./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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.06.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 ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:30:00,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:30:00,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:30:00,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:30:00,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:30:00,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:30:00,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:30:00,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:30:00,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:30:00,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:30:00,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:30:00,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:30:00,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:30:00,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:30:00,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:30:00,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:30:00,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:30:00,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:30:00,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:30:00,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:30:00,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:30:00,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:30:00,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:30:00,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:30:00,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:30:00,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:30:00,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:30:00,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:30:00,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:30:00,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:30:00,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:30:00,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:30:00,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:30:00,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:30:00,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:30:00,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:30:00,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:30:00,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:30:00,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:30:00,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:30:00,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:30:00,332 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:30:00,367 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:30:00,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:30:00,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:30:00,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:30:00,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:30:00,370 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:30:00,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:30:00,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:30:00,371 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:30:00,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:30:00,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:30:00,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:30:00,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:30:00,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:30:00,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:30:00,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:30:00,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:30:00,374 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:30:00,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:30:00,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:30:00,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:30:00,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:30:00,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:30:00,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:30:00,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:30:00,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:30:00,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:30:00,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:30:00,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:30:00,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:30:00,376 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:30:00,377 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:30:00,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:30:00,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 [2021-12-28 02:30:00,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:30:00,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:30:00,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:30:00,724 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:30:00,725 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:30:00,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2021-12-28 02:30:00,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f7ff733/e6bae97afb90459aaf771dcf79d7a342/FLAG6fd33b064 [2021-12-28 02:30:01,208 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:30:01,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2021-12-28 02:30:01,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f7ff733/e6bae97afb90459aaf771dcf79d7a342/FLAG6fd33b064 [2021-12-28 02:30:01,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f7ff733/e6bae97afb90459aaf771dcf79d7a342 [2021-12-28 02:30:01,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:30:01,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:30:01,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:30:01,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:30:01,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:30:01,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:30:01" (1/1) ... [2021-12-28 02:30:01,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d0c33f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:01, skipping insertion in model container [2021-12-28 02:30:01,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:30:01" (1/1) ... [2021-12-28 02:30:01,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:30:01,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:30:01,760 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.06.cil-1.c[913,926] [2021-12-28 02:30:01,811 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.06.cil-1.c[5977,5990] [2021-12-28 02:30:01,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:30:01,916 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:30:01,944 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.06.cil-1.c[913,926] [2021-12-28 02:30:01,963 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.06.cil-1.c[5977,5990] [2021-12-28 02:30:02,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:30:02,053 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:30:02,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02 WrapperNode [2021-12-28 02:30:02,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:30:02,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:30:02,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:30:02,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:30:02,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,139 INFO L137 Inliner]: procedures = 60, calls = 67, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 712 [2021-12-28 02:30:02,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:30:02,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:30:02,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:30:02,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:30:02,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:30:02,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:30:02,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:30:02,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:30:02,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (1/1) ... [2021-12-28 02:30:02,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:30:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:02,244 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) [2021-12-28 02:30:02,258 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 [2021-12-28 02:30:02,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:30:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:30:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:30:02,289 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-28 02:30:02,289 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-28 02:30:02,290 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:30:02,290 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:30:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:30:02,291 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:30:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:30:02,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:30:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:30:02,292 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:30:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:30:02,292 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:30:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:30:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:30:02,293 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:30:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:30:02,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:30:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:30:02,294 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:30:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:30:02,294 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:30:02,387 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:30:02,393 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:30:02,955 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:30:02,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:30:02,972 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-28 02:30:02,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:30:02 BoogieIcfgContainer [2021-12-28 02:30:02,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:30:02,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:30:02,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:30:02,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:30:02,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:30:01" (1/3) ... [2021-12-28 02:30:02,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb6ebaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:30:02, skipping insertion in model container [2021-12-28 02:30:02,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:02" (2/3) ... [2021-12-28 02:30:02,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb6ebaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:30:02, skipping insertion in model container [2021-12-28 02:30:02,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:30:02" (3/3) ... [2021-12-28 02:30:02,982 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2021-12-28 02:30:02,986 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:30:02,986 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:30:03,036 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:30:03,045 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 [2021-12-28 02:30:03,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:30:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-28 02:30:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 02:30:03,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:03,088 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] [2021-12-28 02:30:03,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash -953270584, now seen corresponding path program 1 times [2021-12-28 02:30:03,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:03,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385114499] [2021-12-28 02:30:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:03,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:03,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:03,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 02:30:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:03,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:03,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385114499] [2021-12-28 02:30:03,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385114499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:03,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:03,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:03,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821316201] [2021-12-28 02:30:03,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:03,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:03,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:03,372 INFO L87 Difference]: Start difference. First operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) 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) [2021-12-28 02:30:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:03,649 INFO L93 Difference]: Finished difference Result 674 states and 1072 transitions. [2021-12-28 02:30:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:03,653 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 [2021-12-28 02:30:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:03,665 INFO L225 Difference]: With dead ends: 674 [2021-12-28 02:30:03,666 INFO L226 Difference]: Without dead ends: 371 [2021-12-28 02:30:03,670 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 [2021-12-28 02:30:03,674 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 597 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:03,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 784 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:30:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-28 02:30:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 365. [2021-12-28 02:30:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 320 states have (on average 1.496875) internal successors, (479), 325 states have internal predecessors, (479), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2021-12-28 02:30:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 545 transitions. [2021-12-28 02:30:03,733 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 545 transitions. Word has length 44 [2021-12-28 02:30:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:03,734 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 545 transitions. [2021-12-28 02:30:03,734 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) [2021-12-28 02:30:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 545 transitions. [2021-12-28 02:30:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 02:30:03,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:03,743 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] [2021-12-28 02:30:03,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:30:03,747 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 215630895, now seen corresponding path program 1 times [2021-12-28 02:30:03,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:03,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254599797] [2021-12-28 02:30:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:03,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:03,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:03,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 02:30:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:03,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:03,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254599797] [2021-12-28 02:30:03,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254599797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:03,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:03,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:03,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945749940] [2021-12-28 02:30:03,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:03,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:03,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:03,851 INFO L87 Difference]: Start difference. First operand 365 states and 545 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) [2021-12-28 02:30:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:04,144 INFO L93 Difference]: Finished difference Result 613 states and 885 transitions. [2021-12-28 02:30:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:04,149 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 [2021-12-28 02:30:04,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:04,154 INFO L225 Difference]: With dead ends: 613 [2021-12-28 02:30:04,154 INFO L226 Difference]: Without dead ends: 489 [2021-12-28 02:30:04,158 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 [2021-12-28 02:30:04,159 INFO L933 BasicCegarLoop]: 500 mSDtfsCounter, 249 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:04,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1000 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:30:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-28 02:30:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 432. [2021-12-28 02:30:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 381 states have (on average 1.4776902887139107) internal successors, (563), 386 states have internal predecessors, (563), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (37), 31 states have call predecessors, (37), 31 states have call successors, (37) [2021-12-28 02:30:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 635 transitions. [2021-12-28 02:30:04,215 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 635 transitions. Word has length 45 [2021-12-28 02:30:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:04,216 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 635 transitions. [2021-12-28 02:30:04,216 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) [2021-12-28 02:30:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 635 transitions. [2021-12-28 02:30:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 02:30:04,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:04,228 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] [2021-12-28 02:30:04,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:30:04,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:04,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1068726566, now seen corresponding path program 1 times [2021-12-28 02:30:04,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:04,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674308234] [2021-12-28 02:30:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:04,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 02:30:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:04,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674308234] [2021-12-28 02:30:04,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674308234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:04,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:04,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:04,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275934925] [2021-12-28 02:30:04,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:04,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:04,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:04,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:04,300 INFO L87 Difference]: Start difference. First operand 432 states and 635 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) [2021-12-28 02:30:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:04,451 INFO L93 Difference]: Finished difference Result 840 states and 1194 transitions. [2021-12-28 02:30:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:04,451 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 [2021-12-28 02:30:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:04,456 INFO L225 Difference]: With dead ends: 840 [2021-12-28 02:30:04,456 INFO L226 Difference]: Without dead ends: 649 [2021-12-28 02:30:04,459 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 [2021-12-28 02:30:04,463 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 606 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:04,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 783 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-28 02:30:04,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 597. [2021-12-28 02:30:04,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 527 states have (on average 1.4288425047438331) internal successors, (753), 535 states have internal predecessors, (753), 46 states have call successors, (46), 22 states have call predecessors, (46), 22 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2021-12-28 02:30:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 853 transitions. [2021-12-28 02:30:04,499 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 853 transitions. Word has length 45 [2021-12-28 02:30:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:04,499 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 853 transitions. [2021-12-28 02:30:04,500 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) [2021-12-28 02:30:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 853 transitions. [2021-12-28 02:30:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-28 02:30:04,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:04,502 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] [2021-12-28 02:30:04,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:30:04,502 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash -642295496, now seen corresponding path program 1 times [2021-12-28 02:30:04,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:04,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992101279] [2021-12-28 02:30:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:04,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 02:30:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:30:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:30:04,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992101279] [2021-12-28 02:30:04,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992101279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:04,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:04,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:04,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256297048] [2021-12-28 02:30:04,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:04,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:04,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:04,565 INFO L87 Difference]: Start difference. First operand 597 states and 853 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) [2021-12-28 02:30:04,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:04,841 INFO L93 Difference]: Finished difference Result 1181 states and 1638 transitions. [2021-12-28 02:30:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:04,842 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 [2021-12-28 02:30:04,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:04,847 INFO L225 Difference]: With dead ends: 1181 [2021-12-28 02:30:04,847 INFO L226 Difference]: Without dead ends: 825 [2021-12-28 02:30:04,848 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 [2021-12-28 02:30:04,849 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 233 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:04,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1055 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:30:04,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-12-28 02:30:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 787. [2021-12-28 02:30:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 693 states have (on average 1.3751803751803753) internal successors, (953), 703 states have internal predecessors, (953), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2021-12-28 02:30:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1091 transitions. [2021-12-28 02:30:04,881 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1091 transitions. Word has length 62 [2021-12-28 02:30:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:04,882 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1091 transitions. [2021-12-28 02:30:04,882 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) [2021-12-28 02:30:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1091 transitions. [2021-12-28 02:30:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 02:30:04,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:04,885 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] [2021-12-28 02:30:04,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:30:04,885 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash -897620696, now seen corresponding path program 1 times [2021-12-28 02:30:04,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282825049] [2021-12-28 02:30:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:04,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:30:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:30:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 02:30:04,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:04,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282825049] [2021-12-28 02:30:04,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282825049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:04,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:04,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:04,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25604002] [2021-12-28 02:30:04,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:04,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:04,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:04,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:04,940 INFO L87 Difference]: Start difference. First operand 787 states and 1091 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) [2021-12-28 02:30:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:05,096 INFO L93 Difference]: Finished difference Result 1440 states and 1944 transitions. [2021-12-28 02:30:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:05,097 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 [2021-12-28 02:30:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:05,102 INFO L225 Difference]: With dead ends: 1440 [2021-12-28 02:30:05,102 INFO L226 Difference]: Without dead ends: 986 [2021-12-28 02:30:05,104 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 [2021-12-28 02:30:05,104 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 593 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:05,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 780 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-12-28 02:30:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 931. [2021-12-28 02:30:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 821 states have (on average 1.3447015834348355) internal successors, (1104), 833 states have internal predecessors, (1104), 68 states have call successors, (68), 36 states have call predecessors, (68), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2021-12-28 02:30:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1264 transitions. [2021-12-28 02:30:05,149 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1264 transitions. Word has length 67 [2021-12-28 02:30:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:05,150 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1264 transitions. [2021-12-28 02:30:05,150 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) [2021-12-28 02:30:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1264 transitions. [2021-12-28 02:30:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:30:05,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:05,152 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] [2021-12-28 02:30:05,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:30:05,153 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:05,153 INFO L85 PathProgramCache]: Analyzing trace with hash -252493793, now seen corresponding path program 1 times [2021-12-28 02:30:05,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:05,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899404710] [2021-12-28 02:30:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:05,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:05,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:05,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:05,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:30:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:30:05,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:05,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899404710] [2021-12-28 02:30:05,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899404710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:05,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047319015] [2021-12-28 02:30:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:05,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:05,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:05,251 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) [2021-12-28 02:30:05,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:30:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:05,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 02:30:05,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:05,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:30:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 02:30:05,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047319015] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:05,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:30:05,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-28 02:30:05,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898335551] [2021-12-28 02:30:05,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:05,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:05,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:05,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:30:05,757 INFO L87 Difference]: Start difference. First operand 931 states and 1264 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) [2021-12-28 02:30:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:05,889 INFO L93 Difference]: Finished difference Result 987 states and 1332 transitions. [2021-12-28 02:30:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 02:30:05,890 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 [2021-12-28 02:30:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:05,895 INFO L225 Difference]: With dead ends: 987 [2021-12-28 02:30:05,895 INFO L226 Difference]: Without dead ends: 984 [2021-12-28 02:30:05,896 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 [2021-12-28 02:30:05,900 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 811 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:05,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 546 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-12-28 02:30:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 930. [2021-12-28 02:30:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 821 states have (on average 1.3422655298416566) internal successors, (1102), 832 states have internal predecessors, (1102), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2021-12-28 02:30:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1261 transitions. [2021-12-28 02:30:05,948 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1261 transitions. Word has length 68 [2021-12-28 02:30:05,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:05,950 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1261 transitions. [2021-12-28 02:30:05,950 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) [2021-12-28 02:30:05,950 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1261 transitions. [2021-12-28 02:30:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:30:05,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:05,952 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] [2021-12-28 02:30:05,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:30:06,166 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 [2021-12-28 02:30:06,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 761646347, now seen corresponding path program 1 times [2021-12-28 02:30:06,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:06,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241747549] [2021-12-28 02:30:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:06,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:06,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:06,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:06,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:30:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:30:06,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:06,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241747549] [2021-12-28 02:30:06,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241747549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:06,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158046875] [2021-12-28 02:30:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:06,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:06,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:06,289 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) [2021-12-28 02:30:06,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:30:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:06,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:30:06,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:06,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:30:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 02:30:06,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158046875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:30:06,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:30:06,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-28 02:30:06,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742006768] [2021-12-28 02:30:06,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:30:06,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 02:30:06,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:06,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 02:30:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:30:06,796 INFO L87 Difference]: Start difference. First operand 930 states and 1261 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) [2021-12-28 02:30:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:07,931 INFO L93 Difference]: Finished difference Result 2630 states and 3481 transitions. [2021-12-28 02:30:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-28 02:30:07,931 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 [2021-12-28 02:30:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:07,941 INFO L225 Difference]: With dead ends: 2630 [2021-12-28 02:30:07,941 INFO L226 Difference]: Without dead ends: 2086 [2021-12-28 02:30:07,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-28 02:30:07,944 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 1343 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:07,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 2757 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:30:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-12-28 02:30:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1319. [2021-12-28 02:30:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1171 states have (on average 1.3116994022203246) internal successors, (1536), 1190 states have internal predecessors, (1536), 87 states have call successors, (87), 50 states have call predecessors, (87), 59 states have return successors, (126), 79 states have call predecessors, (126), 84 states have call successors, (126) [2021-12-28 02:30:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1749 transitions. [2021-12-28 02:30:08,026 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1749 transitions. Word has length 69 [2021-12-28 02:30:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:08,027 INFO L470 AbstractCegarLoop]: Abstraction has 1319 states and 1749 transitions. [2021-12-28 02:30:08,027 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) [2021-12-28 02:30:08,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1749 transitions. [2021-12-28 02:30:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-28 02:30:08,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:08,031 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] [2021-12-28 02:30:08,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:30:08,245 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 [2021-12-28 02:30:08,246 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1915961298, now seen corresponding path program 1 times [2021-12-28 02:30:08,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:08,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112879391] [2021-12-28 02:30:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:08,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:30:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 02:30:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 02:30:08,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:08,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112879391] [2021-12-28 02:30:08,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112879391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:08,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:08,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:08,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100064733] [2021-12-28 02:30:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:08,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:08,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:08,303 INFO L87 Difference]: Start difference. First operand 1319 states and 1749 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 02:30:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:08,464 INFO L93 Difference]: Finished difference Result 2084 states and 2736 transitions. [2021-12-28 02:30:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:08,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-28 02:30:08,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:08,469 INFO L225 Difference]: With dead ends: 2084 [2021-12-28 02:30:08,469 INFO L226 Difference]: Without dead ends: 1239 [2021-12-28 02:30:08,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:08,472 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 608 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:08,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 797 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-12-28 02:30:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1182. [2021-12-28 02:30:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1050 states have (on average 1.3123809523809524) internal successors, (1378), 1068 states have internal predecessors, (1378), 79 states have call successors, (79), 44 states have call predecessors, (79), 51 states have return successors, (112), 70 states have call predecessors, (112), 76 states have call successors, (112) [2021-12-28 02:30:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1569 transitions. [2021-12-28 02:30:08,522 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1569 transitions. Word has length 88 [2021-12-28 02:30:08,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:08,522 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 1569 transitions. [2021-12-28 02:30:08,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 02:30:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1569 transitions. [2021-12-28 02:30:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 02:30:08,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:08,526 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] [2021-12-28 02:30:08,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:30:08,526 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1247723609, now seen corresponding path program 1 times [2021-12-28 02:30:08,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:08,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778057181] [2021-12-28 02:30:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:08,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 02:30:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 02:30:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:30:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 02:30:08,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:08,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778057181] [2021-12-28 02:30:08,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778057181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:08,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279666745] [2021-12-28 02:30:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:08,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:08,584 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) [2021-12-28 02:30:08,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:30:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:08,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:30:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:30:08,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:30:08,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279666745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:08,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:30:08,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-28 02:30:08,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601048093] [2021-12-28 02:30:08,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:08,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:30:08,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:08,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:30:08,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:30:08,826 INFO L87 Difference]: Start difference. First operand 1182 states and 1569 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) [2021-12-28 02:30:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:08,866 INFO L93 Difference]: Finished difference Result 1561 states and 2037 transitions. [2021-12-28 02:30:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:30:08,867 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 [2021-12-28 02:30:08,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:08,868 INFO L225 Difference]: With dead ends: 1561 [2021-12-28 02:30:08,869 INFO L226 Difference]: Without dead ends: 235 [2021-12-28 02:30:08,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:30:08,871 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 62 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 928 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 [2021-12-28 02:30:08,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 928 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:30:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-28 02:30:08,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-12-28 02:30:08,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5533980582524272) internal successors, (320), 208 states have internal predecessors, (320), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-28 02:30:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 362 transitions. [2021-12-28 02:30:08,880 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 362 transitions. Word has length 103 [2021-12-28 02:30:08,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:08,880 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 362 transitions. [2021-12-28 02:30:08,880 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) [2021-12-28 02:30:08,880 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 362 transitions. [2021-12-28 02:30:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:08,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:08,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:30:08,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:30:09,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:09,108 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:09,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash 490472779, now seen corresponding path program 1 times [2021-12-28 02:30:09,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:09,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090383209] [2021-12-28 02:30:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:09,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:09,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:09,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090383209] [2021-12-28 02:30:09,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090383209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:09,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:09,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:30:09,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898325256] [2021-12-28 02:30:09,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:09,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:30:09,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:09,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:30:09,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:09,187 INFO L87 Difference]: Start difference. First operand 235 states and 362 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:09,722 INFO L93 Difference]: Finished difference Result 536 states and 840 transitions. [2021-12-28 02:30:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:30:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:09,724 INFO L225 Difference]: With dead ends: 536 [2021-12-28 02:30:09,725 INFO L226 Difference]: Without dead ends: 311 [2021-12-28 02:30:09,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:30:09,726 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 591 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:09,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 647 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:30:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-28 02:30:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 235. [2021-12-28 02:30:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 208 states have internal predecessors, (319), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-28 02:30:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 361 transitions. [2021-12-28 02:30:09,740 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 361 transitions. Word has length 113 [2021-12-28 02:30:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:09,740 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 361 transitions. [2021-12-28 02:30:09,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 361 transitions. [2021-12-28 02:30:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:09,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:09,742 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] [2021-12-28 02:30:09,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:30:09,742 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:09,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1937785843, now seen corresponding path program 1 times [2021-12-28 02:30:09,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:09,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157399170] [2021-12-28 02:30:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:09,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:09,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157399170] [2021-12-28 02:30:09,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157399170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:09,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:09,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:30:09,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846064408] [2021-12-28 02:30:09,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:09,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:30:09,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:09,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:30:09,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:30:09,839 INFO L87 Difference]: Start difference. First operand 235 states and 361 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:11,100 INFO L93 Difference]: Finished difference Result 833 states and 1312 transitions. [2021-12-28 02:30:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:30:11,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:11,103 INFO L225 Difference]: With dead ends: 833 [2021-12-28 02:30:11,103 INFO L226 Difference]: Without dead ends: 613 [2021-12-28 02:30:11,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:30:11,104 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 879 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:11,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 1028 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:30:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-12-28 02:30:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 460. [2021-12-28 02:30:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 409 states have (on average 1.5623471882640587) internal successors, (639), 412 states have internal predecessors, (639), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2021-12-28 02:30:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 714 transitions. [2021-12-28 02:30:11,126 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 714 transitions. Word has length 113 [2021-12-28 02:30:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:11,127 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 714 transitions. [2021-12-28 02:30:11,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 714 transitions. [2021-12-28 02:30:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:11,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:11,128 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] [2021-12-28 02:30:11,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:30:11,129 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:11,129 INFO L85 PathProgramCache]: Analyzing trace with hash -943533047, now seen corresponding path program 1 times [2021-12-28 02:30:11,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:11,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003063942] [2021-12-28 02:30:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:11,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:11,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:11,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:11,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:11,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:11,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:11,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003063942] [2021-12-28 02:30:11,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003063942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:11,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:11,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:11,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642206708] [2021-12-28 02:30:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:11,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:11,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:11,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:11,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:11,240 INFO L87 Difference]: Start difference. First operand 460 states and 714 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:12,932 INFO L93 Difference]: Finished difference Result 1366 states and 2152 transitions. [2021-12-28 02:30:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:12,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:12,936 INFO L225 Difference]: With dead ends: 1366 [2021-12-28 02:30:12,937 INFO L226 Difference]: Without dead ends: 921 [2021-12-28 02:30:12,938 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 [2021-12-28 02:30:12,939 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 883 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:12,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 1791 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:30:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-12-28 02:30:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 670. [2021-12-28 02:30:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 597 states have (on average 1.5561139028475712) internal successors, (929), 601 states have internal predecessors, (929), 52 states have call successors, (52), 19 states have call predecessors, (52), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-28 02:30:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1036 transitions. [2021-12-28 02:30:12,983 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1036 transitions. Word has length 113 [2021-12-28 02:30:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:12,984 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1036 transitions. [2021-12-28 02:30:12,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1036 transitions. [2021-12-28 02:30:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:12,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:12,986 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] [2021-12-28 02:30:12,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:30:12,986 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash 407852171, now seen corresponding path program 1 times [2021-12-28 02:30:12,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:12,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402244574] [2021-12-28 02:30:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:12,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:13,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:13,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402244574] [2021-12-28 02:30:13,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402244574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:13,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:13,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:13,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517712742] [2021-12-28 02:30:13,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:13,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:13,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:13,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:13,093 INFO L87 Difference]: Start difference. First operand 670 states and 1036 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:14,562 INFO L93 Difference]: Finished difference Result 2151 states and 3382 transitions. [2021-12-28 02:30:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:14,572 INFO L225 Difference]: With dead ends: 2151 [2021-12-28 02:30:14,574 INFO L226 Difference]: Without dead ends: 1496 [2021-12-28 02:30:14,576 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 [2021-12-28 02:30:14,577 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 946 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:14,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 1234 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:30:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-12-28 02:30:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1091. [2021-12-28 02:30:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 974 states have (on average 1.5503080082135523) internal successors, (1510), 980 states have internal predecessors, (1510), 82 states have call successors, (82), 31 states have call predecessors, (82), 34 states have return successors, (93), 83 states have call predecessors, (93), 80 states have call successors, (93) [2021-12-28 02:30:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1685 transitions. [2021-12-28 02:30:14,654 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1685 transitions. Word has length 113 [2021-12-28 02:30:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:14,654 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1685 transitions. [2021-12-28 02:30:14,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1685 transitions. [2021-12-28 02:30:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:14,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:14,656 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] [2021-12-28 02:30:14,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:30:14,656 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:14,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1211122743, now seen corresponding path program 1 times [2021-12-28 02:30:14,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:14,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867248661] [2021-12-28 02:30:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:14,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:14,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:14,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867248661] [2021-12-28 02:30:14,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867248661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:14,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:14,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:14,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732884562] [2021-12-28 02:30:14,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:14,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:14,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:14,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:14,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:14,749 INFO L87 Difference]: Start difference. First operand 1091 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:16,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:16,352 INFO L93 Difference]: Finished difference Result 3664 states and 5743 transitions. [2021-12-28 02:30:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:16,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:16,363 INFO L225 Difference]: With dead ends: 3664 [2021-12-28 02:30:16,363 INFO L226 Difference]: Without dead ends: 2588 [2021-12-28 02:30:16,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:30:16,366 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 878 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:16,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 1779 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:30:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-12-28 02:30:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1934. [2021-12-28 02:30:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1729 states have (on average 1.545401966454598) internal successors, (2672), 1739 states have internal predecessors, (2672), 142 states have call successors, (142), 55 states have call predecessors, (142), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2021-12-28 02:30:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2989 transitions. [2021-12-28 02:30:16,473 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2989 transitions. Word has length 113 [2021-12-28 02:30:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:16,473 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 2989 transitions. [2021-12-28 02:30:16,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2989 transitions. [2021-12-28 02:30:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:16,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:16,483 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] [2021-12-28 02:30:16,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:30:16,483 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2094631733, now seen corresponding path program 1 times [2021-12-28 02:30:16,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:16,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390427055] [2021-12-28 02:30:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:16,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:16,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:16,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390427055] [2021-12-28 02:30:16,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390427055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:16,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:16,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:16,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759672320] [2021-12-28 02:30:16,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:16,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:16,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:16,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:16,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:16,578 INFO L87 Difference]: Start difference. First operand 1934 states and 2989 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:18,111 INFO L93 Difference]: Finished difference Result 6682 states and 10469 transitions. [2021-12-28 02:30:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:18,134 INFO L225 Difference]: With dead ends: 6682 [2021-12-28 02:30:18,134 INFO L226 Difference]: Without dead ends: 4763 [2021-12-28 02:30:18,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:30:18,141 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 873 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:18,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 1771 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:30:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2021-12-28 02:30:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 3634. [2021-12-28 02:30:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3253 states have (on average 1.5431909007070397) internal successors, (5020), 3271 states have internal predecessors, (5020), 262 states have call successors, (262), 103 states have call predecessors, (262), 118 states have return successors, (357), 275 states have call predecessors, (357), 260 states have call successors, (357) [2021-12-28 02:30:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5639 transitions. [2021-12-28 02:30:18,393 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5639 transitions. Word has length 113 [2021-12-28 02:30:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:18,393 INFO L470 AbstractCegarLoop]: Abstraction has 3634 states and 5639 transitions. [2021-12-28 02:30:18,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5639 transitions. [2021-12-28 02:30:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:18,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:18,397 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] [2021-12-28 02:30:18,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:30:18,397 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:18,398 INFO L85 PathProgramCache]: Analyzing trace with hash 259753549, now seen corresponding path program 1 times [2021-12-28 02:30:18,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:18,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361531359] [2021-12-28 02:30:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:18,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:18,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361531359] [2021-12-28 02:30:18,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361531359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:18,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:18,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:18,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078807230] [2021-12-28 02:30:18,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:18,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:18,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:18,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:18,527 INFO L87 Difference]: Start difference. First operand 3634 states and 5639 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:20,190 INFO L93 Difference]: Finished difference Result 12736 states and 20013 transitions. [2021-12-28 02:30:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:20,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:20,229 INFO L225 Difference]: With dead ends: 12736 [2021-12-28 02:30:20,229 INFO L226 Difference]: Without dead ends: 9117 [2021-12-28 02:30:20,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:30:20,241 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 872 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:20,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 1766 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:30:20,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9117 states. [2021-12-28 02:30:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9117 to 7047. [2021-12-28 02:30:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 6314 states have (on average 1.5416534684827368) internal successors, (9734), 6348 states have internal predecessors, (9734), 502 states have call successors, (502), 199 states have call predecessors, (502), 230 states have return successors, (775), 531 states have call predecessors, (775), 500 states have call successors, (775) [2021-12-28 02:30:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11011 transitions. [2021-12-28 02:30:20,715 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11011 transitions. Word has length 113 [2021-12-28 02:30:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:20,715 INFO L470 AbstractCegarLoop]: Abstraction has 7047 states and 11011 transitions. [2021-12-28 02:30:20,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11011 transitions. [2021-12-28 02:30:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:20,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:20,721 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] [2021-12-28 02:30:20,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:30:20,721 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:20,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2136816779, now seen corresponding path program 1 times [2021-12-28 02:30:20,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:20,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969379121] [2021-12-28 02:30:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:20,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:20,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:20,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969379121] [2021-12-28 02:30:20,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969379121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:20,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:20,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:20,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804620501] [2021-12-28 02:30:20,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:20,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:20,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:20,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:20,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:20,812 INFO L87 Difference]: Start difference. First operand 7047 states and 11011 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:23,263 INFO L93 Difference]: Finished difference Result 27819 states and 43773 transitions. [2021-12-28 02:30:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:30:23,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:23,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:23,355 INFO L225 Difference]: With dead ends: 27819 [2021-12-28 02:30:23,355 INFO L226 Difference]: Without dead ends: 20787 [2021-12-28 02:30:23,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:30:23,386 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 1123 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:23,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 1751 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:30:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20787 states. [2021-12-28 02:30:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20787 to 13808. [2021-12-28 02:30:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 12403 states have (on average 1.54349754091752) internal successors, (19144), 12469 states have internal predecessors, (19144), 950 states have call successors, (950), 391 states have call predecessors, (950), 454 states have return successors, (1741), 1011 states have call predecessors, (1741), 948 states have call successors, (1741) [2021-12-28 02:30:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 21835 transitions. [2021-12-28 02:30:24,289 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 21835 transitions. Word has length 113 [2021-12-28 02:30:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:24,289 INFO L470 AbstractCegarLoop]: Abstraction has 13808 states and 21835 transitions. [2021-12-28 02:30:24,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 21835 transitions. [2021-12-28 02:30:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:24,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:24,300 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] [2021-12-28 02:30:24,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:30:24,301 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1366083213, now seen corresponding path program 1 times [2021-12-28 02:30:24,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335216373] [2021-12-28 02:30:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:24,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:24,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:24,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335216373] [2021-12-28 02:30:24,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335216373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:24,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:24,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:24,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910362872] [2021-12-28 02:30:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:24,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:24,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:24,452 INFO L87 Difference]: Start difference. First operand 13808 states and 21835 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:28,153 INFO L93 Difference]: Finished difference Result 53954 states and 85811 transitions. [2021-12-28 02:30:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:30:28,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:28,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:28,337 INFO L225 Difference]: With dead ends: 53954 [2021-12-28 02:30:28,337 INFO L226 Difference]: Without dead ends: 40161 [2021-12-28 02:30:28,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:30:28,408 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 922 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:28,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 1834 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:30:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40161 states. [2021-12-28 02:30:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40161 to 26657. [2021-12-28 02:30:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26657 states, 23940 states have (on average 1.5389306599832915) internal successors, (36842), 24070 states have internal predecessors, (36842), 1814 states have call successors, (1814), 775 states have call predecessors, (1814), 902 states have return successors, (4127), 1939 states have call predecessors, (4127), 1812 states have call successors, (4127) [2021-12-28 02:30:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26657 states to 26657 states and 42783 transitions. [2021-12-28 02:30:30,328 INFO L78 Accepts]: Start accepts. Automaton has 26657 states and 42783 transitions. Word has length 113 [2021-12-28 02:30:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:30,329 INFO L470 AbstractCegarLoop]: Abstraction has 26657 states and 42783 transitions. [2021-12-28 02:30:30,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 26657 states and 42783 transitions. [2021-12-28 02:30:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:30,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:30,347 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] [2021-12-28 02:30:30,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:30:30,348 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash 371389515, now seen corresponding path program 1 times [2021-12-28 02:30:30,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090202111] [2021-12-28 02:30:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:30,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:30,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:30,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:30,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:30,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:30,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:30,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:30,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090202111] [2021-12-28 02:30:30,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090202111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:30,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:30,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:30,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099867413] [2021-12-28 02:30:30,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:30,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:30,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:30,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:30,437 INFO L87 Difference]: Start difference. First operand 26657 states and 42783 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:36,710 INFO L93 Difference]: Finished difference Result 103121 states and 166425 transitions. [2021-12-28 02:30:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:30:36,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:37,067 INFO L225 Difference]: With dead ends: 103121 [2021-12-28 02:30:37,067 INFO L226 Difference]: Without dead ends: 76479 [2021-12-28 02:30:37,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:30:37,155 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1043 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:37,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 1741 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:30:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76479 states. [2021-12-28 02:30:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76479 to 52930. [2021-12-28 02:30:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52930 states, 47653 states have (on average 1.5413929868004113) internal successors, (73452), 47911 states have internal predecessors, (73452), 3478 states have call successors, (3478), 1543 states have call predecessors, (3478), 1798 states have return successors, (10293), 3731 states have call predecessors, (10293), 3476 states have call successors, (10293) [2021-12-28 02:30:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52930 states to 52930 states and 87223 transitions. [2021-12-28 02:30:40,967 INFO L78 Accepts]: Start accepts. Automaton has 52930 states and 87223 transitions. Word has length 113 [2021-12-28 02:30:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:40,968 INFO L470 AbstractCegarLoop]: Abstraction has 52930 states and 87223 transitions. [2021-12-28 02:30:40,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 52930 states and 87223 transitions. [2021-12-28 02:30:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-28 02:30:40,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:40,997 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] [2021-12-28 02:30:40,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:30:40,998 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:40,998 INFO L85 PathProgramCache]: Analyzing trace with hash -214886707, now seen corresponding path program 1 times [2021-12-28 02:30:40,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:40,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380673266] [2021-12-28 02:30:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:40,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:41,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:41,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-28 02:30:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:41,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 02:30:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:41,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:30:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:41,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:30:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:41,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:41,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380673266] [2021-12-28 02:30:41,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380673266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:41,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:41,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:41,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360378961] [2021-12-28 02:30:41,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:41,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:41,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:41,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:41,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:41,089 INFO L87 Difference]: Start difference. First operand 52930 states and 87223 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:51,659 INFO L93 Difference]: Finished difference Result 200880 states and 333039 transitions. [2021-12-28 02:30:51,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:30:51,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-28 02:30:51,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:52,296 INFO L225 Difference]: With dead ends: 200880 [2021-12-28 02:30:52,297 INFO L226 Difference]: Without dead ends: 147965 [2021-12-28 02:30:52,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:30:52,432 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 955 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:52,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 1265 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:30:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147965 states. [2021-12-28 02:30:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147965 to 105347.