./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.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.11.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 ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:30:45,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:30:45,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:30:45,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:30:45,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:30:45,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:30:45,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:30:45,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:30:45,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:30:45,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:30:45,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:30:45,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:30:45,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:30:45,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:30:45,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:30:45,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:30:45,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:30:45,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:30:45,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:30:45,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:30:45,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:30:45,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:30:45,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:30:45,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:30:45,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:30:45,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:30:45,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:30:45,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:30:45,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:30:45,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:30:45,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:30:45,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:30:45,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:30:45,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:30:45,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:30:45,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:30:45,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:30:45,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:30:45,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:30:45,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:30:45,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:30:45,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:30:45,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:30:45,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:30:45,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:30:45,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:30:45,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:30:45,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:30:45,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:30:45,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:30:45,363 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:30:45,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:30:45,364 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:30:45,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:30:45,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:30:45,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:30:45,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:30:45,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:30:45,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:30:45,365 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:30:45,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:30:45,365 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:30:45,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:30:45,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:30:45,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:30:45,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:30:45,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:30:45,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:30:45,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:30:45,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:30:45,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:30:45,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:30:45,367 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:30:45,367 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:30:45,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:30:45,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5431a1a166986f09cf6e8d9d49f276cd283b8e2ac68f401ad73509be5780b8 [2021-12-28 02:30:45,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:30:45,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:30:45,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:30:45,621 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:30:45,621 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:30:45,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2021-12-28 02:30:45,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286ff8913/b7c3a287c16548f5b9132f1a321a9b44/FLAGe5324ac61 [2021-12-28 02:30:46,099 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:30:46,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2021-12-28 02:30:46,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286ff8913/b7c3a287c16548f5b9132f1a321a9b44/FLAGe5324ac61 [2021-12-28 02:30:46,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286ff8913/b7c3a287c16548f5b9132f1a321a9b44 [2021-12-28 02:30:46,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:30:46,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:30:46,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:30:46,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:30:46,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:30:46,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76385d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46, skipping insertion in model container [2021-12-28 02:30:46,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:30:46,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:30:46,322 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.11.cil-1.c[913,926] [2021-12-28 02:30:46,396 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.11.cil-1.c[5977,5990] [2021-12-28 02:30:46,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:30:46,519 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:30:46,528 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.11.cil-1.c[913,926] [2021-12-28 02:30:46,548 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.11.cil-1.c[5977,5990] [2021-12-28 02:30:46,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:30:46,613 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:30:46,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46 WrapperNode [2021-12-28 02:30:46,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:30:46,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:30:46,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:30:46,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:30:46,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,689 INFO L137 Inliner]: procedures = 70, calls = 82, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 1002 [2021-12-28 02:30:46,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:30:46,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:30:46,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:30:46,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:30:46,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:30:46,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:30:46,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:30:46,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:30:46,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (1/1) ... [2021-12-28 02:30:46,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:30:46,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:46,793 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 02:30:46,809 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 02:30:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:30:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:30:46,835 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:30:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-28 02:30:46,836 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-28 02:30:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:30:46,840 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:30:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:30:46,840 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:30:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:30:46,840 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:30:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:30:46,841 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:30:46,841 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:30:46,841 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:30:46,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:30:46,841 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:30:46,842 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:30:46,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:30:46,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:30:46,842 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:30:46,842 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:30:46,842 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:30:46,842 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:30:46,950 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:30:46,951 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:30:47,578 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:30:47,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:30:47,585 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-12-28 02:30:47,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:30:47 BoogieIcfgContainer [2021-12-28 02:30:47,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:30:47,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:30:47,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:30:47,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:30:47,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:30:46" (1/3) ... [2021-12-28 02:30:47,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a816ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:30:47, skipping insertion in model container [2021-12-28 02:30:47,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:46" (2/3) ... [2021-12-28 02:30:47,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a816ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:30:47, skipping insertion in model container [2021-12-28 02:30:47,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:30:47" (3/3) ... [2021-12-28 02:30:47,593 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-1.c [2021-12-28 02:30:47,596 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:30:47,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:30:47,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:30:47,644 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 02:30:47,644 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:30:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 391 states have (on average 1.649616368286445) internal successors, (645), 398 states have internal predecessors, (645), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-28 02:30:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 02:30:47,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:47,676 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 02:30:47,677 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:47,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1248240687, now seen corresponding path program 1 times [2021-12-28 02:30:47,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:47,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832672166] [2021-12-28 02:30:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:47,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:47,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:47,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 02:30:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:47,933 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 02:30:47,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:47,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832672166] [2021-12-28 02:30:47,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832672166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:47,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:47,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:47,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470912633] [2021-12-28 02:30:47,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:47,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:47,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:47,964 INFO L87 Difference]: Start difference. First operand has 437 states, 391 states have (on average 1.649616368286445) internal successors, (645), 398 states have internal predecessors, (645), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) 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 02:30:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:48,253 INFO L93 Difference]: Finished difference Result 919 states and 1492 transitions. [2021-12-28 02:30:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:48,255 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 02:30:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:48,264 INFO L225 Difference]: With dead ends: 919 [2021-12-28 02:30:48,265 INFO L226 Difference]: Without dead ends: 496 [2021-12-28 02:30:48,269 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 02:30:48,271 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 897 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:48,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1082 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:30:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-28 02:30:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 490. [2021-12-28 02:30:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 440 states have (on average 1.5318181818181817) internal successors, (674), 445 states have internal predecessors, (674), 37 states have call successors, (37), 12 states have call predecessors, (37), 11 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2021-12-28 02:30:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 750 transitions. [2021-12-28 02:30:48,322 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 750 transitions. Word has length 44 [2021-12-28 02:30:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:48,322 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 750 transitions. [2021-12-28 02:30:48,323 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 02:30:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 750 transitions. [2021-12-28 02:30:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 02:30:48,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:48,325 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 02:30:48,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:30:48,326 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1131267963, now seen corresponding path program 1 times [2021-12-28 02:30:48,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363324865] [2021-12-28 02:30:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:48,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:48,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:48,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 02:30:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:48,377 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 02:30:48,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363324865] [2021-12-28 02:30:48,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363324865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:48,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:48,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:48,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622386868] [2021-12-28 02:30:48,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:48,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:48,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:48,387 INFO L87 Difference]: Start difference. First operand 490 states and 750 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 02:30:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:48,822 INFO L93 Difference]: Finished difference Result 738 states and 1090 transitions. [2021-12-28 02:30:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:48,823 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 02:30:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:48,826 INFO L225 Difference]: With dead ends: 738 [2021-12-28 02:30:48,826 INFO L226 Difference]: Without dead ends: 614 [2021-12-28 02:30:48,827 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 02:30:48,828 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 349 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:48,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 1400 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:30:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-28 02:30:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 557. [2021-12-28 02:30:48,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 501 states have (on average 1.5129740518962076) internal successors, (758), 506 states have internal predecessors, (758), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2021-12-28 02:30:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 840 transitions. [2021-12-28 02:30:48,852 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 840 transitions. Word has length 45 [2021-12-28 02:30:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:48,853 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 840 transitions. [2021-12-28 02:30:48,853 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 02:30:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 840 transitions. [2021-12-28 02:30:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 02:30:48,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:48,858 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 02:30:48,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:30:48,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:48,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1879341872, now seen corresponding path program 1 times [2021-12-28 02:30:48,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:48,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957654804] [2021-12-28 02:30:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:48,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:48,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:48,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 02:30:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:48,928 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 02:30:48,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:48,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957654804] [2021-12-28 02:30:48,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957654804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:48,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:48,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:48,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206034340] [2021-12-28 02:30:48,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:48,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:48,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:48,931 INFO L87 Difference]: Start difference. First operand 557 states and 840 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 02:30:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:49,086 INFO L93 Difference]: Finished difference Result 965 states and 1399 transitions. [2021-12-28 02:30:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:49,086 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 02:30:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:49,089 INFO L225 Difference]: With dead ends: 965 [2021-12-28 02:30:49,090 INFO L226 Difference]: Without dead ends: 774 [2021-12-28 02:30:49,090 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 02:30:49,091 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 906 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:49,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 1083 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-12-28 02:30:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 722. [2021-12-28 02:30:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 647 states have (on average 1.465224111282844) internal successors, (948), 655 states have internal predecessors, (948), 51 states have call successors, (51), 22 states have call predecessors, (51), 22 states have return successors, (59), 45 states have call predecessors, (59), 47 states have call successors, (59) [2021-12-28 02:30:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1058 transitions. [2021-12-28 02:30:49,111 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1058 transitions. Word has length 45 [2021-12-28 02:30:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:49,112 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1058 transitions. [2021-12-28 02:30:49,112 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 02:30:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1058 transitions. [2021-12-28 02:30:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-28 02:30:49,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:49,114 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 02:30:49,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:30:49,114 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2075143713, now seen corresponding path program 1 times [2021-12-28 02:30:49,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:49,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755255563] [2021-12-28 02:30:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:49,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 02:30:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:30:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,162 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 02:30:49,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:49,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755255563] [2021-12-28 02:30:49,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755255563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:49,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:49,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:49,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439676744] [2021-12-28 02:30:49,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:49,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:49,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:49,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:49,165 INFO L87 Difference]: Start difference. First operand 722 states and 1058 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 02:30:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:49,509 INFO L93 Difference]: Finished difference Result 1306 states and 1843 transitions. [2021-12-28 02:30:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:49,510 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 02:30:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:49,513 INFO L225 Difference]: With dead ends: 1306 [2021-12-28 02:30:49,514 INFO L226 Difference]: Without dead ends: 950 [2021-12-28 02:30:49,515 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 02:30:49,515 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 333 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:49,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 1455 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:30:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-12-28 02:30:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 912. [2021-12-28 02:30:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 813 states have (on average 1.4120541205412054) internal successors, (1148), 823 states have internal predecessors, (1148), 65 states have call successors, (65), 30 states have call predecessors, (65), 32 states have return successors, (83), 59 states have call predecessors, (83), 61 states have call successors, (83) [2021-12-28 02:30:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1296 transitions. [2021-12-28 02:30:49,554 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1296 transitions. Word has length 62 [2021-12-28 02:30:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:49,555 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1296 transitions. [2021-12-28 02:30:49,556 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 02:30:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1296 transitions. [2021-12-28 02:30:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 02:30:49,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:49,558 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 02:30:49,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:30:49,560 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:49,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1252852542, now seen corresponding path program 1 times [2021-12-28 02:30:49,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:49,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235963059] [2021-12-28 02:30:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:49,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:30:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:30:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,664 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 02:30:49,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:49,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235963059] [2021-12-28 02:30:49,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235963059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:49,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:49,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:49,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063798081] [2021-12-28 02:30:49,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:49,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:49,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:49,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:49,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:49,669 INFO L87 Difference]: Start difference. First operand 912 states and 1296 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 02:30:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:49,812 INFO L93 Difference]: Finished difference Result 1565 states and 2149 transitions. [2021-12-28 02:30:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:49,813 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 02:30:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:49,817 INFO L225 Difference]: With dead ends: 1565 [2021-12-28 02:30:49,818 INFO L226 Difference]: Without dead ends: 1111 [2021-12-28 02:30:49,819 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 02:30:49,820 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 893 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:49,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1080 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-12-28 02:30:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1056. [2021-12-28 02:30:49,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 941 states have (on average 1.3804463336875665) internal successors, (1299), 953 states have internal predecessors, (1299), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (97), 67 states have call predecessors, (97), 69 states have call successors, (97) [2021-12-28 02:30:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1469 transitions. [2021-12-28 02:30:49,852 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1469 transitions. Word has length 67 [2021-12-28 02:30:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:49,852 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1469 transitions. [2021-12-28 02:30:49,853 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 02:30:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1469 transitions. [2021-12-28 02:30:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:30:49,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:49,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:30:49,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:30:49,855 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:49,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1281985013, now seen corresponding path program 1 times [2021-12-28 02:30:49,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:49,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481597894] [2021-12-28 02:30:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:49,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:30:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-28 02:30:49,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481597894] [2021-12-28 02:30:49,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481597894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:49,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261440772] [2021-12-28 02:30:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:49,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:49,925 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 02:30:49,932 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 02:30:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:50,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:30:50,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:30:50,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:30:50,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261440772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:50,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:30:50,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-28 02:30:50,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581574174] [2021-12-28 02:30:50,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:50,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:30:50,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:30:50,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:50,151 INFO L87 Difference]: Start difference. First operand 1056 states and 1469 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 02:30:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:50,209 INFO L93 Difference]: Finished difference Result 1599 states and 2192 transitions. [2021-12-28 02:30:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:30:50,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2021-12-28 02:30:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:50,213 INFO L225 Difference]: With dead ends: 1599 [2021-12-28 02:30:50,213 INFO L226 Difference]: Without dead ends: 1054 [2021-12-28 02:30:50,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:50,215 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 72 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:50,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1340 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:30:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-12-28 02:30:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1010. [2021-12-28 02:30:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 901 states have (on average 1.3695893451720311) internal successors, (1234), 913 states have internal predecessors, (1234), 69 states have call successors, (69), 34 states have call predecessors, (69), 38 states have return successors, (91), 63 states have call predecessors, (91), 65 states have call successors, (91) [2021-12-28 02:30:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1394 transitions. [2021-12-28 02:30:50,252 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1394 transitions. Word has length 68 [2021-12-28 02:30:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:50,252 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1394 transitions. [2021-12-28 02:30:50,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 02:30:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1394 transitions. [2021-12-28 02:30:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:30:50,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:50,254 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 02:30:50,277 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 02:30:50,470 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 02:30:50,471 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash 897986762, now seen corresponding path program 1 times [2021-12-28 02:30:50,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:50,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912137137] [2021-12-28 02:30:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:50,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:50,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:50,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:50,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:30:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:50,540 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 02:30:50,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:50,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912137137] [2021-12-28 02:30:50,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912137137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431350496] [2021-12-28 02:30:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:50,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:50,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:50,543 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 02:30:50,544 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 02:30:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:50,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 02:30:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:50,776 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 02:30:50,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:30:50,866 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 02:30:50,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431350496] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:50,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:30:50,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-28 02:30:50,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063869166] [2021-12-28 02:30:50,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:50,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:50,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:50,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:50,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:30:50,868 INFO L87 Difference]: Start difference. First operand 1010 states and 1394 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 02:30:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:50,985 INFO L93 Difference]: Finished difference Result 1062 states and 1456 transitions. [2021-12-28 02:30:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 02:30:50,986 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 02:30:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:50,990 INFO L225 Difference]: With dead ends: 1062 [2021-12-28 02:30:50,990 INFO L226 Difference]: Without dead ends: 1059 [2021-12-28 02:30:50,992 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 02:30:50,993 INFO L933 BasicCegarLoop]: 681 mSDtfsCounter, 1197 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:50,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1197 Valid, 746 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-12-28 02:30:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1009. [2021-12-28 02:30:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 901 states have (on average 1.367369589345172) internal successors, (1232), 912 states have internal predecessors, (1232), 68 states have call successors, (68), 34 states have call predecessors, (68), 38 states have return successors, (91), 63 states have call predecessors, (91), 65 states have call successors, (91) [2021-12-28 02:30:51,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1391 transitions. [2021-12-28 02:30:51,034 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1391 transitions. Word has length 68 [2021-12-28 02:30:51,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:51,036 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1391 transitions. [2021-12-28 02:30:51,036 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 02:30:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1391 transitions. [2021-12-28 02:30:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:30:51,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:51,043 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 02:30:51,080 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 02:30:51,243 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 02:30:51,244 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2066438309, now seen corresponding path program 1 times [2021-12-28 02:30:51,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:51,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501736081] [2021-12-28 02:30:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:51,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:51,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:51,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:51,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:30:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:51,296 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 02:30:51,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501736081] [2021-12-28 02:30:51,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501736081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260166236] [2021-12-28 02:30:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:51,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:51,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:51,307 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 02:30:51,308 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 02:30:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:51,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:30:51,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:51,657 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 02:30:51,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:30:51,780 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 02:30:51,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260166236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:30:51,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:30:51,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-28 02:30:51,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446790180] [2021-12-28 02:30:51,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:30:51,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 02:30:51,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 02:30:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:30:51,783 INFO L87 Difference]: Start difference. First operand 1009 states and 1391 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 02:30:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:52,995 INFO L93 Difference]: Finished difference Result 2519 states and 3329 transitions. [2021-12-28 02:30:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-28 02:30:52,996 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 02:30:52,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:53,002 INFO L225 Difference]: With dead ends: 2519 [2021-12-28 02:30:53,003 INFO L226 Difference]: Without dead ends: 2023 [2021-12-28 02:30:53,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-28 02:30:53,005 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 1813 mSDsluCounter, 2786 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:53,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1845 Valid, 3568 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1823 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:30:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-12-28 02:30:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1388. [2021-12-28 02:30:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1241 states have (on average 1.3247381144238517) internal successors, (1644), 1260 states have internal predecessors, (1644), 88 states have call successors, (88), 48 states have call predecessors, (88), 57 states have return successors, (125), 80 states have call predecessors, (125), 85 states have call successors, (125) [2021-12-28 02:30:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1857 transitions. [2021-12-28 02:30:53,057 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1857 transitions. Word has length 69 [2021-12-28 02:30:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:53,057 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 1857 transitions. [2021-12-28 02:30:53,057 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 02:30:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1857 transitions. [2021-12-28 02:30:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-28 02:30:53,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:53,060 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 02:30:53,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-28 02:30:53,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:53,278 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1048564289, now seen corresponding path program 1 times [2021-12-28 02:30:53,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:53,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360255639] [2021-12-28 02:30:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:53,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:30:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 02:30:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 02:30:53,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360255639] [2021-12-28 02:30:53,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360255639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:53,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282382811] [2021-12-28 02:30:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:53,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:53,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:53,354 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:30:53,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 02:30:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:30:53,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 02:30:53,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:30:53,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282382811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:53,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:30:53,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-28 02:30:53,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258823728] [2021-12-28 02:30:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:53,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:30:53,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:30:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:53,548 INFO L87 Difference]: Start difference. First operand 1388 states and 1857 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 02:30:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:53,592 INFO L93 Difference]: Finished difference Result 2079 states and 2732 transitions. [2021-12-28 02:30:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:30:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-28 02:30:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:53,597 INFO L225 Difference]: With dead ends: 2079 [2021-12-28 02:30:53,598 INFO L226 Difference]: Without dead ends: 1310 [2021-12-28 02:30:53,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:53,601 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 617 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:53,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 761 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:30:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-12-28 02:30:53,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1301. [2021-12-28 02:30:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1164 states have (on average 1.3230240549828178) internal successors, (1540), 1182 states have internal predecessors, (1540), 84 states have call successors, (84), 44 states have call predecessors, (84), 51 states have return successors, (117), 75 states have call predecessors, (117), 81 states have call successors, (117) [2021-12-28 02:30:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1741 transitions. [2021-12-28 02:30:53,645 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1741 transitions. Word has length 88 [2021-12-28 02:30:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:53,646 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 1741 transitions. [2021-12-28 02:30:53,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 02:30:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1741 transitions. [2021-12-28 02:30:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 02:30:53,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:53,650 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 02:30:53,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 02:30:53,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:53,863 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:53,864 INFO L85 PathProgramCache]: Analyzing trace with hash -55924099, now seen corresponding path program 1 times [2021-12-28 02:30:53,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:53,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769276106] [2021-12-28 02:30:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:53,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 02:30:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 02:30:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:30:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 02:30:53,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:53,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769276106] [2021-12-28 02:30:53,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769276106] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:53,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613053465] [2021-12-28 02:30:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:53,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:53,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:53,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:30:53,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 02:30:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:54,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:30:54,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:54,141 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 02:30:54,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:30:54,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613053465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:54,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:30:54,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-28 02:30:54,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736736447] [2021-12-28 02:30:54,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:54,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:30:54,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:54,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:30:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:54,143 INFO L87 Difference]: Start difference. First operand 1301 states and 1741 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 02:30:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:54,182 INFO L93 Difference]: Finished difference Result 1678 states and 2202 transitions. [2021-12-28 02:30:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:30:54,183 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 02:30:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:54,185 INFO L225 Difference]: With dead ends: 1678 [2021-12-28 02:30:54,185 INFO L226 Difference]: Without dead ends: 360 [2021-12-28 02:30:54,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:54,187 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 61 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1335 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 02:30:54,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1335 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:30:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-28 02:30:54,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-12-28 02:30:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5797546012269938) internal successors, (515), 328 states have internal predecessors, (515), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-28 02:30:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 567 transitions. [2021-12-28 02:30:54,198 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 567 transitions. Word has length 103 [2021-12-28 02:30:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:54,198 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 567 transitions. [2021-12-28 02:30:54,199 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 02:30:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 567 transitions. [2021-12-28 02:30:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:30:54,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:54,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:54,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 02:30:54,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 02:30:54,416 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1801318745, now seen corresponding path program 1 times [2021-12-28 02:30:54,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137119084] [2021-12-28 02:30:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:54,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:54,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:54,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:30:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:30:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:54,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:30:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:54,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:30:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:54,507 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 02:30:54,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:54,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137119084] [2021-12-28 02:30:54,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137119084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:54,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:54,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:30:54,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124644566] [2021-12-28 02:30:54,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:54,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:30:54,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:30:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:54,509 INFO L87 Difference]: Start difference. First operand 360 states and 567 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 02:30:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:55,465 INFO L93 Difference]: Finished difference Result 841 states and 1345 transitions. [2021-12-28 02:30:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:30:55,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 168 [2021-12-28 02:30:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:55,468 INFO L225 Difference]: With dead ends: 841 [2021-12-28 02:30:55,468 INFO L226 Difference]: Without dead ends: 491 [2021-12-28 02:30:55,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:30:55,470 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 966 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:55,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 1007 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:30:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-28 02:30:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 360. [2021-12-28 02:30:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5766871165644172) internal successors, (514), 328 states have internal predecessors, (514), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-28 02:30:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 566 transitions. [2021-12-28 02:30:55,485 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 566 transitions. Word has length 168 [2021-12-28 02:30:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:55,486 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 566 transitions. [2021-12-28 02:30:55,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 02:30:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 566 transitions. [2021-12-28 02:30:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:30:55,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:55,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:55,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:30:55,488 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:55,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2146146907, now seen corresponding path program 1 times [2021-12-28 02:30:55,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:55,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266913231] [2021-12-28 02:30:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:55,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:55,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:55,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:30:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:55,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:30:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:55,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:30:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:55,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:30:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:55,591 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 02:30:55,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:55,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266913231] [2021-12-28 02:30:55,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266913231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:55,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:55,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:30:55,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047336556] [2021-12-28 02:30:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:55,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:30:55,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:30:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:55,593 INFO L87 Difference]: Start difference. First operand 360 states and 566 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 02:30:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:56,585 INFO L93 Difference]: Finished difference Result 833 states and 1328 transitions. [2021-12-28 02:30:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:30:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 168 [2021-12-28 02:30:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:56,588 INFO L225 Difference]: With dead ends: 833 [2021-12-28 02:30:56,588 INFO L226 Difference]: Without dead ends: 491 [2021-12-28 02:30:56,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:30:56,589 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 957 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:56,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 1005 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:30:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-28 02:30:56,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 360. [2021-12-28 02:30:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 326 states have (on average 1.5736196319018405) internal successors, (513), 328 states have internal predecessors, (513), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-28 02:30:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 565 transitions. [2021-12-28 02:30:56,605 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 565 transitions. Word has length 168 [2021-12-28 02:30:56,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:56,605 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 565 transitions. [2021-12-28 02:30:56,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 02:30:56,606 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 565 transitions. [2021-12-28 02:30:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:30:56,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:56,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:56,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:30:56,607 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:56,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:56,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1762957987, now seen corresponding path program 1 times [2021-12-28 02:30:56,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:56,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862279286] [2021-12-28 02:30:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:56,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:56,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:56,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:30:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:56,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:30:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:56,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:30:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:56,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:30:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:56,711 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 02:30:56,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:56,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862279286] [2021-12-28 02:30:56,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862279286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:56,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:56,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:30:56,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61552605] [2021-12-28 02:30:56,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:56,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:30:56,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:56,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:30:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:30:56,713 INFO L87 Difference]: Start difference. First operand 360 states and 565 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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 02:30:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:58,715 INFO L93 Difference]: Finished difference Result 1318 states and 2116 transitions. [2021-12-28 02:30:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:30:58,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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 168 [2021-12-28 02:30:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:58,719 INFO L225 Difference]: With dead ends: 1318 [2021-12-28 02:30:58,719 INFO L226 Difference]: Without dead ends: 978 [2021-12-28 02:30:58,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:30:58,720 INFO L933 BasicCegarLoop]: 668 mSDtfsCounter, 1456 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:58,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1474 Valid, 1588 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1869 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-28 02:30:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-12-28 02:30:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 715. [2021-12-28 02:30:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 654 states have (on average 1.5871559633027523) internal successors, (1038), 657 states have internal predecessors, (1038), 47 states have call successors, (47), 13 states have call predecessors, (47), 13 states have return successors, (48), 45 states have call predecessors, (48), 45 states have call successors, (48) [2021-12-28 02:30:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1133 transitions. [2021-12-28 02:30:58,751 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1133 transitions. Word has length 168 [2021-12-28 02:30:58,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:58,751 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1133 transitions. [2021-12-28 02:30:58,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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 02:30:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1133 transitions. [2021-12-28 02:30:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:30:58,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:58,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:58,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:30:58,753 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:58,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1609608801, now seen corresponding path program 1 times [2021-12-28 02:30:58,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:58,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406880975] [2021-12-28 02:30:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:58,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:58,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:58,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:30:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:58,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:30:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:58,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:30:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:58,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:30:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:58,876 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 02:30:58,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:58,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406880975] [2021-12-28 02:30:58,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406880975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:58,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:58,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:58,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368225053] [2021-12-28 02:30:58,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:58,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:58,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:58,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:58,879 INFO L87 Difference]: Start difference. First operand 715 states and 1133 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:01,535 INFO L93 Difference]: Finished difference Result 2178 states and 3507 transitions. [2021-12-28 02:31:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:01,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:01,551 INFO L225 Difference]: With dead ends: 2178 [2021-12-28 02:31:01,551 INFO L226 Difference]: Without dead ends: 1483 [2021-12-28 02:31:01,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:31:01,553 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 1483 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:01,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1501 Valid, 2783 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-28 02:31:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-12-28 02:31:01,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1046. [2021-12-28 02:31:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.581419624217119) internal successors, (1515), 962 states have internal predecessors, (1515), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-28 02:31:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1652 transitions. [2021-12-28 02:31:01,607 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1652 transitions. Word has length 168 [2021-12-28 02:31:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:01,607 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1652 transitions. [2021-12-28 02:31:01,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1652 transitions. [2021-12-28 02:31:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:01,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:01,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:01,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:31:01,609 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1271321251, now seen corresponding path program 1 times [2021-12-28 02:31:01,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:01,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027416522] [2021-12-28 02:31:01,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:01,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:01,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:01,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:01,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:01,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:01,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:01,710 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 02:31:01,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:01,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027416522] [2021-12-28 02:31:01,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027416522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:01,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:01,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:01,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479291649] [2021-12-28 02:31:01,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:01,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:01,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:01,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:01,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:01,712 INFO L87 Difference]: Start difference. First operand 1046 states and 1652 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:03,023 INFO L93 Difference]: Finished difference Result 2523 states and 4060 transitions. [2021-12-28 02:31:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:03,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:03,032 INFO L225 Difference]: With dead ends: 2523 [2021-12-28 02:31:03,032 INFO L226 Difference]: Without dead ends: 1497 [2021-12-28 02:31:03,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:03,034 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 1050 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:03,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 1513 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:31:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-12-28 02:31:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1046. [2021-12-28 02:31:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.5782881002087683) internal successors, (1512), 962 states have internal predecessors, (1512), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-28 02:31:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1649 transitions. [2021-12-28 02:31:03,091 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1649 transitions. Word has length 168 [2021-12-28 02:31:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:03,091 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1649 transitions. [2021-12-28 02:31:03,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1649 transitions. [2021-12-28 02:31:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:03,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:03,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:03,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:31:03,093 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash -844766753, now seen corresponding path program 1 times [2021-12-28 02:31:03,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:03,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361181695] [2021-12-28 02:31:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:03,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:03,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:03,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:03,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:03,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:03,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:03,224 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 02:31:03,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:03,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361181695] [2021-12-28 02:31:03,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361181695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:03,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:03,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:03,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142933268] [2021-12-28 02:31:03,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:03,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:03,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:03,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:03,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:03,227 INFO L87 Difference]: Start difference. First operand 1046 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:04,290 INFO L93 Difference]: Finished difference Result 2519 states and 4043 transitions. [2021-12-28 02:31:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:04,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:04,301 INFO L225 Difference]: With dead ends: 2519 [2021-12-28 02:31:04,301 INFO L226 Difference]: Without dead ends: 1493 [2021-12-28 02:31:04,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:04,305 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 1281 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:04,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 1279 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:31:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-12-28 02:31:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1046. [2021-12-28 02:31:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 958 states have (on average 1.5751565762004176) internal successors, (1509), 962 states have internal predecessors, (1509), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-28 02:31:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1646 transitions. [2021-12-28 02:31:04,366 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1646 transitions. Word has length 168 [2021-12-28 02:31:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1646 transitions. [2021-12-28 02:31:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1646 transitions. [2021-12-28 02:31:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:04,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:04,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:04,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:31:04,368 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:04,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1385196259, now seen corresponding path program 1 times [2021-12-28 02:31:04,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:04,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100215519] [2021-12-28 02:31:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:04,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:04,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:04,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:04,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:04,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:04,470 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 02:31:04,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:04,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100215519] [2021-12-28 02:31:04,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100215519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:04,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:04,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:04,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379357272] [2021-12-28 02:31:04,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:04,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:04,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:04,472 INFO L87 Difference]: Start difference. First operand 1046 states and 1646 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:06,939 INFO L93 Difference]: Finished difference Result 3436 states and 5490 transitions. [2021-12-28 02:31:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:06,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:06,948 INFO L225 Difference]: With dead ends: 3436 [2021-12-28 02:31:06,948 INFO L226 Difference]: Without dead ends: 2410 [2021-12-28 02:31:06,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:31:06,951 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 1465 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 2857 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:06,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1483 Valid, 2764 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2857 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-28 02:31:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-12-28 02:31:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1717. [2021-12-28 02:31:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1575 states have (on average 1.5695238095238095) internal successors, (2472), 1581 states have internal predecessors, (2472), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2021-12-28 02:31:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2697 transitions. [2021-12-28 02:31:07,077 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2697 transitions. Word has length 168 [2021-12-28 02:31:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:07,077 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 2697 transitions. [2021-12-28 02:31:07,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:07,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2697 transitions. [2021-12-28 02:31:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:07,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:07,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:07,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:31:07,080 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:07,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1541176801, now seen corresponding path program 1 times [2021-12-28 02:31:07,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:07,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919748894] [2021-12-28 02:31:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:07,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:07,182 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 02:31:07,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:07,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919748894] [2021-12-28 02:31:07,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919748894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:07,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:07,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:07,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901300522] [2021-12-28 02:31:07,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:07,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:07,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:07,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:07,185 INFO L87 Difference]: Start difference. First operand 1717 states and 2697 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:08,498 INFO L93 Difference]: Finished difference Result 4093 states and 6528 transitions. [2021-12-28 02:31:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:08,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:08,506 INFO L225 Difference]: With dead ends: 4093 [2021-12-28 02:31:08,506 INFO L226 Difference]: Without dead ends: 2396 [2021-12-28 02:31:08,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:08,510 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 1047 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:08,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 1502 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:31:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-12-28 02:31:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1717. [2021-12-28 02:31:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1575 states have (on average 1.5663492063492064) internal successors, (2467), 1581 states have internal predecessors, (2467), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2021-12-28 02:31:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2692 transitions. [2021-12-28 02:31:08,623 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2692 transitions. Word has length 168 [2021-12-28 02:31:08,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:08,623 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 2692 transitions. [2021-12-28 02:31:08,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:08,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2692 transitions. [2021-12-28 02:31:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:08,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:08,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:08,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:31:08,625 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:08,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1130566435, now seen corresponding path program 1 times [2021-12-28 02:31:08,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:08,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979276972] [2021-12-28 02:31:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:08,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:08,720 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 02:31:08,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:08,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979276972] [2021-12-28 02:31:08,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979276972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:08,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:08,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:08,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268053806] [2021-12-28 02:31:08,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:08,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:08,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:08,723 INFO L87 Difference]: Start difference. First operand 1717 states and 2692 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:11,314 INFO L93 Difference]: Finished difference Result 5875 states and 9325 transitions. [2021-12-28 02:31:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:31:11,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:11,327 INFO L225 Difference]: With dead ends: 5875 [2021-12-28 02:31:11,328 INFO L226 Difference]: Without dead ends: 4178 [2021-12-28 02:31:11,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:31:11,332 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 1457 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 2753 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:11,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1475 Valid, 2753 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2830 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-28 02:31:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-12-28 02:31:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3063. [2021-12-28 02:31:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.560966939210807) internal successors, (4391), 2823 states have internal predecessors, (4391), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-28 02:31:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4798 transitions. [2021-12-28 02:31:11,566 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4798 transitions. Word has length 168 [2021-12-28 02:31:11,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:11,567 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4798 transitions. [2021-12-28 02:31:11,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4798 transitions. [2021-12-28 02:31:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:11,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:11,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:11,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:31:11,570 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:11,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1376531039, now seen corresponding path program 1 times [2021-12-28 02:31:11,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:11,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173508064] [2021-12-28 02:31:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:11,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:31:11,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:11,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173508064] [2021-12-28 02:31:11,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173508064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:11,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:11,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:11,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435236713] [2021-12-28 02:31:11,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:11,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:11,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:11,668 INFO L87 Difference]: Start difference. First operand 3063 states and 4798 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:12,985 INFO L93 Difference]: Finished difference Result 7237 states and 11491 transitions. [2021-12-28 02:31:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:12,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:12,997 INFO L225 Difference]: With dead ends: 7237 [2021-12-28 02:31:12,997 INFO L226 Difference]: Without dead ends: 4194 [2021-12-28 02:31:13,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:13,004 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1204 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:13,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 1303 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:31:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-12-28 02:31:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3063. [2021-12-28 02:31:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.557767507998578) internal successors, (4382), 2823 states have internal predecessors, (4382), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-28 02:31:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4789 transitions. [2021-12-28 02:31:13,227 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4789 transitions. Word has length 168 [2021-12-28 02:31:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:13,228 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4789 transitions. [2021-12-28 02:31:13,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4789 transitions. [2021-12-28 02:31:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:13,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:13,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:13,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:31:13,230 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash -759352163, now seen corresponding path program 1 times [2021-12-28 02:31:13,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:13,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607813457] [2021-12-28 02:31:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:13,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:13,330 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 02:31:13,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:13,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607813457] [2021-12-28 02:31:13,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607813457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:13,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:13,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:13,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249562408] [2021-12-28 02:31:13,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:13,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:13,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:13,332 INFO L87 Difference]: Start difference. First operand 3063 states and 4789 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:14,802 INFO L93 Difference]: Finished difference Result 7217 states and 11424 transitions. [2021-12-28 02:31:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:14,813 INFO L225 Difference]: With dead ends: 7217 [2021-12-28 02:31:14,813 INFO L226 Difference]: Without dead ends: 4174 [2021-12-28 02:31:14,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:14,824 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 1045 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:14,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 1487 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:31:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4174 states. [2021-12-28 02:31:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4174 to 3063. [2021-12-28 02:31:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.554568076786349) internal successors, (4373), 2823 states have internal predecessors, (4373), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-28 02:31:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4780 transitions. [2021-12-28 02:31:15,067 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4780 transitions. Word has length 168 [2021-12-28 02:31:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:15,068 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4780 transitions. [2021-12-28 02:31:15,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4780 transitions. [2021-12-28 02:31:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:15,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:15,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:15,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 02:31:15,071 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash -341463461, now seen corresponding path program 1 times [2021-12-28 02:31:15,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551804249] [2021-12-28 02:31:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:15,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:15,169 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 02:31:15,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:15,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551804249] [2021-12-28 02:31:15,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551804249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:15,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:15,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:15,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485901645] [2021-12-28 02:31:15,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:15,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:15,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:15,172 INFO L87 Difference]: Start difference. First operand 3063 states and 4780 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:16,619 INFO L93 Difference]: Finished difference Result 7207 states and 11377 transitions. [2021-12-28 02:31:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:16,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:16,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:16,628 INFO L225 Difference]: With dead ends: 7207 [2021-12-28 02:31:16,628 INFO L226 Difference]: Without dead ends: 4164 [2021-12-28 02:31:16,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:16,632 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1043 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:16,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 1483 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:31:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-12-28 02:31:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 3063. [2021-12-28 02:31:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.5513686455741202) internal successors, (4364), 2823 states have internal predecessors, (4364), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-28 02:31:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4771 transitions. [2021-12-28 02:31:16,856 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4771 transitions. Word has length 168 [2021-12-28 02:31:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:16,857 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4771 transitions. [2021-12-28 02:31:16,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:16,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4771 transitions. [2021-12-28 02:31:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:16,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:16,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:16,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 02:31:16,859 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:16,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:16,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1057490141, now seen corresponding path program 1 times [2021-12-28 02:31:16,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:16,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857419310] [2021-12-28 02:31:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:16,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:16,951 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 02:31:16,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:16,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857419310] [2021-12-28 02:31:16,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857419310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:16,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:16,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:16,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523628588] [2021-12-28 02:31:16,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:16,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:16,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:16,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:16,953 INFO L87 Difference]: Start difference. First operand 3063 states and 4771 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:18,441 INFO L93 Difference]: Finished difference Result 7197 states and 11330 transitions. [2021-12-28 02:31:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:18,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:18,455 INFO L225 Difference]: With dead ends: 7197 [2021-12-28 02:31:18,455 INFO L226 Difference]: Without dead ends: 4154 [2021-12-28 02:31:18,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:18,464 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 1085 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:18,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 1453 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:31:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2021-12-28 02:31:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3063. [2021-12-28 02:31:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 2813 states have (on average 1.5481692143618913) internal successors, (4355), 2823 states have internal predecessors, (4355), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-28 02:31:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4762 transitions. [2021-12-28 02:31:18,706 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4762 transitions. Word has length 168 [2021-12-28 02:31:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:18,707 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4762 transitions. [2021-12-28 02:31:18,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4762 transitions. [2021-12-28 02:31:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:18,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:18,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:18,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 02:31:18,709 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:18,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash -559950309, now seen corresponding path program 1 times [2021-12-28 02:31:18,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:18,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180807542] [2021-12-28 02:31:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:18,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:18,811 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 02:31:18,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:18,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180807542] [2021-12-28 02:31:18,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180807542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:18,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:18,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:18,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882270177] [2021-12-28 02:31:18,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:18,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:18,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:18,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:18,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:18,812 INFO L87 Difference]: Start difference. First operand 3063 states and 4762 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:22,537 INFO L93 Difference]: Finished difference Result 11921 states and 18647 transitions. [2021-12-28 02:31:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:31:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:22,557 INFO L225 Difference]: With dead ends: 11921 [2021-12-28 02:31:22,557 INFO L226 Difference]: Without dead ends: 8878 [2021-12-28 02:31:22,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:22,565 INFO L933 BasicCegarLoop]: 1059 mSDtfsCounter, 1529 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 3229 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 3320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:22,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 2876 Invalid, 3320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3229 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-28 02:31:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8878 states. [2021-12-28 02:31:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8878 to 5701. [2021-12-28 02:31:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 5243 states have (on average 1.5401487697882892) internal successors, (8075), 5261 states have internal predecessors, (8075), 339 states have call successors, (339), 103 states have call predecessors, (339), 118 states have return successors, (434), 352 states have call predecessors, (434), 337 states have call successors, (434) [2021-12-28 02:31:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 8848 transitions. [2021-12-28 02:31:23,088 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 8848 transitions. Word has length 168 [2021-12-28 02:31:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:23,088 INFO L470 AbstractCegarLoop]: Abstraction has 5701 states and 8848 transitions. [2021-12-28 02:31:23,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 8848 transitions. [2021-12-28 02:31:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:23,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:23,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:23,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 02:31:23,092 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash -196483811, now seen corresponding path program 1 times [2021-12-28 02:31:23,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:23,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089557474] [2021-12-28 02:31:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:23,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:23,202 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 02:31:23,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:23,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089557474] [2021-12-28 02:31:23,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089557474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:23,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:23,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:23,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112673340] [2021-12-28 02:31:23,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:23,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:23,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:23,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:23,204 INFO L87 Difference]: Start difference. First operand 5701 states and 8848 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:27,857 INFO L93 Difference]: Finished difference Result 22389 states and 34987 transitions. [2021-12-28 02:31:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:31:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:27,894 INFO L225 Difference]: With dead ends: 22389 [2021-12-28 02:31:27,894 INFO L226 Difference]: Without dead ends: 16708 [2021-12-28 02:31:27,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:27,909 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 1795 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1825 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:27,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1825 Valid, 2703 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2718 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-28 02:31:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2021-12-28 02:31:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 11038. [2021-12-28 02:31:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 10172 states have (on average 1.5380456154148643) internal successors, (15645), 10206 states have internal predecessors, (15645), 635 states have call successors, (635), 199 states have call predecessors, (635), 230 states have return successors, (908), 664 states have call predecessors, (908), 633 states have call successors, (908) [2021-12-28 02:31:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 17188 transitions. [2021-12-28 02:31:29,086 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 17188 transitions. Word has length 168 [2021-12-28 02:31:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:29,086 INFO L470 AbstractCegarLoop]: Abstraction has 11038 states and 17188 transitions. [2021-12-28 02:31:29,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 17188 transitions. [2021-12-28 02:31:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:29,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:29,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:29,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 02:31:29,092 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:29,092 INFO L85 PathProgramCache]: Analyzing trace with hash 92335579, now seen corresponding path program 1 times [2021-12-28 02:31:29,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:29,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581778792] [2021-12-28 02:31:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:29,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:29,183 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 02:31:29,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:29,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581778792] [2021-12-28 02:31:29,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581778792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:29,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:29,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:29,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415112079] [2021-12-28 02:31:29,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:29,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:29,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:29,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:29,185 INFO L87 Difference]: Start difference. First operand 11038 states and 17188 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:36,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:36,655 INFO L93 Difference]: Finished difference Result 43244 states and 67809 transitions. [2021-12-28 02:31:36,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:31:36,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:31:36,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:36,739 INFO L225 Difference]: With dead ends: 43244 [2021-12-28 02:31:36,740 INFO L226 Difference]: Without dead ends: 32226 [2021-12-28 02:31:36,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:31:36,763 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 1508 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:36,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 2838 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3144 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-28 02:31:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32226 states. [2021-12-28 02:31:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32226 to 21695. [2021-12-28 02:31:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21695 states, 20029 states have (on average 1.5377203055569424) internal successors, (30799), 20095 states have internal predecessors, (30799), 1211 states have call successors, (1211), 391 states have call predecessors, (1211), 454 states have return successors, (2002), 1272 states have call predecessors, (2002), 1209 states have call successors, (2002) [2021-12-28 02:31:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21695 states to 21695 states and 34012 transitions. [2021-12-28 02:31:39,109 INFO L78 Accepts]: Start accepts. Automaton has 21695 states and 34012 transitions. Word has length 168 [2021-12-28 02:31:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:31:39,109 INFO L470 AbstractCegarLoop]: Abstraction has 21695 states and 34012 transitions. [2021-12-28 02:31:39,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 02:31:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 21695 states and 34012 transitions. [2021-12-28 02:31:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:31:39,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:31:39,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:39,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-28 02:31:39,183 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:31:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:31:39,183 INFO L85 PathProgramCache]: Analyzing trace with hash -452536995, now seen corresponding path program 1 times [2021-12-28 02:31:39,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:31:39,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998046048] [2021-12-28 02:31:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:31:39,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:31:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:31:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:31:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:31:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:31:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:31:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:31:39,280 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 02:31:39,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:31:39,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998046048] [2021-12-28 02:31:39,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998046048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:31:39,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:31:39,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:31:39,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168095497] [2021-12-28 02:31:39,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:31:39,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:31:39,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:31:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:31:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:31:39,283 INFO L87 Difference]: Start difference. First operand 21695 states and 34012 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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)