:36,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:43:36,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:43:36,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:43:36,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:43:36,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:43:36,402 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:43:36,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:43:36,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:43:36,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:43:36,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:43:36,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:43:36,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:43:36,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:43:36,411 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:43:36,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:43:36,412 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:43:36,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:43:36,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:43:36,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:43:36,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:43:36,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:43:36,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:43:36,413 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:43:36,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:43:36,413 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:43:36,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:43:36,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:43:36,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:43:36,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:43:36,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:43:36,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:43:36,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:43:36,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:43:36,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:43:36,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:43:36,415 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:43:36,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:43:36,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:43:36,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0f469ae37a514ddca8d0dce53a0af7478c9ef70fff43265912fb6cefbfb3984 [2022-07-22 20:43:36,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:43:36,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:43:36,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:43:36,638 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:43:36,638 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:43:36,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-07-22 20:43:36,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad99d3c5/1264dd9f71bb4679ac04c199af6b9b00/FLAG9b74ab805 [2022-07-22 20:43:37,054 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:43:37,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-07-22 20:43:37,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad99d3c5/1264dd9f71bb4679ac04c199af6b9b00/FLAG9b74ab805 [2022-07-22 20:43:37,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad99d3c5/1264dd9f71bb4679ac04c199af6b9b00 [2022-07-22 20:43:37,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:43:37,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:43:37,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:43:37,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:43:37,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:43:37,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6d9655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37, skipping insertion in model container [2022-07-22 20:43:37,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:43:37,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:43:37,612 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[913,926] [2022-07-22 20:43:37,636 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[5977,5990] [2022-07-22 20:43:37,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:43:37,666 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:43:37,674 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[913,926] [2022-07-22 20:43:37,684 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[5977,5990] [2022-07-22 20:43:37,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:43:37,738 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:43:37,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37 WrapperNode [2022-07-22 20:43:37,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:43:37,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:43:37,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:43:37,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:43:37,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,775 INFO L137 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 533 [2022-07-22 20:43:37,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:43:37,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:43:37,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:43:37,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:43:37,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:43:37,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:43:37,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:43:37,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:43:37,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (1/1) ... [2022-07-22 20:43:37,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:43:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:37,844 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) [2022-07-22 20:43:37,846 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 [2022-07-22 20:43:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:43:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-22 20:43:37,871 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-22 20:43:37,871 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-22 20:43:37,872 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-22 20:43:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-22 20:43:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-22 20:43:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-22 20:43:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-22 20:43:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-22 20:43:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-22 20:43:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-22 20:43:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-22 20:43:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-22 20:43:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-22 20:43:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:43:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-22 20:43:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-22 20:43:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:43:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:43:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-22 20:43:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-22 20:43:37,934 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:43:37,936 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:43:38,389 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:43:38,398 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:43:38,401 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-22 20:43:38,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:43:38 BoogieIcfgContainer [2022-07-22 20:43:38,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:43:38,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:43:38,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:43:38,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:43:38,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:43:37" (1/3) ... [2022-07-22 20:43:38,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1252036c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:43:38, skipping insertion in model container [2022-07-22 20:43:38,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:43:37" (2/3) ... [2022-07-22 20:43:38,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1252036c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:43:38, skipping insertion in model container [2022-07-22 20:43:38,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:43:38" (3/3) ... [2022-07-22 20:43:38,411 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-07-22 20:43:38,420 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:43:38,421 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:43:38,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:43:38,478 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5054411, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@112bd8e6 [2022-07-22 20:43:38,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:43:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 194 states have (on average 1.5824742268041236) internal successors, (307), 199 states have internal predecessors, (307), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 20:43:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 20:43:38,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:38,498 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:38,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1071236690, now seen corresponding path program 1 times [2022-07-22 20:43:38,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:38,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273277720] [2022-07-22 20:43:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:38,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:38,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:43:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:38,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 20:43:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:38,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:38,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273277720] [2022-07-22 20:43:38,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273277720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:38,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:38,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:43:38,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58772988] [2022-07-22 20:43:38,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:38,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:43:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:43:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:43:38,754 INFO L87 Difference]: Start difference. First operand has 229 states, 194 states have (on average 1.5824742268041236) internal successors, (307), 199 states have internal predecessors, (307), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:43:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:38,997 INFO L93 Difference]: Finished difference Result 512 states and 792 transitions. [2022-07-22 20:43:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:43:38,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-22 20:43:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:39,013 INFO L225 Difference]: With dead ends: 512 [2022-07-22 20:43:39,013 INFO L226 Difference]: Without dead ends: 289 [2022-07-22 20:43:39,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:43:39,020 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 404 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:39,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 589 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:43:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-22 20:43:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 283. [2022-07-22 20:43:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 243 states have (on average 1.448559670781893) internal successors, (352), 247 states have internal predecessors, (352), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2022-07-22 20:43:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 410 transitions. [2022-07-22 20:43:39,078 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 410 transitions. Word has length 44 [2022-07-22 20:43:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:39,079 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 410 transitions. [2022-07-22 20:43:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:43:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 410 transitions. [2022-07-22 20:43:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 20:43:39,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:39,083 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:39,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:43:39,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:39,084 INFO L85 PathProgramCache]: Analyzing trace with hash -617941460, now seen corresponding path program 1 times [2022-07-22 20:43:39,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:39,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977115620] [2022-07-22 20:43:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:43:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 20:43:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:39,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977115620] [2022-07-22 20:43:39,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977115620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:39,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:39,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:43:39,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976743758] [2022-07-22 20:43:39,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:39,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:43:39,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:39,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:43:39,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:43:39,139 INFO L87 Difference]: Start difference. First operand 283 states and 410 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:43:39,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:39,320 INFO L93 Difference]: Finished difference Result 531 states and 750 transitions. [2022-07-22 20:43:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:43:39,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-22 20:43:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:39,329 INFO L225 Difference]: With dead ends: 531 [2022-07-22 20:43:39,329 INFO L226 Difference]: Without dead ends: 407 [2022-07-22 20:43:39,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:43:39,333 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 188 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:39,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 728 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 20:43:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-22 20:43:39,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 350. [2022-07-22 20:43:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 304 states have (on average 1.4342105263157894) internal successors, (436), 308 states have internal predecessors, (436), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2022-07-22 20:43:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 500 transitions. [2022-07-22 20:43:39,362 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 500 transitions. Word has length 45 [2022-07-22 20:43:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:39,362 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 500 transitions. [2022-07-22 20:43:39,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:43:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 500 transitions. [2022-07-22 20:43:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 20:43:39,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:39,364 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:39,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:43:39,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1902298921, now seen corresponding path program 1 times [2022-07-22 20:43:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:39,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421669230] [2022-07-22 20:43:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:43:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 20:43:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:39,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:39,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421669230] [2022-07-22 20:43:39,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421669230] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:39,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:39,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:43:39,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468839084] [2022-07-22 20:43:39,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:39,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:43:39,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:43:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:43:39,454 INFO L87 Difference]: Start difference. First operand 350 states and 500 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:43:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:39,557 INFO L93 Difference]: Finished difference Result 758 states and 1059 transitions. [2022-07-22 20:43:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:43:39,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-22 20:43:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:39,560 INFO L225 Difference]: With dead ends: 758 [2022-07-22 20:43:39,560 INFO L226 Difference]: Without dead ends: 567 [2022-07-22 20:43:39,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:43:39,562 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 413 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:39,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 582 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:43:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-07-22 20:43:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 515. [2022-07-22 20:43:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 450 states have (on average 1.3911111111111112) internal successors, (626), 457 states have internal predecessors, (626), 41 states have call successors, (41), 21 states have call predecessors, (41), 22 states have return successors, (51), 37 states have call predecessors, (51), 39 states have call successors, (51) [2022-07-22 20:43:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 718 transitions. [2022-07-22 20:43:39,583 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 718 transitions. Word has length 45 [2022-07-22 20:43:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:39,585 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 718 transitions. [2022-07-22 20:43:39,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:43:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 718 transitions. [2022-07-22 20:43:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 20:43:39,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:39,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:43:39,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:43:39,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1972716290, now seen corresponding path program 1 times [2022-07-22 20:43:39,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:39,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508953269] [2022-07-22 20:43:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:39,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:43:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 20:43:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 20:43:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 20:43:39,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:39,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508953269] [2022-07-22 20:43:39,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508953269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:39,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:39,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:43:39,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224276669] [2022-07-22 20:43:39,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:39,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:43:39,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:43:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:43:39,654 INFO L87 Difference]: Start difference. First operand 515 states and 718 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 20:43:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:39,847 INFO L93 Difference]: Finished difference Result 1099 states and 1503 transitions. [2022-07-22 20:43:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:43:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-07-22 20:43:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:39,852 INFO L225 Difference]: With dead ends: 1099 [2022-07-22 20:43:39,852 INFO L226 Difference]: Without dead ends: 743 [2022-07-22 20:43:39,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:43:39,864 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 172 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:39,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 783 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 20:43:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-07-22 20:43:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 705. [2022-07-22 20:43:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 616 states have (on average 1.3409090909090908) internal successors, (826), 625 states have internal predecessors, (826), 55 states have call successors, (55), 29 states have call predecessors, (55), 32 states have return successors, (75), 51 states have call predecessors, (75), 53 states have call successors, (75) [2022-07-22 20:43:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 956 transitions. [2022-07-22 20:43:39,895 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 956 transitions. Word has length 62 [2022-07-22 20:43:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:39,897 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 956 transitions. [2022-07-22 20:43:39,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 20:43:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 956 transitions. [2022-07-22 20:43:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 20:43:39,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:39,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:43:39,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:43:39,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash -785609067, now seen corresponding path program 1 times [2022-07-22 20:43:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:39,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264599049] [2022-07-22 20:43:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:43:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 20:43:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 20:43:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 20:43:39,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:39,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264599049] [2022-07-22 20:43:39,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264599049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:39,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:39,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:43:39,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326798891] [2022-07-22 20:43:39,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:39,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:43:39,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:43:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:43:39,995 INFO L87 Difference]: Start difference. First operand 705 states and 956 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 20:43:40,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:40,110 INFO L93 Difference]: Finished difference Result 1358 states and 1809 transitions. [2022-07-22 20:43:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:43:40,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-07-22 20:43:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:40,114 INFO L225 Difference]: With dead ends: 1358 [2022-07-22 20:43:40,114 INFO L226 Difference]: Without dead ends: 904 [2022-07-22 20:43:40,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:43:40,115 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 400 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:40,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 579 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:43:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-07-22 20:43:40,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 849. [2022-07-22 20:43:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 744 states have (on average 1.3131720430107527) internal successors, (977), 755 states have internal predecessors, (977), 63 states have call successors, (63), 35 states have call predecessors, (63), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-07-22 20:43:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1129 transitions. [2022-07-22 20:43:40,157 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1129 transitions. Word has length 67 [2022-07-22 20:43:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:40,158 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1129 transitions. [2022-07-22 20:43:40,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 20:43:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1129 transitions. [2022-07-22 20:43:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 20:43:40,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:40,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:43:40,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:43:40,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1619896469, now seen corresponding path program 1 times [2022-07-22 20:43:40,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:40,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349166390] [2022-07-22 20:43:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:40,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:43:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:40,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:40,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:43:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:43:40,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:40,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349166390] [2022-07-22 20:43:40,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349166390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:40,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007956183] [2022-07-22 20:43:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:40,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:40,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:40,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:43:40,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:43:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 20:43:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:43:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:40,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:43:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 20:43:40,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007956183] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:40,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:43:40,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-22 20:43:40,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306050143] [2022-07-22 20:43:40,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:40,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:43:40,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:40,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:43:40,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:40,536 INFO L87 Difference]: Start difference. First operand 849 states and 1129 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 20:43:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:40,623 INFO L93 Difference]: Finished difference Result 905 states and 1197 transitions. [2022-07-22 20:43:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 20:43:40,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-07-22 20:43:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:40,627 INFO L225 Difference]: With dead ends: 905 [2022-07-22 20:43:40,627 INFO L226 Difference]: Without dead ends: 902 [2022-07-22 20:43:40,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:43:40,629 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 557 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:40,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 411 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:43:40,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-07-22 20:43:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 848. [2022-07-22 20:43:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 744 states have (on average 1.310483870967742) internal successors, (975), 754 states have internal predecessors, (975), 62 states have call successors, (62), 35 states have call predecessors, (62), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-07-22 20:43:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1126 transitions. [2022-07-22 20:43:40,667 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1126 transitions. Word has length 68 [2022-07-22 20:43:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:40,668 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1126 transitions. [2022-07-22 20:43:40,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 20:43:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1126 transitions. [2022-07-22 20:43:40,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 20:43:40,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:40,671 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:43:40,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 20:43:40,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 20:43:40,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1323549800, now seen corresponding path program 1 times [2022-07-22 20:43:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:40,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819372254] [2022-07-22 20:43:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:40,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:40,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:43:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:40,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:40,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 20:43:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:43:40,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819372254] [2022-07-22 20:43:40,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819372254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082622213] [2022-07-22 20:43:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:40,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:40,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:40,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:43:40,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 20:43:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:41,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 20:43:41,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:43:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:41,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:43:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 20:43:41,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082622213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:43:41,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:43:41,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-22 20:43:41,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264569063] [2022-07-22 20:43:41,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:43:41,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 20:43:41,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:41,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 20:43:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:43:41,357 INFO L87 Difference]: Start difference. First operand 848 states and 1126 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 20:43:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:42,339 INFO L93 Difference]: Finished difference Result 2548 states and 3346 transitions. [2022-07-22 20:43:42,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 20:43:42,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-07-22 20:43:42,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:42,345 INFO L225 Difference]: With dead ends: 2548 [2022-07-22 20:43:42,345 INFO L226 Difference]: Without dead ends: 2004 [2022-07-22 20:43:42,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 20:43:42,347 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 972 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:42,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 2537 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 20:43:42,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2022-07-22 20:43:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1237. [2022-07-22 20:43:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1094 states have (on average 1.2879341864716636) internal successors, (1409), 1112 states have internal predecessors, (1409), 82 states have call successors, (82), 49 states have call predecessors, (82), 59 states have return successors, (123), 76 states have call predecessors, (123), 81 states have call successors, (123) [2022-07-22 20:43:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1614 transitions. [2022-07-22 20:43:42,400 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1614 transitions. Word has length 69 [2022-07-22 20:43:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:42,400 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 1614 transitions. [2022-07-22 20:43:42,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 20:43:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1614 transitions. [2022-07-22 20:43:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:43:42,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:42,403 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:42,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 20:43:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-22 20:43:42,615 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -931355791, now seen corresponding path program 1 times [2022-07-22 20:43:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:42,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620766630] [2022-07-22 20:43:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:42,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:42,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:42,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:42,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:42,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:42,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:42,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620766630] [2022-07-22 20:43:42,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620766630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:42,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:42,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:43:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210467071] [2022-07-22 20:43:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:42,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:43:42,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:43:42,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:43:42,692 INFO L87 Difference]: Start difference. First operand 1237 states and 1614 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:43,321 INFO L93 Difference]: Finished difference Result 1605 states and 2181 transitions. [2022-07-22 20:43:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:43:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-22 20:43:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:43,326 INFO L225 Difference]: With dead ends: 1605 [2022-07-22 20:43:43,326 INFO L226 Difference]: Without dead ends: 1464 [2022-07-22 20:43:43,327 INFO L412 NwaCegarLoop]: 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 [2022-07-22 20:43:43,327 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 663 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:43,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 884 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 20:43:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-07-22 20:43:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1379. [2022-07-22 20:43:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1217 states have (on average 1.3114215283483976) internal successors, (1596), 1236 states have internal predecessors, (1596), 94 states have call successors, (94), 55 states have call predecessors, (94), 66 states have return successors, (138), 88 states have call predecessors, (138), 93 states have call successors, (138) [2022-07-22 20:43:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1828 transitions. [2022-07-22 20:43:43,382 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1828 transitions. Word has length 79 [2022-07-22 20:43:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:43,382 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 1828 transitions. [2022-07-22 20:43:43,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1828 transitions. [2022-07-22 20:43:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:43:43,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:43,384 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:43,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 20:43:43,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:43,385 INFO L85 PathProgramCache]: Analyzing trace with hash -694307595, now seen corresponding path program 1 times [2022-07-22 20:43:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:43,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644502057] [2022-07-22 20:43:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:43,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:43,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:43,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:43,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:43,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:43,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:43,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644502057] [2022-07-22 20:43:43,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644502057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:43,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:43,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:43:43,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905290376] [2022-07-22 20:43:43,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:43,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:43:43,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:43,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:43:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:43,434 INFO L87 Difference]: Start difference. First operand 1379 states and 1828 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:44,301 INFO L93 Difference]: Finished difference Result 1933 states and 2674 transitions. [2022-07-22 20:43:44,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 20:43:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-22 20:43:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:44,307 INFO L225 Difference]: With dead ends: 1933 [2022-07-22 20:43:44,307 INFO L226 Difference]: Without dead ends: 1650 [2022-07-22 20:43:44,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:43:44,309 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 661 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:44,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1382 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:43:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-07-22 20:43:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1512. [2022-07-22 20:43:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1331 states have (on average 1.3260706235912847) internal successors, (1765), 1351 states have internal predecessors, (1765), 106 states have call successors, (106), 61 states have call predecessors, (106), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-07-22 20:43:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2023 transitions. [2022-07-22 20:43:44,367 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2023 transitions. Word has length 79 [2022-07-22 20:43:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:44,367 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2023 transitions. [2022-07-22 20:43:44,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2023 transitions. [2022-07-22 20:43:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:43:44,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:44,370 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:44,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 20:43:44,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:44,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:44,370 INFO L85 PathProgramCache]: Analyzing trace with hash -748700493, now seen corresponding path program 1 times [2022-07-22 20:43:44,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:44,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802032633] [2022-07-22 20:43:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:44,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:44,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:44,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:44,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:44,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:44,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:44,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802032633] [2022-07-22 20:43:44,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802032633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:44,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:44,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:43:44,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106888121] [2022-07-22 20:43:44,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:44,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:43:44,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:43:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:44,430 INFO L87 Difference]: Start difference. First operand 1512 states and 2023 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:44,901 INFO L93 Difference]: Finished difference Result 2066 states and 2875 transitions. [2022-07-22 20:43:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:43:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-22 20:43:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:44,908 INFO L225 Difference]: With dead ends: 2066 [2022-07-22 20:43:44,908 INFO L226 Difference]: Without dead ends: 1650 [2022-07-22 20:43:44,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:43:44,910 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 544 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:44,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 860 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 20:43:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-07-22 20:43:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1512. [2022-07-22 20:43:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1331 states have (on average 1.32381667918858) internal successors, (1762), 1351 states have internal predecessors, (1762), 106 states have call successors, (106), 61 states have call predecessors, (106), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-07-22 20:43:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2020 transitions. [2022-07-22 20:43:44,972 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2020 transitions. Word has length 79 [2022-07-22 20:43:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:44,972 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2020 transitions. [2022-07-22 20:43:44,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2020 transitions. [2022-07-22 20:43:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:43:44,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:44,975 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:43:44,975 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:44,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash -69428239, now seen corresponding path program 1 times [2022-07-22 20:43:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:44,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52100116] [2022-07-22 20:43:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:44,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:45,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52100116] [2022-07-22 20:43:45,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52100116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:45,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:45,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:43:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014423033] [2022-07-22 20:43:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:43:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:43:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:45,038 INFO L87 Difference]: Start difference. First operand 1512 states and 2020 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:45,467 INFO L93 Difference]: Finished difference Result 2062 states and 2858 transitions. [2022-07-22 20:43:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:43:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-22 20:43:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:45,474 INFO L225 Difference]: With dead ends: 2062 [2022-07-22 20:43:45,474 INFO L226 Difference]: Without dead ends: 1646 [2022-07-22 20:43:45,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:43:45,476 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 609 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:45,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 733 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:43:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-07-22 20:43:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1512. [2022-07-22 20:43:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1331 states have (on average 1.3215627347858754) internal successors, (1759), 1351 states have internal predecessors, (1759), 106 states have call successors, (106), 61 states have call predecessors, (106), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-07-22 20:43:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2017 transitions. [2022-07-22 20:43:45,544 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2017 transitions. Word has length 79 [2022-07-22 20:43:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:45,545 INFO L495 AbstractCegarLoop]: Abstraction has 1512 states and 2017 transitions. [2022-07-22 20:43:45,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2017 transitions. [2022-07-22 20:43:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:43:45,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:45,547 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:45,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 20:43:45,547 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:45,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1892146419, now seen corresponding path program 1 times [2022-07-22 20:43:45,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:45,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575963510] [2022-07-22 20:43:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:45,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575963510] [2022-07-22 20:43:45,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575963510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:45,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:45,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:43:45,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178823418] [2022-07-22 20:43:45,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:45,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:43:45,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:45,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:43:45,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:45,621 INFO L87 Difference]: Start difference. First operand 1512 states and 2017 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:46,543 INFO L93 Difference]: Finished difference Result 2484 states and 3469 transitions. [2022-07-22 20:43:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:43:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-22 20:43:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:46,550 INFO L225 Difference]: With dead ends: 2484 [2022-07-22 20:43:46,550 INFO L226 Difference]: Without dead ends: 2068 [2022-07-22 20:43:46,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:43:46,551 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 663 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:46,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1388 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:43:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-07-22 20:43:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1772. [2022-07-22 20:43:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1555 states have (on average 1.342765273311897) internal successors, (2088), 1577 states have internal predecessors, (2088), 128 states have call successors, (128), 73 states have call predecessors, (128), 87 states have return successors, (182), 125 states have call predecessors, (182), 127 states have call successors, (182) [2022-07-22 20:43:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2398 transitions. [2022-07-22 20:43:46,648 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2398 transitions. Word has length 79 [2022-07-22 20:43:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:46,648 INFO L495 AbstractCegarLoop]: Abstraction has 1772 states and 2398 transitions. [2022-07-22 20:43:46,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2398 transitions. [2022-07-22 20:43:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:43:46,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:46,651 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:46,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 20:43:46,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:46,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2093970353, now seen corresponding path program 1 times [2022-07-22 20:43:46,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:46,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079898124] [2022-07-22 20:43:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:46,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:46,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:46,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:46,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:46,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:46,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:46,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079898124] [2022-07-22 20:43:46,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079898124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:46,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:46,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:43:46,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398601482] [2022-07-22 20:43:46,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:46,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:43:46,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:43:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:46,732 INFO L87 Difference]: Start difference. First operand 1772 states and 2398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:47,598 INFO L93 Difference]: Finished difference Result 3400 states and 4812 transitions. [2022-07-22 20:43:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:43:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-22 20:43:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:47,606 INFO L225 Difference]: With dead ends: 3400 [2022-07-22 20:43:47,606 INFO L226 Difference]: Without dead ends: 2724 [2022-07-22 20:43:47,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 20:43:47,608 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 697 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:47,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 1343 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:43:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-07-22 20:43:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2293. [2022-07-22 20:43:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2006 states have (on average 1.3708873379860418) internal successors, (2750), 2032 states have internal predecessors, (2750), 170 states have call successors, (170), 97 states have call predecessors, (170), 115 states have return successors, (246), 171 states have call predecessors, (246), 169 states have call successors, (246) [2022-07-22 20:43:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3166 transitions. [2022-07-22 20:43:47,696 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3166 transitions. Word has length 79 [2022-07-22 20:43:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:47,696 INFO L495 AbstractCegarLoop]: Abstraction has 2293 states and 3166 transitions. [2022-07-22 20:43:47,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3166 transitions. [2022-07-22 20:43:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:43:47,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:47,701 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:47,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:43:47,701 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1640297165, now seen corresponding path program 1 times [2022-07-22 20:43:47,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:47,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732561] [2022-07-22 20:43:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:47,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:47,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:47,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:47,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:47,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:47,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732561] [2022-07-22 20:43:47,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:47,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:47,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 20:43:47,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071245253] [2022-07-22 20:43:47,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:47,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 20:43:47,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 20:43:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:47,759 INFO L87 Difference]: Start difference. First operand 2293 states and 3166 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:48,189 INFO L93 Difference]: Finished difference Result 3794 states and 5413 transitions. [2022-07-22 20:43:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:43:48,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-22 20:43:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:48,197 INFO L225 Difference]: With dead ends: 3794 [2022-07-22 20:43:48,197 INFO L226 Difference]: Without dead ends: 2597 [2022-07-22 20:43:48,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:43:48,200 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 609 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:48,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 724 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:43:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2022-07-22 20:43:48,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2293. [2022-07-22 20:43:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2006 states have (on average 1.3664007976071784) internal successors, (2741), 2032 states have internal predecessors, (2741), 170 states have call successors, (170), 97 states have call predecessors, (170), 115 states have return successors, (246), 171 states have call predecessors, (246), 169 states have call successors, (246) [2022-07-22 20:43:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3157 transitions. [2022-07-22 20:43:48,286 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3157 transitions. Word has length 79 [2022-07-22 20:43:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:48,286 INFO L495 AbstractCegarLoop]: Abstraction has 2293 states and 3157 transitions. [2022-07-22 20:43:48,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3157 transitions. [2022-07-22 20:43:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:43:48,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:48,289 INFO L195 NwaCegarLoop]: 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] [2022-07-22 20:43:48,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:43:48,289 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1206568079, now seen corresponding path program 1 times [2022-07-22 20:43:48,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:48,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61770735] [2022-07-22 20:43:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:48,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:48,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:48,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:48,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:48,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:48,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:43:48,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:48,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61770735] [2022-07-22 20:43:48,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61770735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:48,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:43:48,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:43:48,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002467735] [2022-07-22 20:43:48,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:48,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:43:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:48,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:43:48,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:43:48,345 INFO L87 Difference]: Start difference. First operand 2293 states and 3157 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:49,161 INFO L93 Difference]: Finished difference Result 4604 states and 6587 transitions. [2022-07-22 20:43:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:43:49,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-22 20:43:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:49,172 INFO L225 Difference]: With dead ends: 4604 [2022-07-22 20:43:49,172 INFO L226 Difference]: Without dead ends: 3408 [2022-07-22 20:43:49,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 20:43:49,176 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 805 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:49,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 1128 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:43:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-07-22 20:43:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2949. [2022-07-22 20:43:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2569 states have (on average 1.38108213312573) internal successors, (3548), 2604 states have internal predecessors, (3548), 229 states have call successors, (229), 127 states have call predecessors, (229), 149 states have return successors, (315), 225 states have call predecessors, (315), 228 states have call successors, (315) [2022-07-22 20:43:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4092 transitions. [2022-07-22 20:43:49,322 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4092 transitions. Word has length 79 [2022-07-22 20:43:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:49,322 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 4092 transitions. [2022-07-22 20:43:49,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 20:43:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4092 transitions. [2022-07-22 20:43:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 20:43:49,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:49,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:43:49,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:43:49,326 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1418533864, now seen corresponding path program 1 times [2022-07-22 20:43:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:49,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572099296] [2022-07-22 20:43:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:49,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:43:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 20:43:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 20:43:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 20:43:49,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:49,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572099296] [2022-07-22 20:43:49,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572099296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:49,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886552983] [2022-07-22 20:43:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:49,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:49,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:49,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:43:49,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 20:43:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 20:43:49,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:43:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 20:43:49,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:43:49,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886552983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:49,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:43:49,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 20:43:49,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902969431] [2022-07-22 20:43:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:49,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:43:49,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:43:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:49,469 INFO L87 Difference]: Start difference. First operand 2949 states and 4092 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 20:43:49,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:49,558 INFO L93 Difference]: Finished difference Result 3672 states and 5030 transitions. [2022-07-22 20:43:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:43:49,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-07-22 20:43:49,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:49,567 INFO L225 Difference]: With dead ends: 3672 [2022-07-22 20:43:49,567 INFO L226 Difference]: Without dead ends: 2827 [2022-07-22 20:43:49,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:49,569 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 276 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:49,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 422 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:43:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2022-07-22 20:43:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2812. [2022-07-22 20:43:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2448 states have (on average 1.3848039215686274) internal successors, (3390), 2482 states have internal predecessors, (3390), 221 states have call successors, (221), 121 states have call predecessors, (221), 141 states have return successors, (301), 216 states have call predecessors, (301), 220 states have call successors, (301) [2022-07-22 20:43:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3912 transitions. [2022-07-22 20:43:49,715 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3912 transitions. Word has length 88 [2022-07-22 20:43:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:49,715 INFO L495 AbstractCegarLoop]: Abstraction has 2812 states and 3912 transitions. [2022-07-22 20:43:49,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 20:43:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3912 transitions. [2022-07-22 20:43:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 20:43:49,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:49,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:43:49,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 20:43:49,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:49,934 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:49,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash -483240636, now seen corresponding path program 1 times [2022-07-22 20:43:49,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:49,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793550648] [2022-07-22 20:43:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:49,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 20:43:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 20:43:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 20:43:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-22 20:43:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 20:43:49,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:49,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793550648] [2022-07-22 20:43:49,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793550648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:49,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368644807] [2022-07-22 20:43:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:49,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:49,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:49,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:43:49,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 20:43:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:43:50,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:43:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:43:50,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:43:50,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368644807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:50,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:43:50,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 20:43:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270160206] [2022-07-22 20:43:50,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:50,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:43:50,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:50,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:43:50,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:50,068 INFO L87 Difference]: Start difference. First operand 2812 states and 3912 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 20:43:50,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:50,149 INFO L93 Difference]: Finished difference Result 3191 states and 4380 transitions. [2022-07-22 20:43:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:43:50,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-07-22 20:43:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:50,161 INFO L225 Difference]: With dead ends: 3191 [2022-07-22 20:43:50,161 INFO L226 Difference]: Without dead ends: 1865 [2022-07-22 20:43:50,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:43:50,164 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 62 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:50,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 652 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:43:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-07-22 20:43:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1865. [2022-07-22 20:43:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1604 states have (on average 1.453865336658354) internal successors, (2332), 1622 states have internal predecessors, (2332), 164 states have call successors, (164), 84 states have call predecessors, (164), 96 states have return successors, (209), 166 states have call predecessors, (209), 164 states have call successors, (209) [2022-07-22 20:43:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2705 transitions. [2022-07-22 20:43:50,232 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2705 transitions. Word has length 103 [2022-07-22 20:43:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:50,232 INFO L495 AbstractCegarLoop]: Abstraction has 1865 states and 2705 transitions. [2022-07-22 20:43:50,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 20:43:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2705 transitions. [2022-07-22 20:43:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-22 20:43:50,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:50,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 20:43:50,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 20:43:50,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 20:43:50,451 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2138787050, now seen corresponding path program 1 times [2022-07-22 20:43:50,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208730249] [2022-07-22 20:43:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:50,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 20:43:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:43:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:43:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 20:43:50,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:50,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208730249] [2022-07-22 20:43:50,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208730249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:50,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567727006] [2022-07-22 20:43:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:50,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:50,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:50,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:43:50,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 20:43:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:43:50,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:43:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 20:43:50,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:43:50,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567727006] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:50,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:43:50,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-22 20:43:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301937113] [2022-07-22 20:43:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:50,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:43:50,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:43:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:50,650 INFO L87 Difference]: Start difference. First operand 1865 states and 2705 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:43:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:50,775 INFO L93 Difference]: Finished difference Result 5498 states and 8031 transitions. [2022-07-22 20:43:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:43:50,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2022-07-22 20:43:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:50,792 INFO L225 Difference]: With dead ends: 5498 [2022-07-22 20:43:50,792 INFO L226 Difference]: Without dead ends: 3646 [2022-07-22 20:43:50,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:50,797 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 176 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:50,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 427 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:43:50,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2022-07-22 20:43:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3616. [2022-07-22 20:43:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3113 states have (on average 1.4529392868615483) internal successors, (4523), 3148 states have internal predecessors, (4523), 310 states have call successors, (310), 168 states have call predecessors, (310), 192 states have return successors, (393), 307 states have call predecessors, (393), 310 states have call successors, (393) [2022-07-22 20:43:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 5226 transitions. [2022-07-22 20:43:50,966 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 5226 transitions. Word has length 128 [2022-07-22 20:43:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:50,966 INFO L495 AbstractCegarLoop]: Abstraction has 3616 states and 5226 transitions. [2022-07-22 20:43:50,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 20:43:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 5226 transitions. [2022-07-22 20:43:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-22 20:43:50,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:50,973 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 20:43:51,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 20:43:51,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 20:43:51,191 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:51,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1124784650, now seen corresponding path program 1 times [2022-07-22 20:43:51,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:51,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122487548] [2022-07-22 20:43:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 20:43:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:43:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 20:43:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 20:43:51,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:51,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122487548] [2022-07-22 20:43:51,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122487548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:51,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407242421] [2022-07-22 20:43:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:51,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:51,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:51,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:43:51,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 20:43:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:43:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:43:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 20:43:51,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:43:51,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407242421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:51,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:43:51,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 20:43:51,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487674398] [2022-07-22 20:43:51,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:51,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:43:51,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:51,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:43:51,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:51,343 INFO L87 Difference]: Start difference. First operand 3616 states and 5226 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 20:43:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:51,625 INFO L93 Difference]: Finished difference Result 10677 states and 15626 transitions. [2022-07-22 20:43:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:43:51,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2022-07-22 20:43:51,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:51,646 INFO L225 Difference]: With dead ends: 10677 [2022-07-22 20:43:51,646 INFO L226 Difference]: Without dead ends: 7075 [2022-07-22 20:43:51,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:51,654 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 191 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:51,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 639 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:43:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2022-07-22 20:43:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 7075. [2022-07-22 20:43:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7075 states, 6091 states have (on average 1.4457396158266294) internal successors, (8806), 6151 states have internal predecessors, (8806), 599 states have call successors, (599), 336 states have call predecessors, (599), 384 states have return successors, (884), 603 states have call predecessors, (884), 599 states have call successors, (884) [2022-07-22 20:43:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7075 states to 7075 states and 10289 transitions. [2022-07-22 20:43:51,967 INFO L78 Accepts]: Start accepts. Automaton has 7075 states and 10289 transitions. Word has length 128 [2022-07-22 20:43:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:51,967 INFO L495 AbstractCegarLoop]: Abstraction has 7075 states and 10289 transitions. [2022-07-22 20:43:51,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 20:43:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 7075 states and 10289 transitions. [2022-07-22 20:43:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-22 20:43:51,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:51,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:43:52,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 20:43:52,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:52,200 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1709611055, now seen corresponding path program 1 times [2022-07-22 20:43:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:52,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696510893] [2022-07-22 20:43:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:52,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 20:43:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:43:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-22 20:43:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:43:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-22 20:43:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 20:43:52,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696510893] [2022-07-22 20:43:52,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696510893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809316838] [2022-07-22 20:43:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:52,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:52,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:43:52,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 20:43:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:52,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:43:52,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:43:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 20:43:52,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:43:52,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809316838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:52,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:43:52,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-22 20:43:52,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508900746] [2022-07-22 20:43:52,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:52,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:43:52,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:43:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:52,476 INFO L87 Difference]: Start difference. First operand 7075 states and 10289 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-22 20:43:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:52,990 INFO L93 Difference]: Finished difference Result 20881 states and 30614 transitions. [2022-07-22 20:43:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:43:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2022-07-22 20:43:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:53,023 INFO L225 Difference]: With dead ends: 20881 [2022-07-22 20:43:53,023 INFO L226 Difference]: Without dead ends: 13825 [2022-07-22 20:43:53,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:53,038 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 124 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:53,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 427 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:43:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2022-07-22 20:43:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13711. [2022-07-22 20:43:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13711 states, 11823 states have (on average 1.444472638078322) internal successors, (17078), 11941 states have internal predecessors, (17078), 1127 states have call successors, (1127), 664 states have call predecessors, (1127), 760 states have return successors, (1648), 1121 states have call predecessors, (1648), 1127 states have call successors, (1648) [2022-07-22 20:43:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13711 states to 13711 states and 19853 transitions. [2022-07-22 20:43:53,690 INFO L78 Accepts]: Start accepts. Automaton has 13711 states and 19853 transitions. Word has length 166 [2022-07-22 20:43:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:53,691 INFO L495 AbstractCegarLoop]: Abstraction has 13711 states and 19853 transitions. [2022-07-22 20:43:53,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-22 20:43:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 13711 states and 19853 transitions. [2022-07-22 20:43:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-22 20:43:53,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:53,713 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:43:53,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 20:43:53,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:53,927 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1669305873, now seen corresponding path program 1 times [2022-07-22 20:43:53,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:53,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588278560] [2022-07-22 20:43:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:53,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:53,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:53,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:53,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:53,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:53,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:53,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 20:43:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:43:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:54,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-22 20:43:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:54,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:43:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:54,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-22 20:43:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 20:43:54,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588278560] [2022-07-22 20:43:54,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588278560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781751666] [2022-07-22 20:43:54,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:54,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:54,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:54,011 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:43:54,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 20:43:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:54,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:43:54,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:43:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 20:43:54,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:43:54,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781751666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:54,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:43:54,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-22 20:43:54,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988757110] [2022-07-22 20:43:54,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:54,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:43:54,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:43:54,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:54,216 INFO L87 Difference]: Start difference. First operand 13711 states and 19853 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-22 20:43:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:55,249 INFO L93 Difference]: Finished difference Result 40647 states and 59354 transitions. [2022-07-22 20:43:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:43:55,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2022-07-22 20:43:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:55,328 INFO L225 Difference]: With dead ends: 40647 [2022-07-22 20:43:55,328 INFO L226 Difference]: Without dead ends: 26955 [2022-07-22 20:43:55,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:55,361 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 126 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:55,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 436 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:43:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26955 states. [2022-07-22 20:43:56,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26955 to 26729. [2022-07-22 20:43:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26729 states, 23045 states have (on average 1.4411802994141896) internal successors, (33212), 23279 states have internal predecessors, (33212), 2173 states have call successors, (2173), 1318 states have call predecessors, (2173), 1510 states have return successors, (3160), 2147 states have call predecessors, (3160), 2173 states have call successors, (3160) [2022-07-22 20:43:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26729 states to 26729 states and 38545 transitions. [2022-07-22 20:43:56,730 INFO L78 Accepts]: Start accepts. Automaton has 26729 states and 38545 transitions. Word has length 166 [2022-07-22 20:43:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:43:56,730 INFO L495 AbstractCegarLoop]: Abstraction has 26729 states and 38545 transitions. [2022-07-22 20:43:56,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-22 20:43:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 26729 states and 38545 transitions. [2022-07-22 20:43:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-22 20:43:56,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:43:56,775 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:43:56,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 20:43:56,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-22 20:43:56,999 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:43:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:43:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1857787437, now seen corresponding path program 1 times [2022-07-22 20:43:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:43:57,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472599174] [2022-07-22 20:43:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:43:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:43:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:43:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:43:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:43:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:43:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-22 20:43:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:43:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:43:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-22 20:43:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:43:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-07-22 20:43:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-22 20:43:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:43:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472599174] [2022-07-22 20:43:57,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472599174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:43:57,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745557562] [2022-07-22 20:43:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:43:57,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:43:57,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:43:57,091 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:43:57,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 20:43:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:43:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:43:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:43:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:43:57,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:43:57,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745557562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:43:57,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:43:57,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 20:43:57,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843588494] [2022-07-22 20:43:57,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:43:57,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:43:57,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:43:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:43:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:57,281 INFO L87 Difference]: Start difference. First operand 26729 states and 38545 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-22 20:43:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:43:58,649 INFO L93 Difference]: Finished difference Result 56871 states and 82434 transitions. [2022-07-22 20:43:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:43:58,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2022-07-22 20:43:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:43:58,736 INFO L225 Difference]: With dead ends: 56871 [2022-07-22 20:43:58,736 INFO L226 Difference]: Without dead ends: 30163 [2022-07-22 20:43:58,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:43:58,779 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 149 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:43:58,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 263 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:43:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30163 states. [2022-07-22 20:44:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30163 to 30163. [2022-07-22 20:44:00,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30163 states, 26195 states have (on average 1.4027867913723993) internal successors, (36746), 26429 states have internal predecessors, (36746), 2259 states have call successors, (2259), 1516 states have call predecessors, (2259), 1708 states have return successors, (3282), 2233 states have call predecessors, (3282), 2259 states have call successors, (3282) [2022-07-22 20:44:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30163 states to 30163 states and 42287 transitions. [2022-07-22 20:44:00,499 INFO L78 Accepts]: Start accepts. Automaton has 30163 states and 42287 transitions. Word has length 184 [2022-07-22 20:44:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:00,499 INFO L495 AbstractCegarLoop]: Abstraction has 30163 states and 42287 transitions. [2022-07-22 20:44:00,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-22 20:44:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 30163 states and 42287 transitions. [2022-07-22 20:44:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-22 20:44:00,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:00,543 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:44:00,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 20:44:00,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:00,764 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:00,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1009724368, now seen corresponding path program 1 times [2022-07-22 20:44:00,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:00,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345750214] [2022-07-22 20:44:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:00,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:44:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:44:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:44:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:44:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:44:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-22 20:44:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-22 20:44:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:44:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-22 20:44:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:44:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-07-22 20:44:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 20:44:00,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345750214] [2022-07-22 20:44:00,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345750214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750060583] [2022-07-22 20:44:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:00,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:00,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:00,856 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:44:00,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 20:44:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:00,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 20:44:00,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:44:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 20:44:01,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:44:01,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750060583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:01,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:44:01,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 20:44:01,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2956609] [2022-07-22 20:44:01,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:01,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:44:01,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:01,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:44:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:44:01,023 INFO L87 Difference]: Start difference. First operand 30163 states and 42287 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 20:44:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:02,578 INFO L93 Difference]: Finished difference Result 53051 states and 74136 transitions. [2022-07-22 20:44:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:44:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 184 [2022-07-22 20:44:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:02,655 INFO L225 Difference]: With dead ends: 53051 [2022-07-22 20:44:02,656 INFO L226 Difference]: Without dead ends: 32319 [2022-07-22 20:44:02,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:44:02,691 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 161 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:02,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 447 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:44:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32319 states. [2022-07-22 20:44:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32319 to 32223. [2022-07-22 20:44:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32223 states, 28071 states have (on average 1.3772932920095473) internal successors, (38662), 28305 states have internal predecessors, (38662), 2311 states have call successors, (2311), 1648 states have call predecessors, (2311), 1840 states have return successors, (3466), 2285 states have call predecessors, (3466), 2311 states have call successors, (3466) [2022-07-22 20:44:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32223 states to 32223 states and 44439 transitions. [2022-07-22 20:44:04,331 INFO L78 Accepts]: Start accepts. Automaton has 32223 states and 44439 transitions. Word has length 184 [2022-07-22 20:44:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:04,332 INFO L495 AbstractCegarLoop]: Abstraction has 32223 states and 44439 transitions. [2022-07-22 20:44:04,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 20:44:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 32223 states and 44439 transitions. [2022-07-22 20:44:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-22 20:44:04,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:04,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:44:04,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 20:44:04,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-22 20:44:04,587 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:04,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1450159248, now seen corresponding path program 1 times [2022-07-22 20:44:04,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:04,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575623881] [2022-07-22 20:44:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:44:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:44:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:44:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:44:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:44:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 20:44:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:44:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 20:44:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-22 20:44:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:44:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-07-22 20:44:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 20:44:04,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:04,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575623881] [2022-07-22 20:44:04,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575623881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:04,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394659567] [2022-07-22 20:44:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:04,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:04,659 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:44:04,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 20:44:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:04,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:44:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:44:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 20:44:04,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:44:04,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394659567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:04,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:44:04,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 20:44:04,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879645653] [2022-07-22 20:44:04,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:04,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:44:04,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:44:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:44:04,801 INFO L87 Difference]: Start difference. First operand 32223 states and 44439 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 20:44:08,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:08,219 INFO L93 Difference]: Finished difference Result 95367 states and 132985 transitions. [2022-07-22 20:44:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:44:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 185 [2022-07-22 20:44:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:08,385 INFO L225 Difference]: With dead ends: 95367 [2022-07-22 20:44:08,385 INFO L226 Difference]: Without dead ends: 63165 [2022-07-22 20:44:08,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:44:08,441 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 189 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:08,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 636 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:44:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63165 states. [2022-07-22 20:44:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63165 to 63139. [2022-07-22 20:44:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63139 states, 54965 states have (on average 1.3690166469571545) internal successors, (75248), 55433 states have internal predecessors, (75248), 4525 states have call successors, (4525), 3264 states have call predecessors, (4525), 3648 states have return successors, (8126), 4473 states have call predecessors, (8126), 4525 states have call successors, (8126) [2022-07-22 20:44:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63139 states to 63139 states and 87899 transitions. [2022-07-22 20:44:12,129 INFO L78 Accepts]: Start accepts. Automaton has 63139 states and 87899 transitions. Word has length 185 [2022-07-22 20:44:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:12,129 INFO L495 AbstractCegarLoop]: Abstraction has 63139 states and 87899 transitions. [2022-07-22 20:44:12,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 20:44:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 63139 states and 87899 transitions. [2022-07-22 20:44:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-22 20:44:12,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:12,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:44:12,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 20:44:12,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 20:44:12,670 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:12,670 INFO L85 PathProgramCache]: Analyzing trace with hash 87421137, now seen corresponding path program 1 times [2022-07-22 20:44:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971820714] [2022-07-22 20:44:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:12,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:44:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:44:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:44:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:44:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:44:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 20:44:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:44:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 20:44:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-07-22 20:44:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:44:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-07-22 20:44:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-22 20:44:12,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:12,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971820714] [2022-07-22 20:44:12,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971820714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:12,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955397017] [2022-07-22 20:44:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:12,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:12,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:12,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:44:12,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 20:44:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:44:12,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:44:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 20:44:12,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:44:12,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955397017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:12,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:44:12,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 20:44:12,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291019951] [2022-07-22 20:44:12,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:12,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:44:12,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:44:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:44:12,858 INFO L87 Difference]: Start difference. First operand 63139 states and 87899 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 20:44:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:44:18,183 INFO L93 Difference]: Finished difference Result 179655 states and 254083 transitions. [2022-07-22 20:44:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:44:18,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 185 [2022-07-22 20:44:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:44:18,583 INFO L225 Difference]: With dead ends: 179655 [2022-07-22 20:44:18,583 INFO L226 Difference]: Without dead ends: 116549 [2022-07-22 20:44:18,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:44:18,708 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 177 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:44:18,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 633 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:44:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116549 states. [2022-07-22 20:44:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116549 to 116547. [2022-07-22 20:44:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116547 states, 101097 states have (on average 1.3641156513051822) internal successors, (137908), 102033 states have internal predecessors, (137908), 8601 states have call successors, (8601), 6080 states have call predecessors, (8601), 6848 states have return successors, (18420), 8497 states have call predecessors, (18420), 8601 states have call successors, (18420) [2022-07-22 20:44:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116547 states to 116547 states and 164929 transitions. [2022-07-22 20:44:25,612 INFO L78 Accepts]: Start accepts. Automaton has 116547 states and 164929 transitions. Word has length 185 [2022-07-22 20:44:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:44:25,613 INFO L495 AbstractCegarLoop]: Abstraction has 116547 states and 164929 transitions. [2022-07-22 20:44:25,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 20:44:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 116547 states and 164929 transitions. [2022-07-22 20:44:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-22 20:44:26,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:44:26,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:44:26,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 20:44:26,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-22 20:44:26,212 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:44:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:44:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1959075529, now seen corresponding path program 1 times [2022-07-22 20:44:26,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:44:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198092422] [2022-07-22 20:44:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:26,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:44:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 20:44:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 20:44:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 20:44:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 20:44:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 20:44:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 20:44:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:44:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 20:44:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 20:44:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-22 20:44:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-07-22 20:44:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-22 20:44:26,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:44:26,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198092422] [2022-07-22 20:44:26,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198092422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:44:26,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925199385] [2022-07-22 20:44:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:44:26,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:44:26,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:44:26,300 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:44:26,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 20:44:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:44:26,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:44:26,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:44:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-22 20:44:26,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:44:26,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925199385] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:44:26,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 20:44:26,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 20:44:26,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500905385] [2022-07-22 20:44:26,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:44:26,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:44:26,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:44:26,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:44:26,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:44:26,483 INFO L87 Difference]: Start difference. First operand 116547 states and 164929 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)