./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d55d399b7f413c968459e57be858565c9c3a03797404fd2613513b79af9aeb3 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:16:45,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:16:45,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:16:45,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:16:45,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:16:45,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:16:45,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:16:45,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:16:45,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:16:45,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:16:45,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:16:45,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:16:45,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:16:45,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:16:45,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:16:45,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:16:45,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:16:45,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:16:45,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:16:45,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:16:45,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:16:45,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:16:45,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:16:45,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:16:45,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:16:45,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:16:45,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:16:45,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:16:45,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:16:45,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:16:45,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:16:45,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:16:45,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:16:45,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:16:45,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:16:45,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:16:45,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:16:45,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:16:45,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:16:45,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:16:45,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:16:45,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:16:45,595 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:16:45,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:16:45,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:16:45,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:16:45,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:16:45,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:16:45,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:16:45,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:16:45,599 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:16:45,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:16:45,600 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:16:45,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:16:45,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:16:45,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:16:45,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:16:45,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:16:45,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:16:45,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:16:45,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:16:45,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:16:45,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:16:45,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:16:45,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:16:45,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:16:45,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:16:45,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:16:45,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:16:45,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:16:45,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:16:45,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:16:45,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:16:45,603 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:16:45,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:16:45,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:16:45,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d55d399b7f413c968459e57be858565c9c3a03797404fd2613513b79af9aeb3 [2021-12-14 16:16:45,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:16:45,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:16:45,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:16:45,926 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:16:45,927 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:16:45,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2021-12-14 16:16:45,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c2aa240/5e554168d5414aa393118762f0c3edcd/FLAG75c10172b [2021-12-14 16:16:46,366 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:16:46,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2021-12-14 16:16:46,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c2aa240/5e554168d5414aa393118762f0c3edcd/FLAG75c10172b [2021-12-14 16:16:46,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c2aa240/5e554168d5414aa393118762f0c3edcd [2021-12-14 16:16:46,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:16:46,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:16:46,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:16:46,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:16:46,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:16:46,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce0bd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:46, skipping insertion in model container [2021-12-14 16:16:46,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:16:46" (1/1) ... [2021-12-14 16:16:46,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:16:46,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:16:46,983 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.09.cil-1.c[913,926] [2021-12-14 16:16:47,015 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.09.cil-1.c[5977,5990] [2021-12-14 16:16:47,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:16:47,124 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:16:47,134 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.09.cil-1.c[913,926] [2021-12-14 16:16:47,145 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.09.cil-1.c[5977,5990] [2021-12-14 16:16:47,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:16:47,200 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:16:47,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47 WrapperNode [2021-12-14 16:16:47,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:16:47,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:16:47,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:16:47,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:16:47,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,262 INFO L137 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 881 [2021-12-14 16:16:47,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:16:47,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:16:47,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:16:47,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:16:47,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:16:47,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:16:47,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:16:47,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:16:47,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (1/1) ... [2021-12-14 16:16:47,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:16:47,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:47,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:16:47,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:16:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:16:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:16:47,369 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:16:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-14 16:16:47,371 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-14 16:16:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:16:47,371 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:16:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:16:47,371 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:16:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:16:47,371 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:16:47,372 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:16:47,372 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:16:47,372 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:16:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:16:47,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:16:47,373 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:16:47,373 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:16:47,515 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:16:47,517 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:16:48,010 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:16:48,019 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:16:48,019 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-12-14 16:16:48,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:16:48 BoogieIcfgContainer [2021-12-14 16:16:48,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:16:48,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:16:48,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:16:48,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:16:48,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:16:46" (1/3) ... [2021-12-14 16:16:48,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a8f1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:16:48, skipping insertion in model container [2021-12-14 16:16:48,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:16:47" (2/3) ... [2021-12-14 16:16:48,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a8f1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:16:48, skipping insertion in model container [2021-12-14 16:16:48,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:16:48" (3/3) ... [2021-12-14 16:16:48,069 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2021-12-14 16:16:48,072 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:16:48,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:16:48,151 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:16:48,156 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 16:16:48,156 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:16:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 379 states, 338 states have (on average 1.636094674556213) internal successors, (553), 343 states have internal predecessors, (553), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-14 16:16:48,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:16:48,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:48,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:48,182 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:48,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1554468982, now seen corresponding path program 1 times [2021-12-14 16:16:48,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:48,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055928233] [2021-12-14 16:16:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:48,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 16:16:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:48,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:48,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055928233] [2021-12-14 16:16:48,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055928233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:48,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:48,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:48,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856793197] [2021-12-14 16:16:48,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:48,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:48,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:48,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:48,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:48,397 INFO L87 Difference]: Start difference. First operand has 379 states, 338 states have (on average 1.636094674556213) internal successors, (553), 343 states have internal predecessors, (553), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:48,644 INFO L93 Difference]: Finished difference Result 806 states and 1296 transitions. [2021-12-14 16:16:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:48,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-14 16:16:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:48,663 INFO L225 Difference]: With dead ends: 806 [2021-12-14 16:16:48,665 INFO L226 Difference]: Without dead ends: 439 [2021-12-14 16:16:48,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:48,674 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 764 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:48,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 943 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:48,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-14 16:16:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 433. [2021-12-14 16:16:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 387 states have (on average 1.5142118863049097) internal successors, (586), 391 states have internal predecessors, (586), 33 states have call successors, (33), 11 states have call predecessors, (33), 11 states have return successors, (37), 31 states have call predecessors, (37), 31 states have call successors, (37) [2021-12-14 16:16:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 656 transitions. [2021-12-14 16:16:48,725 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 656 transitions. Word has length 44 [2021-12-14 16:16:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:48,726 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 656 transitions. [2021-12-14 16:16:48,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 656 transitions. [2021-12-14 16:16:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:16:48,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:48,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:48,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:16:48,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1185645894, now seen corresponding path program 1 times [2021-12-14 16:16:48,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:48,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435216803] [2021-12-14 16:16:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:48,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:16:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:48,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:48,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435216803] [2021-12-14 16:16:48,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435216803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:48,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:48,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:48,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363915957] [2021-12-14 16:16:48,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:48,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:48,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:48,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:48,795 INFO L87 Difference]: Start difference. First operand 433 states and 656 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:49,111 INFO L93 Difference]: Finished difference Result 681 states and 996 transitions. [2021-12-14 16:16:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:16:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:49,114 INFO L225 Difference]: With dead ends: 681 [2021-12-14 16:16:49,114 INFO L226 Difference]: Without dead ends: 557 [2021-12-14 16:16:49,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:49,116 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 308 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:49,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 1233 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:16:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-14 16:16:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 500. [2021-12-14 16:16:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 448 states have (on average 1.4955357142857142) internal successors, (670), 452 states have internal predecessors, (670), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-14 16:16:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 746 transitions. [2021-12-14 16:16:49,139 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 746 transitions. Word has length 45 [2021-12-14 16:16:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:49,140 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 746 transitions. [2021-12-14 16:16:49,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 746 transitions. [2021-12-14 16:16:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:16:49,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:49,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:49,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:16:49,142 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash -98711567, now seen corresponding path program 1 times [2021-12-14 16:16:49,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510653359] [2021-12-14 16:16:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:49,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 16:16:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:49,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510653359] [2021-12-14 16:16:49,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510653359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:49,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:49,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:49,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346328390] [2021-12-14 16:16:49,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:49,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:49,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:49,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:49,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:49,217 INFO L87 Difference]: Start difference. First operand 500 states and 746 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:49,345 INFO L93 Difference]: Finished difference Result 908 states and 1305 transitions. [2021-12-14 16:16:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-14 16:16:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:49,348 INFO L225 Difference]: With dead ends: 908 [2021-12-14 16:16:49,348 INFO L226 Difference]: Without dead ends: 717 [2021-12-14 16:16:49,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:49,350 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 773 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:49,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 944 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-12-14 16:16:49,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 665. [2021-12-14 16:16:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 594 states have (on average 1.4478114478114479) internal successors, (860), 601 states have internal predecessors, (860), 47 states have call successors, (47), 21 states have call predecessors, (47), 22 states have return successors, (57), 43 states have call predecessors, (57), 45 states have call successors, (57) [2021-12-14 16:16:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 964 transitions. [2021-12-14 16:16:49,375 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 964 transitions. Word has length 45 [2021-12-14 16:16:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:49,376 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 964 transitions. [2021-12-14 16:16:49,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 16:16:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 964 transitions. [2021-12-14 16:16:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 16:16:49,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:49,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:49,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:16:49,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1131261626, now seen corresponding path program 1 times [2021-12-14 16:16:49,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:49,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124771148] [2021-12-14 16:16:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:49,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 16:16:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:16:49,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:49,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124771148] [2021-12-14 16:16:49,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124771148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:49,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:49,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:49,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187710741] [2021-12-14 16:16:49,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:49,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:49,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:49,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:49,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:49,431 INFO L87 Difference]: Start difference. First operand 665 states and 964 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:49,765 INFO L93 Difference]: Finished difference Result 1249 states and 1749 transitions. [2021-12-14 16:16:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:49,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-14 16:16:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:49,769 INFO L225 Difference]: With dead ends: 1249 [2021-12-14 16:16:49,769 INFO L226 Difference]: Without dead ends: 893 [2021-12-14 16:16:49,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:49,771 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 292 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:49,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 1263 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:16:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-12-14 16:16:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 855. [2021-12-14 16:16:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 760 states have (on average 1.394736842105263) internal successors, (1060), 769 states have internal predecessors, (1060), 61 states have call successors, (61), 29 states have call predecessors, (61), 32 states have return successors, (81), 57 states have call predecessors, (81), 59 states have call successors, (81) [2021-12-14 16:16:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1202 transitions. [2021-12-14 16:16:49,798 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1202 transitions. Word has length 62 [2021-12-14 16:16:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:49,798 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1202 transitions. [2021-12-14 16:16:49,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1202 transitions. [2021-12-14 16:16:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:16:49,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:49,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:49,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:16:49,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1244909695, now seen corresponding path program 1 times [2021-12-14 16:16:49,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:49,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996647709] [2021-12-14 16:16:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:49,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 16:16:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-14 16:16:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 16:16:49,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:49,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996647709] [2021-12-14 16:16:49,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996647709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:49,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:49,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:16:49,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457944072] [2021-12-14 16:16:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:49,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:49,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:16:49,847 INFO L87 Difference]: Start difference. First operand 855 states and 1202 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:16:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:49,974 INFO L93 Difference]: Finished difference Result 1508 states and 2055 transitions. [2021-12-14 16:16:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:16:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-14 16:16:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:49,978 INFO L225 Difference]: With dead ends: 1508 [2021-12-14 16:16:49,978 INFO L226 Difference]: Without dead ends: 1054 [2021-12-14 16:16:49,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:49,980 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 760 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:49,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 941 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-12-14 16:16:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 999. [2021-12-14 16:16:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 888 states have (on average 1.3637387387387387) internal successors, (1211), 899 states have internal predecessors, (1211), 69 states have call successors, (69), 35 states have call predecessors, (69), 40 states have return successors, (95), 65 states have call predecessors, (95), 67 states have call successors, (95) [2021-12-14 16:16:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1375 transitions. [2021-12-14 16:16:50,011 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1375 transitions. Word has length 67 [2021-12-14 16:16:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:50,011 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 1375 transitions. [2021-12-14 16:16:50,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 16:16:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1375 transitions. [2021-12-14 16:16:50,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:16:50,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:50,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:50,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:16:50,013 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:50,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2059834607, now seen corresponding path program 1 times [2021-12-14 16:16:50,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:50,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087023225] [2021-12-14 16:16:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:50,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:16:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:16:50,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:50,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087023225] [2021-12-14 16:16:50,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087023225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:50,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660126914] [2021-12-14 16:16:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:50,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:50,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:50,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:50,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:16:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:16:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:50,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:50,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660126914] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:50,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-14 16:16:50,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-14 16:16:50,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395127171] [2021-12-14 16:16:50,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:50,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:16:50,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:16:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:50,546 INFO L87 Difference]: Start difference. First operand 999 states and 1375 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:50,656 INFO L93 Difference]: Finished difference Result 1055 states and 1443 transitions. [2021-12-14 16:16:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:16:50,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-14 16:16:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:50,662 INFO L225 Difference]: With dead ends: 1055 [2021-12-14 16:16:50,662 INFO L226 Difference]: Without dead ends: 1052 [2021-12-14 16:16:50,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:16:50,668 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 1025 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:50,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 657 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:16:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-12-14 16:16:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 998. [2021-12-14 16:16:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 888 states have (on average 1.3614864864864864) internal successors, (1209), 898 states have internal predecessors, (1209), 68 states have call successors, (68), 35 states have call predecessors, (68), 40 states have return successors, (95), 65 states have call predecessors, (95), 67 states have call successors, (95) [2021-12-14 16:16:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1372 transitions. [2021-12-14 16:16:50,710 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1372 transitions. Word has length 68 [2021-12-14 16:16:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:50,712 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 1372 transitions. [2021-12-14 16:16:50,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 16:16:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1372 transitions. [2021-12-14 16:16:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:16:50,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:50,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:50,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:50,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-14 16:16:50,934 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash -570809660, now seen corresponding path program 1 times [2021-12-14 16:16:50,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:50,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526300514] [2021-12-14 16:16:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:50,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:50,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:51,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 16:16:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:16:51,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:51,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526300514] [2021-12-14 16:16:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526300514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:51,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036031329] [2021-12-14 16:16:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:51,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:51,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:51,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:16:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:51,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:16:51,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:51,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:16:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:51,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036031329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:16:51,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:16:51,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-14 16:16:51,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775225255] [2021-12-14 16:16:51,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:16:51,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 16:16:51,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 16:16:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:51,558 INFO L87 Difference]: Start difference. First operand 998 states and 1372 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:52,823 INFO L93 Difference]: Finished difference Result 2698 states and 3592 transitions. [2021-12-14 16:16:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:16:52,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-14 16:16:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:52,832 INFO L225 Difference]: With dead ends: 2698 [2021-12-14 16:16:52,832 INFO L226 Difference]: Without dead ends: 2154 [2021-12-14 16:16:52,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 16:16:52,835 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 1566 mSDsluCounter, 3015 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 3710 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:52,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 3710 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:16:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-12-14 16:16:52,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1387. [2021-12-14 16:16:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1238 states have (on average 1.327140549273021) internal successors, (1643), 1256 states have internal predecessors, (1643), 88 states have call successors, (88), 49 states have call predecessors, (88), 59 states have return successors, (129), 82 states have call predecessors, (129), 87 states have call successors, (129) [2021-12-14 16:16:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1860 transitions. [2021-12-14 16:16:52,932 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1860 transitions. Word has length 69 [2021-12-14 16:16:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:52,933 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 1860 transitions. [2021-12-14 16:16:52,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-14 16:16:52,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1860 transitions. [2021-12-14 16:16:52,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-14 16:16:52,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:52,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:52,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:53,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-14 16:16:53,160 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:53,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1763884292, now seen corresponding path program 1 times [2021-12-14 16:16:53,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:53,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959170641] [2021-12-14 16:16:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:53,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 16:16:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 16:16:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 16:16:53,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:53,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959170641] [2021-12-14 16:16:53,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959170641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:53,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799080750] [2021-12-14 16:16:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:53,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:53,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:53,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:53,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:16:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 16:16:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 16:16:53,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:53,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799080750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:53,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:53,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:53,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924297302] [2021-12-14 16:16:53,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:53,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:53,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:53,712 INFO L87 Difference]: Start difference. First operand 1387 states and 1860 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:53,776 INFO L93 Difference]: Finished difference Result 2110 states and 2798 transitions. [2021-12-14 16:16:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:53,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-14 16:16:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:53,781 INFO L225 Difference]: With dead ends: 2110 [2021-12-14 16:16:53,795 INFO L226 Difference]: Without dead ends: 1265 [2021-12-14 16:16:53,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:53,797 INFO L933 BasicCegarLoop]: 596 mSDtfsCounter, 525 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:53,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 671 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-12-14 16:16:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1250. [2021-12-14 16:16:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1117 states have (on average 1.3294538943598926) internal successors, (1485), 1134 states have internal predecessors, (1485), 80 states have call successors, (80), 43 states have call predecessors, (80), 51 states have return successors, (115), 73 states have call predecessors, (115), 79 states have call successors, (115) [2021-12-14 16:16:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1680 transitions. [2021-12-14 16:16:53,861 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1680 transitions. Word has length 88 [2021-12-14 16:16:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:53,862 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1680 transitions. [2021-12-14 16:16:53,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-14 16:16:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1680 transitions. [2021-12-14 16:16:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 16:16:53,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:53,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:53,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:54,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:54,084 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:54,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:54,084 INFO L85 PathProgramCache]: Analyzing trace with hash -555075298, now seen corresponding path program 1 times [2021-12-14 16:16:54,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:54,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923020873] [2021-12-14 16:16:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:54,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:16:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-14 16:16:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 16:16:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 16:16:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 16:16:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 16:16:54,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923020873] [2021-12-14 16:16:54,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923020873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:16:54,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188564444] [2021-12-14 16:16:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:54,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:54,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:16:54,179 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:16:54,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:16:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 16:16:54,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:16:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:16:54,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:16:54,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188564444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:54,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:16:54,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-14 16:16:54,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094777566] [2021-12-14 16:16:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:54,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:16:54,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:16:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:54,461 INFO L87 Difference]: Start difference. First operand 1250 states and 1680 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:54,517 INFO L93 Difference]: Finished difference Result 1629 states and 2148 transitions. [2021-12-14 16:16:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:16:54,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-14 16:16:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:54,519 INFO L225 Difference]: With dead ends: 1629 [2021-12-14 16:16:54,519 INFO L226 Difference]: Without dead ends: 303 [2021-12-14 16:16:54,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:54,522 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 62 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:54,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1150 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:16:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-14 16:16:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-12-14 16:16:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 273 states have (on average 1.564102564102564) internal successors, (427), 274 states have internal predecessors, (427), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-14 16:16:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 473 transitions. [2021-12-14 16:16:54,531 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 473 transitions. Word has length 103 [2021-12-14 16:16:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:54,532 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 473 transitions. [2021-12-14 16:16:54,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 16:16:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 473 transitions. [2021-12-14 16:16:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:16:54,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:54,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:54,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:16:54,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:16:54,775 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:54,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:54,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1331621070, now seen corresponding path program 1 times [2021-12-14 16:16:54,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:54,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89887499] [2021-12-14 16:16:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:54,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:54,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:16:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:16:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:16:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:16:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:55,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:55,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89887499] [2021-12-14 16:16:55,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89887499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:55,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:55,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:16:55,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141369762] [2021-12-14 16:16:55,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:55,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:16:55,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:16:55,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:16:55,177 INFO L87 Difference]: Start difference. First operand 303 states and 473 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:55,916 INFO L93 Difference]: Finished difference Result 704 states and 1117 transitions. [2021-12-14 16:16:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:16:55,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-14 16:16:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:55,919 INFO L225 Difference]: With dead ends: 704 [2021-12-14 16:16:55,919 INFO L226 Difference]: Without dead ends: 412 [2021-12-14 16:16:55,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:16:55,920 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 801 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:55,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 850 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:16:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-12-14 16:16:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 303. [2021-12-14 16:16:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 273 states have (on average 1.5604395604395604) internal successors, (426), 274 states have internal predecessors, (426), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-14 16:16:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 472 transitions. [2021-12-14 16:16:55,938 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 472 transitions. Word has length 145 [2021-12-14 16:16:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:55,938 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 472 transitions. [2021-12-14 16:16:55,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:16:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 472 transitions. [2021-12-14 16:16:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:16:55,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:55,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:55,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:16:55,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:55,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1695087568, now seen corresponding path program 1 times [2021-12-14 16:16:55,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:55,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999625244] [2021-12-14 16:16:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:55,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:55,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:16:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:56,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:16:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:56,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:16:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:56,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:16:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:56,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:56,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999625244] [2021-12-14 16:16:56,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999625244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:56,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:56,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:16:56,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062814231] [2021-12-14 16:16:56,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:56,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:16:56,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:16:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:16:56,041 INFO L87 Difference]: Start difference. First operand 303 states and 472 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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) [2021-12-14 16:16:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:57,553 INFO L93 Difference]: Finished difference Result 1103 states and 1759 transitions. [2021-12-14 16:16:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:16:57,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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 145 [2021-12-14 16:16:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:57,557 INFO L225 Difference]: With dead ends: 1103 [2021-12-14 16:16:57,557 INFO L226 Difference]: Without dead ends: 818 [2021-12-14 16:16:57,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:16:57,558 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 1208 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:57,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 1370 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-14 16:16:57,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-12-14 16:16:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 601. [2021-12-14 16:16:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 546 states have (on average 1.5732600732600732) internal successors, (859), 548 states have internal predecessors, (859), 41 states have call successors, (41), 12 states have call predecessors, (41), 13 states have return successors, (44), 41 states have call predecessors, (44), 41 states have call successors, (44) [2021-12-14 16:16:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 944 transitions. [2021-12-14 16:16:57,581 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 944 transitions. Word has length 145 [2021-12-14 16:16:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:57,582 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 944 transitions. [2021-12-14 16:16:57,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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) [2021-12-14 16:16:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 944 transitions. [2021-12-14 16:16:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:16:57,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:57,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:57,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:16:57,583 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash 47915956, now seen corresponding path program 1 times [2021-12-14 16:16:57,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:57,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121963258] [2021-12-14 16:16:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:57,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:57,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:57,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:16:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:16:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:57,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:16:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:57,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:16:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:57,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:57,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121963258] [2021-12-14 16:16:57,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121963258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:57,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:57,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:57,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251099520] [2021-12-14 16:16:57,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:57,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:57,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:57,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:57,687 INFO L87 Difference]: Start difference. First operand 601 states and 944 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:16:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:16:59,700 INFO L93 Difference]: Finished difference Result 1821 states and 2906 transitions. [2021-12-14 16:16:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:16:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:16:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:16:59,705 INFO L225 Difference]: With dead ends: 1821 [2021-12-14 16:16:59,705 INFO L226 Difference]: Without dead ends: 1238 [2021-12-14 16:16:59,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:16:59,707 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 1230 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:16:59,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 2342 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 16:16:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-12-14 16:16:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 878. [2021-12-14 16:16:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 798 states have (on average 1.5664160401002507) internal successors, (1250), 801 states have internal predecessors, (1250), 59 states have call successors, (59), 18 states have call predecessors, (59), 20 states have return successors, (64), 60 states have call predecessors, (64), 59 states have call successors, (64) [2021-12-14 16:16:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1373 transitions. [2021-12-14 16:16:59,750 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1373 transitions. Word has length 145 [2021-12-14 16:16:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:16:59,750 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1373 transitions. [2021-12-14 16:16:59,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:16:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1373 transitions. [2021-12-14 16:16:59,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:16:59,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:16:59,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:16:59,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:16:59,752 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:16:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:16:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash 994953842, now seen corresponding path program 1 times [2021-12-14 16:16:59,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:16:59,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577024056] [2021-12-14 16:16:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:16:59,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:16:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:59,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:16:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:59,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:16:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:59,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:16:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:59,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:16:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:59,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:16:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:16:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:16:59,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:16:59,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577024056] [2021-12-14 16:16:59,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577024056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:16:59,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:16:59,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:16:59,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962508323] [2021-12-14 16:16:59,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:16:59,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:16:59,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:16:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:16:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:16:59,852 INFO L87 Difference]: Start difference. First operand 878 states and 1373 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:01,938 INFO L93 Difference]: Finished difference Result 2878 states and 4583 transitions. [2021-12-14 16:17:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:17:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:01,945 INFO L225 Difference]: With dead ends: 2878 [2021-12-14 16:17:01,945 INFO L226 Difference]: Without dead ends: 2018 [2021-12-14 16:17:01,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:01,947 INFO L933 BasicCegarLoop]: 780 mSDtfsCounter, 1224 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 2457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:01,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 2326 Invalid, 2457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 16:17:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-12-14 16:17:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1436. [2021-12-14 16:17:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1306 states have (on average 1.5612557427258806) internal successors, (2039), 1311 states have internal predecessors, (2039), 95 states have call successors, (95), 30 states have call predecessors, (95), 34 states have return successors, (108), 98 states have call predecessors, (108), 95 states have call successors, (108) [2021-12-14 16:17:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2242 transitions. [2021-12-14 16:17:02,006 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2242 transitions. Word has length 145 [2021-12-14 16:17:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:02,006 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 2242 transitions. [2021-12-14 16:17:02,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2242 transitions. [2021-12-14 16:17:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:17:02,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:02,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:02,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:17:02,008 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1055455056, now seen corresponding path program 1 times [2021-12-14 16:17:02,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:02,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122922844] [2021-12-14 16:17:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:02,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:17:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:17:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:17:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:17:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:02,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:02,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122922844] [2021-12-14 16:17:02,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122922844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:02,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:02,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:02,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538910024] [2021-12-14 16:17:02,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:02,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:02,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:02,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:02,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:02,110 INFO L87 Difference]: Start difference. First operand 1436 states and 2242 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:04,059 INFO L93 Difference]: Finished difference Result 4918 states and 7800 transitions. [2021-12-14 16:17:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:17:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:04,073 INFO L225 Difference]: With dead ends: 4918 [2021-12-14 16:17:04,073 INFO L226 Difference]: Without dead ends: 3500 [2021-12-14 16:17:04,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:04,076 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1223 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 2373 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:04,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1239 Valid, 2321 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2373 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 16:17:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-12-14 16:17:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2553. [2021-12-14 16:17:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2323 states have (on average 1.557038312526905) internal successors, (3617), 2332 states have internal predecessors, (3617), 167 states have call successors, (167), 54 states have call predecessors, (167), 62 states have return successors, (202), 174 states have call predecessors, (202), 167 states have call successors, (202) [2021-12-14 16:17:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 3986 transitions. [2021-12-14 16:17:04,191 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 3986 transitions. Word has length 145 [2021-12-14 16:17:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:04,192 INFO L470 AbstractCegarLoop]: Abstraction has 2553 states and 3986 transitions. [2021-12-14 16:17:04,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 3986 transitions. [2021-12-14 16:17:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:17:04,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:04,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:04,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:17:04,206 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash -567407950, now seen corresponding path program 1 times [2021-12-14 16:17:04,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:04,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30402184] [2021-12-14 16:17:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:04,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:17:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:17:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:17:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:17:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:04,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:04,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30402184] [2021-12-14 16:17:04,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30402184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:04,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:04,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:04,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708378165] [2021-12-14 16:17:04,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:04,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:04,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:04,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:04,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:04,309 INFO L87 Difference]: Start difference. First operand 2553 states and 3986 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:06,425 INFO L93 Difference]: Finished difference Result 8997 states and 14250 transitions. [2021-12-14 16:17:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:17:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:06,449 INFO L225 Difference]: With dead ends: 8997 [2021-12-14 16:17:06,449 INFO L226 Difference]: Without dead ends: 6462 [2021-12-14 16:17:06,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:06,456 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 1222 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 2441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:06,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 2316 Invalid, 2441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:17:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2021-12-14 16:17:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 4794. [2021-12-14 16:17:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4794 states, 4364 states have (on average 1.554307974335472) internal successors, (6783), 4381 states have internal predecessors, (6783), 311 states have call successors, (311), 102 states have call predecessors, (311), 118 states have return successors, (408), 326 states have call predecessors, (408), 311 states have call successors, (408) [2021-12-14 16:17:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4794 states to 4794 states and 7502 transitions. [2021-12-14 16:17:06,792 INFO L78 Accepts]: Start accepts. Automaton has 4794 states and 7502 transitions. Word has length 145 [2021-12-14 16:17:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:06,793 INFO L470 AbstractCegarLoop]: Abstraction has 4794 states and 7502 transitions. [2021-12-14 16:17:06,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4794 states and 7502 transitions. [2021-12-14 16:17:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:17:06,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:06,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:06,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:17:06,796 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1660043152, now seen corresponding path program 1 times [2021-12-14 16:17:06,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:06,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756170175] [2021-12-14 16:17:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:06,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:06,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:06,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:17:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:06,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:17:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:06,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:17:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:06,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:17:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:06,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:06,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756170175] [2021-12-14 16:17:06,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756170175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:06,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:06,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:06,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207445935] [2021-12-14 16:17:06,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:06,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:06,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:06,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:06,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:06,903 INFO L87 Difference]: Start difference. First operand 4794 states and 7502 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:08,447 INFO L93 Difference]: Finished difference Result 11310 states and 17975 transitions. [2021-12-14 16:17:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:08,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:17:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:08,484 INFO L225 Difference]: With dead ends: 11310 [2021-12-14 16:17:08,484 INFO L226 Difference]: Without dead ends: 6534 [2021-12-14 16:17:08,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:08,498 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 876 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:08,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1236 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:17:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2021-12-14 16:17:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 4794. [2021-12-14 16:17:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4794 states, 4364 states have (on average 1.5504124656278644) internal successors, (6766), 4381 states have internal predecessors, (6766), 311 states have call successors, (311), 102 states have call predecessors, (311), 118 states have return successors, (408), 326 states have call predecessors, (408), 311 states have call successors, (408) [2021-12-14 16:17:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4794 states to 4794 states and 7485 transitions. [2021-12-14 16:17:08,807 INFO L78 Accepts]: Start accepts. Automaton has 4794 states and 7485 transitions. Word has length 145 [2021-12-14 16:17:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:08,807 INFO L470 AbstractCegarLoop]: Abstraction has 4794 states and 7485 transitions. [2021-12-14 16:17:08,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4794 states and 7485 transitions. [2021-12-14 16:17:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:17:08,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:08,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:08,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:17:08,811 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1352751858, now seen corresponding path program 1 times [2021-12-14 16:17:08,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:08,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877152364] [2021-12-14 16:17:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:08,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:17:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:17:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:17:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:17:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:08,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:08,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877152364] [2021-12-14 16:17:08,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877152364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:08,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:08,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:08,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567388982] [2021-12-14 16:17:08,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:08,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:08,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:08,943 INFO L87 Difference]: Start difference. First operand 4794 states and 7485 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:11,380 INFO L93 Difference]: Finished difference Result 17138 states and 27092 transitions. [2021-12-14 16:17:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:11,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:17:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:11,420 INFO L225 Difference]: With dead ends: 17138 [2021-12-14 16:17:11,420 INFO L226 Difference]: Without dead ends: 12362 [2021-12-14 16:17:11,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:11,435 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 1290 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 2196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:11,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 1617 Invalid, 2196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 16:17:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12362 states. [2021-12-14 16:17:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12362 to 9308. [2021-12-14 16:17:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9308 states, 8478 states have (on average 1.5477707006369428) internal successors, (13122), 8511 states have internal predecessors, (13122), 599 states have call successors, (599), 198 states have call predecessors, (599), 230 states have return successors, (874), 630 states have call predecessors, (874), 599 states have call successors, (874) [2021-12-14 16:17:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9308 states to 9308 states and 14595 transitions. [2021-12-14 16:17:11,895 INFO L78 Accepts]: Start accepts. Automaton has 9308 states and 14595 transitions. Word has length 145 [2021-12-14 16:17:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:11,895 INFO L470 AbstractCegarLoop]: Abstraction has 9308 states and 14595 transitions. [2021-12-14 16:17:11,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 9308 states and 14595 transitions. [2021-12-14 16:17:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:17:11,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:11,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:11,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:17:11,901 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash -489723856, now seen corresponding path program 1 times [2021-12-14 16:17:11,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:11,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829501957] [2021-12-14 16:17:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:11,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:17:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:17:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:17:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:17:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:11,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:11,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829501957] [2021-12-14 16:17:11,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829501957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:11,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:11,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:11,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020627827] [2021-12-14 16:17:11,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:11,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:11,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:11,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:11,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:11,992 INFO L87 Difference]: Start difference. First operand 9308 states and 14595 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:15,227 INFO L93 Difference]: Finished difference Result 33458 states and 53116 transitions. [2021-12-14 16:17:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:17:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:17:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:15,312 INFO L225 Difference]: With dead ends: 33458 [2021-12-14 16:17:15,312 INFO L226 Difference]: Without dead ends: 24168 [2021-12-14 16:17:15,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:17:15,345 INFO L933 BasicCegarLoop]: 754 mSDtfsCounter, 1213 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:15,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1229 Valid, 2300 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 16:17:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24168 states. [2021-12-14 16:17:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24168 to 18365. [2021-12-14 16:17:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18365 states, 16735 states have (on average 1.546220495966537) internal successors, (25876), 16800 states have internal predecessors, (25876), 1175 states have call successors, (1175), 390 states have call predecessors, (1175), 454 states have return successors, (1968), 1238 states have call predecessors, (1968), 1175 states have call successors, (1968) [2021-12-14 16:17:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18365 states to 18365 states and 29019 transitions. [2021-12-14 16:17:16,430 INFO L78 Accepts]: Start accepts. Automaton has 18365 states and 29019 transitions. Word has length 145 [2021-12-14 16:17:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:16,430 INFO L470 AbstractCegarLoop]: Abstraction has 18365 states and 29019 transitions. [2021-12-14 16:17:16,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18365 states and 29019 transitions. [2021-12-14 16:17:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:17:16,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:16,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:16,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:17:16,441 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:16,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2083240754, now seen corresponding path program 1 times [2021-12-14 16:17:16,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:16,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489310049] [2021-12-14 16:17:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:16,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:17:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:17:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:17:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:17:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:16,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489310049] [2021-12-14 16:17:16,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489310049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:16,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:16,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:16,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410061414] [2021-12-14 16:17:16,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:16,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:16,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:16,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:16,555 INFO L87 Difference]: Start difference. First operand 18365 states and 29019 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:18,726 INFO L93 Difference]: Finished difference Result 42830 states and 68812 transitions. [2021-12-14 16:17:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:17:18,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:17:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:18,787 INFO L225 Difference]: With dead ends: 42830 [2021-12-14 16:17:18,787 INFO L226 Difference]: Without dead ends: 24483 [2021-12-14 16:17:18,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:17:18,818 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 1009 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:18,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 1068 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:17:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24483 states. [2021-12-14 16:17:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24483 to 18365. [2021-12-14 16:17:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18365 states, 16735 states have (on average 1.5423364206752315) internal successors, (25811), 16800 states have internal predecessors, (25811), 1175 states have call successors, (1175), 390 states have call predecessors, (1175), 454 states have return successors, (1968), 1238 states have call predecessors, (1968), 1175 states have call successors, (1968) [2021-12-14 16:17:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18365 states to 18365 states and 28954 transitions. [2021-12-14 16:17:19,794 INFO L78 Accepts]: Start accepts. Automaton has 18365 states and 28954 transitions. Word has length 145 [2021-12-14 16:17:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:19,794 INFO L470 AbstractCegarLoop]: Abstraction has 18365 states and 28954 transitions. [2021-12-14 16:17:19,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 18365 states and 28954 transitions. [2021-12-14 16:17:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:17:19,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:19,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:19,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:17:19,804 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1750597616, now seen corresponding path program 1 times [2021-12-14 16:17:19,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:19,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317363176] [2021-12-14 16:17:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:19,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:17:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:17:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:17:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:17:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:19,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317363176] [2021-12-14 16:17:19,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317363176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:19,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:19,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:19,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378122461] [2021-12-14 16:17:19,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:19,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:19,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:19,893 INFO L87 Difference]: Start difference. First operand 18365 states and 28954 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:25,725 INFO L93 Difference]: Finished difference Result 73837 states and 117272 transitions. [2021-12-14 16:17:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:17:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:17:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:25,898 INFO L225 Difference]: With dead ends: 73837 [2021-12-14 16:17:25,898 INFO L226 Difference]: Without dead ends: 55490 [2021-12-14 16:17:25,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:17:25,950 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 1533 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:25,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 2269 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 16:17:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55490 states. [2021-12-14 16:17:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55490 to 36160. [2021-12-14 16:17:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36160 states, 32994 states have (on average 1.54285627689883) internal successors, (50905), 33123 states have internal predecessors, (50905), 2263 states have call successors, (2263), 774 states have call predecessors, (2263), 902 states have return successors, (4578), 2390 states have call predecessors, (4578), 2263 states have call successors, (4578) [2021-12-14 16:17:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36160 states to 36160 states and 57746 transitions. [2021-12-14 16:17:28,653 INFO L78 Accepts]: Start accepts. Automaton has 36160 states and 57746 transitions. Word has length 145 [2021-12-14 16:17:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:28,653 INFO L470 AbstractCegarLoop]: Abstraction has 36160 states and 57746 transitions. [2021-12-14 16:17:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 36160 states and 57746 transitions. [2021-12-14 16:17:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:17:28,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:28,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:28,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:17:28,670 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash -542483410, now seen corresponding path program 1 times [2021-12-14 16:17:28,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:28,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294628074] [2021-12-14 16:17:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:28,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:28,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:28,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:17:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:28,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:17:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:28,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:17:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:28,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:17:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:28,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:28,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294628074] [2021-12-14 16:17:28,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294628074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:28,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:28,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:28,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559842695] [2021-12-14 16:17:28,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:28,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:28,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:28,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:28,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:28,803 INFO L87 Difference]: Start difference. First operand 36160 states and 57746 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:17:38,616 INFO L93 Difference]: Finished difference Result 143790 states and 231138 transitions. [2021-12-14 16:17:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:17:38,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 145 [2021-12-14 16:17:38,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:17:38,982 INFO L225 Difference]: With dead ends: 143790 [2021-12-14 16:17:38,982 INFO L226 Difference]: Without dead ends: 107648 [2021-12-14 16:17:39,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:17:39,277 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 1276 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:17:39,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1291 Valid, 2392 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 16:17:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107648 states. [2021-12-14 16:17:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107648 to 72001. [2021-12-14 16:17:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72001 states, 65827 states have (on average 1.5443359107964816) internal successors, (101659), 66084 states have internal predecessors, (101659), 4375 states have call successors, (4375), 1542 states have call predecessors, (4375), 1798 states have return successors, (11192), 4630 states have call predecessors, (11192), 4375 states have call successors, (11192) [2021-12-14 16:17:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72001 states to 72001 states and 117226 transitions. [2021-12-14 16:17:44,070 INFO L78 Accepts]: Start accepts. Automaton has 72001 states and 117226 transitions. Word has length 145 [2021-12-14 16:17:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:17:44,070 INFO L470 AbstractCegarLoop]: Abstraction has 72001 states and 117226 transitions. [2021-12-14 16:17:44,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-14 16:17:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 72001 states and 117226 transitions. [2021-12-14 16:17:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-14 16:17:44,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:17:44,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:17:44,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:17:44,105 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:17:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:17:44,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1184661552, now seen corresponding path program 1 times [2021-12-14 16:17:44,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:17:44,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935238126] [2021-12-14 16:17:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:17:44,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:17:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:44,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:17:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:44,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 16:17:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:44,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 16:17:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:44,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 16:17:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:44,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-14 16:17:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:17:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:17:44,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:17:44,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935238126] [2021-12-14 16:17:44,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935238126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:17:44,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:17:44,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:17:44,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389644831] [2021-12-14 16:17:44,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:17:44,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:17:44,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:17:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:17:44,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:17:44,216 INFO L87 Difference]: Start difference. First operand 72001 states and 117226 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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)