./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/systemc/token_ring.03.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 e96a4dadf08c19b3d92d901d7f9116f0323f4fb1660ac2537112df0afe321751 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:36:00,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:36:00,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:36:00,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:36:00,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:36:00,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:36:00,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:36:00,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:36:00,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:36:00,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:36:00,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:36:00,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:36:00,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:36:00,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:36:00,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:36:00,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:36:00,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:36:00,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:36:00,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:36:00,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:36:00,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:36:00,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:36:00,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:36:00,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:36:00,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:36:00,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:36:00,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:36:00,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:36:00,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:36:00,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:36:00,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:36:00,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:36:00,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:36:00,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:36:00,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:36:00,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:36:00,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:36:00,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:36:00,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:36:00,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:36:00,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:36:00,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:36:00,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:36:00,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:36:00,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:36:00,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:36:00,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:36:00,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:36:00,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:36:00,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:36:00,527 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:36:00,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:36:00,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:36:00,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:36:00,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:36:00,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:36:00,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:36:00,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:36:00,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:36:00,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:36:00,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:36:00,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:36:00,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:36:00,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:36:00,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:36:00,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:36:00,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:36:00,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:36:00,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:36:00,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:36:00,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:36:00,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:36:00,532 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:36:00,532 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:36:00,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:36:00,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:36:00,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96a4dadf08c19b3d92d901d7f9116f0323f4fb1660ac2537112df0afe321751 [2021-12-17 15:36:00,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:36:00,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:36:00,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:36:00,731 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:36:00,731 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:36:00,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2021-12-17 15:36:00,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db154a0b5/c2e640093f3747f0a70d1f22dc94c9da/FLAGc9176d93e [2021-12-17 15:36:01,157 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:36:01,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2021-12-17 15:36:01,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db154a0b5/c2e640093f3747f0a70d1f22dc94c9da/FLAGc9176d93e [2021-12-17 15:36:01,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db154a0b5/c2e640093f3747f0a70d1f22dc94c9da [2021-12-17 15:36:01,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:36:01,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:36:01,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:36:01,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:36:01,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:36:01,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e90d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01, skipping insertion in model container [2021-12-17 15:36:01,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:36:01,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:36:01,340 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/systemc/token_ring.03.cil-1.c[671,684] [2021-12-17 15:36:01,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:36:01,379 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:36:01,385 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/systemc/token_ring.03.cil-1.c[671,684] [2021-12-17 15:36:01,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:36:01,420 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:36:01,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01 WrapperNode [2021-12-17 15:36:01,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:36:01,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:36:01,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:36:01,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:36:01,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,454 INFO L137 Inliner]: procedures = 34, calls = 41, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 336 [2021-12-17 15:36:01,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:36:01,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:36:01,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:36:01,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:36:01,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:36:01,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:36:01,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:36:01,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:36:01,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (1/1) ... [2021-12-17 15:36:01,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:36:01,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:36:01,533 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) [2021-12-17 15:36:01,535 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 [2021-12-17 15:36:01,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:36:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-17 15:36:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-17 15:36:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 15:36:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 15:36:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 15:36:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 15:36:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 15:36:01,563 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 15:36:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 15:36:01,563 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 15:36:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 15:36:01,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 15:36:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:36:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 15:36:01,564 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 15:36:01,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:36:01,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:36:01,629 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:36:01,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:36:01,879 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:36:01,886 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:36:01,886 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-17 15:36:01,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:36:01 BoogieIcfgContainer [2021-12-17 15:36:01,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:36:01,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:36:01,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:36:01,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:36:01,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:36:01" (1/3) ... [2021-12-17 15:36:01,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340ec28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:36:01, skipping insertion in model container [2021-12-17 15:36:01,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:36:01" (2/3) ... [2021-12-17 15:36:01,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340ec28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:36:01, skipping insertion in model container [2021-12-17 15:36:01,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:36:01" (3/3) ... [2021-12-17 15:36:01,903 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-1.c [2021-12-17 15:36:01,906 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:36:01,906 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:36:01,934 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:36:01,938 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 [2021-12-17 15:36:01,938 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:36:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 137 states have (on average 1.6058394160583942) internal successors, (220), 141 states have internal predecessors, (220), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 15:36:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:36:01,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:01,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:36:01,956 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1698734467, now seen corresponding path program 1 times [2021-12-17 15:36:01,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:01,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67066133] [2021-12-17 15:36:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:01,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:36:02,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:02,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67066133] [2021-12-17 15:36:02,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67066133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:02,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:36:02,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:36:02,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332145366] [2021-12-17 15:36:02,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:02,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:36:02,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:36:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:36:02,252 INFO L87 Difference]: Start difference. First operand has 165 states, 137 states have (on average 1.6058394160583942) internal successors, (220), 141 states have internal predecessors, (220), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-12-17 15:36:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:02,648 INFO L93 Difference]: Finished difference Result 363 states and 577 transitions. [2021-12-17 15:36:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 15:36:02,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 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 79 [2021-12-17 15:36:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:02,657 INFO L225 Difference]: With dead ends: 363 [2021-12-17 15:36:02,658 INFO L226 Difference]: Without dead ends: 202 [2021-12-17 15:36:02,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:02,667 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 371 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:02,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 450 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:36:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-17 15:36:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 159. [2021-12-17 15:36:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 133 states have (on average 1.5112781954887218) internal successors, (201), 135 states have internal predecessors, (201), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 15:36:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 237 transitions. [2021-12-17 15:36:02,707 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 237 transitions. Word has length 79 [2021-12-17 15:36:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:02,707 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 237 transitions. [2021-12-17 15:36:02,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-12-17 15:36:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 237 transitions. [2021-12-17 15:36:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:36:02,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:02,710 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] [2021-12-17 15:36:02,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:36:02,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash -209723323, now seen corresponding path program 1 times [2021-12-17 15:36:02,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351991472] [2021-12-17 15:36:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:02,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:36:02,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:02,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351991472] [2021-12-17 15:36:02,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351991472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:02,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:36:02,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:36:02,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948786862] [2021-12-17 15:36:02,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:02,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:36:02,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:36:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:36:02,852 INFO L87 Difference]: Start difference. First operand 159 states and 237 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-12-17 15:36:03,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:03,459 INFO L93 Difference]: Finished difference Result 541 states and 828 transitions. [2021-12-17 15:36:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 15:36:03,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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 79 [2021-12-17 15:36:03,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:03,463 INFO L225 Difference]: With dead ends: 541 [2021-12-17 15:36:03,464 INFO L226 Difference]: Without dead ends: 393 [2021-12-17 15:36:03,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:36:03,466 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 537 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:03,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 718 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 15:36:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-17 15:36:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 306. [2021-12-17 15:36:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 261 states have (on average 1.524904214559387) internal successors, (398), 264 states have internal predecessors, (398), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-17 15:36:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 461 transitions. [2021-12-17 15:36:03,490 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 461 transitions. Word has length 79 [2021-12-17 15:36:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:03,490 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 461 transitions. [2021-12-17 15:36:03,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-12-17 15:36:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 461 transitions. [2021-12-17 15:36:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:36:03,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:03,492 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] [2021-12-17 15:36:03,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:36:03,493 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:03,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1451163839, now seen corresponding path program 1 times [2021-12-17 15:36:03,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:03,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493031208] [2021-12-17 15:36:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:03,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:03,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:03,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:03,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:03,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:03,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:36:03,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:03,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493031208] [2021-12-17 15:36:03,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493031208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:03,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:36:03,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:36:03,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199460419] [2021-12-17 15:36:03,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:03,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:36:03,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:03,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:36:03,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:36:03,582 INFO L87 Difference]: Start difference. First operand 306 states and 461 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:04,309 INFO L93 Difference]: Finished difference Result 881 states and 1347 transitions. [2021-12-17 15:36:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:36:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 79 [2021-12-17 15:36:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:04,316 INFO L225 Difference]: With dead ends: 881 [2021-12-17 15:36:04,316 INFO L226 Difference]: Without dead ends: 586 [2021-12-17 15:36:04,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:36:04,329 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 532 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:04,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 1222 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 15:36:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-12-17 15:36:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 445. [2021-12-17 15:36:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 381 states have (on average 1.5196850393700787) internal successors, (579), 385 states have internal predecessors, (579), 43 states have call successors, (43), 19 states have call predecessors, (43), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-17 15:36:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 668 transitions. [2021-12-17 15:36:04,373 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 668 transitions. Word has length 79 [2021-12-17 15:36:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:04,375 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 668 transitions. [2021-12-17 15:36:04,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:04,375 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 668 transitions. [2021-12-17 15:36:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:36:04,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:04,383 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] [2021-12-17 15:36:04,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:36:04,383 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1505556737, now seen corresponding path program 1 times [2021-12-17 15:36:04,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:04,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491397060] [2021-12-17 15:36:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:04,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:04,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:04,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:04,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:04,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:04,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:36:04,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:04,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491397060] [2021-12-17 15:36:04,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491397060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:04,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:36:04,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:36:04,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661944743] [2021-12-17 15:36:04,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:04,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:36:04,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:36:04,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:36:04,492 INFO L87 Difference]: Start difference. First operand 445 states and 668 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:05,239 INFO L93 Difference]: Finished difference Result 1379 states and 2102 transitions. [2021-12-17 15:36:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:36:05,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 79 [2021-12-17 15:36:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:05,244 INFO L225 Difference]: With dead ends: 1379 [2021-12-17 15:36:05,244 INFO L226 Difference]: Without dead ends: 945 [2021-12-17 15:36:05,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:36:05,246 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 528 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:05,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 1211 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 15:36:05,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-12-17 15:36:05,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 726. [2021-12-17 15:36:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 624 states have (on average 1.516025641025641) internal successors, (946), 630 states have internal predecessors, (946), 67 states have call successors, (67), 31 states have call predecessors, (67), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-17 15:36:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1091 transitions. [2021-12-17 15:36:05,277 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1091 transitions. Word has length 79 [2021-12-17 15:36:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:05,277 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1091 transitions. [2021-12-17 15:36:05,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:05,277 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1091 transitions. [2021-12-17 15:36:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:36:05,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:05,278 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] [2021-12-17 15:36:05,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:36:05,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:05,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1922953343, now seen corresponding path program 1 times [2021-12-17 15:36:05,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:05,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124082808] [2021-12-17 15:36:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:05,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:05,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:05,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:05,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:05,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:36:05,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:05,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124082808] [2021-12-17 15:36:05,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124082808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:05,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:36:05,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:36:05,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064623125] [2021-12-17 15:36:05,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:05,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:36:05,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:05,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:36:05,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:36:05,353 INFO L87 Difference]: Start difference. First operand 726 states and 1091 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:06,161 INFO L93 Difference]: Finished difference Result 2554 states and 3875 transitions. [2021-12-17 15:36:06,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:36:06,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 79 [2021-12-17 15:36:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:06,168 INFO L225 Difference]: With dead ends: 2554 [2021-12-17 15:36:06,168 INFO L226 Difference]: Without dead ends: 1839 [2021-12-17 15:36:06,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 15:36:06,170 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 662 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:06,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 1196 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 15:36:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-12-17 15:36:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1279. [2021-12-17 15:36:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1105 states have (on average 1.5167420814479637) internal successors, (1676), 1115 states have internal predecessors, (1676), 111 states have call successors, (111), 55 states have call predecessors, (111), 62 states have return successors, (144), 116 states have call predecessors, (144), 109 states have call successors, (144) [2021-12-17 15:36:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1931 transitions. [2021-12-17 15:36:06,245 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1931 transitions. Word has length 79 [2021-12-17 15:36:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:06,245 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 1931 transitions. [2021-12-17 15:36:06,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1931 transitions. [2021-12-17 15:36:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:36:06,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:06,247 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] [2021-12-17 15:36:06,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:36:06,248 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1243681089, now seen corresponding path program 1 times [2021-12-17 15:36:06,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:06,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473677956] [2021-12-17 15:36:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:06,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:06,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:06,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:06,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:06,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:06,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:36:06,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473677956] [2021-12-17 15:36:06,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473677956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:06,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:36:06,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:36:06,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137520206] [2021-12-17 15:36:06,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:06,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:36:06,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:06,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:36:06,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:36:06,321 INFO L87 Difference]: Start difference. First operand 1279 states and 1931 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:07,204 INFO L93 Difference]: Finished difference Result 4569 states and 6941 transitions. [2021-12-17 15:36:07,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:36:07,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 79 [2021-12-17 15:36:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:07,217 INFO L225 Difference]: With dead ends: 4569 [2021-12-17 15:36:07,217 INFO L226 Difference]: Without dead ends: 3301 [2021-12-17 15:36:07,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 15:36:07,221 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 548 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:07,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 1231 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 15:36:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2021-12-17 15:36:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 2300. [2021-12-17 15:36:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 1986 states have (on average 1.5075528700906344) internal successors, (2994), 2004 states have internal predecessors, (2994), 195 states have call successors, (195), 103 states have call predecessors, (195), 118 states have return successors, (290), 208 states have call predecessors, (290), 193 states have call successors, (290) [2021-12-17 15:36:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3479 transitions. [2021-12-17 15:36:07,328 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3479 transitions. Word has length 79 [2021-12-17 15:36:07,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:07,329 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 3479 transitions. [2021-12-17 15:36:07,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3479 transitions. [2021-12-17 15:36:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:36:07,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:07,331 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] [2021-12-17 15:36:07,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:36:07,331 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 717893569, now seen corresponding path program 1 times [2021-12-17 15:36:07,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:07,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594384584] [2021-12-17 15:36:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:07,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:07,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:07,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:07,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:07,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:07,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:36:07,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:07,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594384584] [2021-12-17 15:36:07,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594384584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:07,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:36:07,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:36:07,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519761785] [2021-12-17 15:36:07,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:07,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:36:07,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:36:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:36:07,438 INFO L87 Difference]: Start difference. First operand 2300 states and 3479 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:07,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:07,976 INFO L93 Difference]: Finished difference Result 5172 states and 7918 transitions. [2021-12-17 15:36:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:36:07,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 79 [2021-12-17 15:36:07,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:07,987 INFO L225 Difference]: With dead ends: 5172 [2021-12-17 15:36:07,987 INFO L226 Difference]: Without dead ends: 2883 [2021-12-17 15:36:07,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:36:07,994 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 402 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:07,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 601 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:36:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-12-17 15:36:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2300. [2021-12-17 15:36:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 1986 states have (on average 1.498992950654582) internal successors, (2977), 2004 states have internal predecessors, (2977), 195 states have call successors, (195), 103 states have call predecessors, (195), 118 states have return successors, (290), 208 states have call predecessors, (290), 193 states have call successors, (290) [2021-12-17 15:36:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3462 transitions. [2021-12-17 15:36:08,098 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3462 transitions. Word has length 79 [2021-12-17 15:36:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:08,098 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 3462 transitions. [2021-12-17 15:36:08,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3462 transitions. [2021-12-17 15:36:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:36:08,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:08,100 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] [2021-12-17 15:36:08,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 15:36:08,100 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash 919717503, now seen corresponding path program 1 times [2021-12-17 15:36:08,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636872758] [2021-12-17 15:36:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:08,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:08,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:08,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:08,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:08,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:08,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:36:08,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:08,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636872758] [2021-12-17 15:36:08,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636872758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:08,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:36:08,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:36:08,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911787365] [2021-12-17 15:36:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:08,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:36:08,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:36:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:36:08,164 INFO L87 Difference]: Start difference. First operand 2300 states and 3462 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:08,994 INFO L93 Difference]: Finished difference Result 7970 states and 12031 transitions. [2021-12-17 15:36:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:36:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 79 [2021-12-17 15:36:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:09,013 INFO L225 Difference]: With dead ends: 7970 [2021-12-17 15:36:09,013 INFO L226 Difference]: Without dead ends: 5681 [2021-12-17 15:36:09,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 15:36:09,019 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 536 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:09,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1181 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 15:36:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5681 states. [2021-12-17 15:36:09,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5681 to 4430. [2021-12-17 15:36:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 3844 states have (on average 1.4997398543184184) internal successors, (5765), 3878 states have internal predecessors, (5765), 355 states have call successors, (355), 199 states have call predecessors, (355), 230 states have return successors, (628), 384 states have call predecessors, (628), 353 states have call successors, (628) [2021-12-17 15:36:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6748 transitions. [2021-12-17 15:36:09,207 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6748 transitions. Word has length 79 [2021-12-17 15:36:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:09,207 INFO L470 AbstractCegarLoop]: Abstraction has 4430 states and 6748 transitions. [2021-12-17 15:36:09,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2021-12-17 15:36:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6748 transitions. [2021-12-17 15:36:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:36:09,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:09,210 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] [2021-12-17 15:36:09,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 15:36:09,211 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1480417281, now seen corresponding path program 1 times [2021-12-17 15:36:09,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377669315] [2021-12-17 15:36:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:09,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:09,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:09,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:09,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:09,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:36:09,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:09,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377669315] [2021-12-17 15:36:09,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377669315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:09,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:36:09,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:36:09,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440805455] [2021-12-17 15:36:09,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:09,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:36:09,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:09,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:36:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:36:09,267 INFO L87 Difference]: Start difference. First operand 4430 states and 6748 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-12-17 15:36:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:10,114 INFO L93 Difference]: Finished difference Result 12551 states and 19094 transitions. [2021-12-17 15:36:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 15:36:10,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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 79 [2021-12-17 15:36:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:10,156 INFO L225 Difference]: With dead ends: 12551 [2021-12-17 15:36:10,156 INFO L226 Difference]: Without dead ends: 8133 [2021-12-17 15:36:10,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 15:36:10,171 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 686 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:10,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 932 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 15:36:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8133 states. [2021-12-17 15:36:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8133 to 6642. [2021-12-17 15:36:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6642 states, 5749 states have (on average 1.4837363019655592) internal successors, (8530), 5816 states have internal predecessors, (8530), 544 states have call successors, (544), 301 states have call predecessors, (544), 348 states have return successors, (899), 556 states have call predecessors, (899), 542 states have call successors, (899) [2021-12-17 15:36:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6642 states to 6642 states and 9973 transitions. [2021-12-17 15:36:10,474 INFO L78 Accepts]: Start accepts. Automaton has 6642 states and 9973 transitions. Word has length 79 [2021-12-17 15:36:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:10,474 INFO L470 AbstractCegarLoop]: Abstraction has 6642 states and 9973 transitions. [2021-12-17 15:36:10,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-12-17 15:36:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6642 states and 9973 transitions. [2021-12-17 15:36:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 15:36:10,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:10,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:36:10,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:36:10,490 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1253867763, now seen corresponding path program 1 times [2021-12-17 15:36:10,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:10,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565454832] [2021-12-17 15:36:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:10,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 15:36:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 15:36:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:36:10,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:10,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565454832] [2021-12-17 15:36:10,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565454832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:36:10,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386125903] [2021-12-17 15:36:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:10,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:36:10,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:36:10,607 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) [2021-12-17 15:36:10,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 15:36:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:10,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:36:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:36:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 15:36:10,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:36:10,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386125903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:10,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:36:10,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 15:36:10,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692732056] [2021-12-17 15:36:10,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:10,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:36:10,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:36:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:10,915 INFO L87 Difference]: Start difference. First operand 6642 states and 9973 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 15:36:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:11,326 INFO L93 Difference]: Finished difference Result 19723 states and 29809 transitions. [2021-12-17 15:36:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:36:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-17 15:36:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:11,370 INFO L225 Difference]: With dead ends: 19723 [2021-12-17 15:36:11,371 INFO L226 Difference]: Without dead ends: 13093 [2021-12-17 15:36:11,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:11,389 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 189 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:11,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 489 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:36:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13093 states. [2021-12-17 15:36:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13093 to 12989. [2021-12-17 15:36:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12989 states, 11236 states have (on average 1.4813990744037024) internal successors, (16645), 11368 states have internal predecessors, (16645), 1056 states have call successors, (1056), 601 states have call predecessors, (1056), 696 states have return successors, (1737), 1051 states have call predecessors, (1737), 1054 states have call successors, (1737) [2021-12-17 15:36:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12989 states to 12989 states and 19438 transitions. [2021-12-17 15:36:11,852 INFO L78 Accepts]: Start accepts. Automaton has 12989 states and 19438 transitions. Word has length 128 [2021-12-17 15:36:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:11,853 INFO L470 AbstractCegarLoop]: Abstraction has 12989 states and 19438 transitions. [2021-12-17 15:36:11,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 15:36:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 12989 states and 19438 transitions. [2021-12-17 15:36:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 15:36:11,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:11,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:36:11,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 15:36:12,093 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,SelfDestructingSolverStorable9 [2021-12-17 15:36:12,093 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:12,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:12,094 INFO L85 PathProgramCache]: Analyzing trace with hash 115435565, now seen corresponding path program 1 times [2021-12-17 15:36:12,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:12,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832603786] [2021-12-17 15:36:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:12,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 15:36:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 15:36:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:36:12,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832603786] [2021-12-17 15:36:12,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832603786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:36:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788701602] [2021-12-17 15:36:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:12,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:36:12,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:36:12,208 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) [2021-12-17 15:36:12,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 15:36:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:12,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:36:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:36:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 15:36:12,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:36:12,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788701602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:12,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:36:12,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 15:36:12,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722072456] [2021-12-17 15:36:12,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:12,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:36:12,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:12,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:36:12,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:12,468 INFO L87 Difference]: Start difference. First operand 12989 states and 19438 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 15:36:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:13,162 INFO L93 Difference]: Finished difference Result 38586 states and 58136 transitions. [2021-12-17 15:36:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:36:13,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-17 15:36:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:13,244 INFO L225 Difference]: With dead ends: 38586 [2021-12-17 15:36:13,244 INFO L226 Difference]: Without dead ends: 25609 [2021-12-17 15:36:13,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:13,283 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 183 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:13,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 453 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:36:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25609 states. [2021-12-17 15:36:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25609 to 25405. [2021-12-17 15:36:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25405 states, 21958 states have (on average 1.4788687494307313) internal successors, (32473), 22220 states have internal predecessors, (32473), 2054 states have call successors, (2054), 1201 states have call predecessors, (2054), 1392 states have return successors, (3387), 2015 states have call predecessors, (3387), 2052 states have call successors, (3387) [2021-12-17 15:36:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25405 states to 25405 states and 37914 transitions. [2021-12-17 15:36:14,194 INFO L78 Accepts]: Start accepts. Automaton has 25405 states and 37914 transitions. Word has length 128 [2021-12-17 15:36:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:14,195 INFO L470 AbstractCegarLoop]: Abstraction has 25405 states and 37914 transitions. [2021-12-17 15:36:14,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 15:36:14,195 INFO L276 IsEmpty]: Start isEmpty. Operand 25405 states and 37914 transitions. [2021-12-17 15:36:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 15:36:14,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:14,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:36:14,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 15:36:14,458 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,SelfDestructingSolverStorable10 [2021-12-17 15:36:14,458 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:14,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1158895283, now seen corresponding path program 1 times [2021-12-17 15:36:14,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:14,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827575398] [2021-12-17 15:36:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:14,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 15:36:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 15:36:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:36:14,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:14,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827575398] [2021-12-17 15:36:14,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827575398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:36:14,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595423159] [2021-12-17 15:36:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:14,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:36:14,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:36:14,549 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) [2021-12-17 15:36:14,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 15:36:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:14,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:36:14,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:36:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:36:14,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:36:14,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595423159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:14,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:36:14,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 15:36:14,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230208624] [2021-12-17 15:36:14,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:14,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:36:14,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:36:14,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:14,762 INFO L87 Difference]: Start difference. First operand 25405 states and 37914 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 15:36:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:16,007 INFO L93 Difference]: Finished difference Result 74768 states and 112689 transitions. [2021-12-17 15:36:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:36:16,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2021-12-17 15:36:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:16,199 INFO L225 Difference]: With dead ends: 74768 [2021-12-17 15:36:16,199 INFO L226 Difference]: Without dead ends: 49376 [2021-12-17 15:36:16,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:16,258 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 192 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:16,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 664 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:36:16,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49376 states. [2021-12-17 15:36:17,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49376 to 49376. [2021-12-17 15:36:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49376 states, 42622 states have (on average 1.466543099807611) internal successors, (62507), 43077 states have internal predecessors, (62507), 3969 states have call successors, (3969), 2401 states have call predecessors, (3969), 2784 states have return successors, (7350), 3961 states have call predecessors, (7350), 3967 states have call successors, (7350) [2021-12-17 15:36:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49376 states to 49376 states and 73826 transitions. [2021-12-17 15:36:17,981 INFO L78 Accepts]: Start accepts. Automaton has 49376 states and 73826 transitions. Word has length 128 [2021-12-17 15:36:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:17,983 INFO L470 AbstractCegarLoop]: Abstraction has 49376 states and 73826 transitions. [2021-12-17 15:36:17,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 15:36:17,983 INFO L276 IsEmpty]: Start isEmpty. Operand 49376 states and 73826 transitions. [2021-12-17 15:36:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 15:36:18,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:18,088 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:36:18,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 15:36:18,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:36:18,304 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:18,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:18,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1361719287, now seen corresponding path program 1 times [2021-12-17 15:36:18,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:18,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683693374] [2021-12-17 15:36:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:18,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-17 15:36:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 15:36:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-17 15:36:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 15:36:18,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:18,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683693374] [2021-12-17 15:36:18,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683693374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:36:18,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816278952] [2021-12-17 15:36:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:18,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:36:18,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:36:18,392 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) [2021-12-17 15:36:18,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 15:36:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:18,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:36:18,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:36:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:36:18,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:36:18,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816278952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:18,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:36:18,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 15:36:18,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017234499] [2021-12-17 15:36:18,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:18,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:36:18,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:18,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:36:18,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:18,757 INFO L87 Difference]: Start difference. First operand 49376 states and 73826 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 15:36:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:21,411 INFO L93 Difference]: Finished difference Result 145652 states and 219225 transitions. [2021-12-17 15:36:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:36:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-12-17 15:36:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:21,719 INFO L225 Difference]: With dead ends: 145652 [2021-12-17 15:36:21,719 INFO L226 Difference]: Without dead ends: 96294 [2021-12-17 15:36:21,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:21,831 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 139 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:21,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 456 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:36:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96294 states. [2021-12-17 15:36:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96294 to 95490. [2021-12-17 15:36:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95490 states, 82684 states have (on average 1.4664143002273717) internal successors, (121249), 83591 states have internal predecessors, (121249), 7383 states have call successors, (7383), 4655 states have call predecessors, (7383), 5422 states have return successors, (13774), 7307 states have call predecessors, (13774), 7381 states have call successors, (13774) [2021-12-17 15:36:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95490 states to 95490 states and 142406 transitions. [2021-12-17 15:36:25,275 INFO L78 Accepts]: Start accepts. Automaton has 95490 states and 142406 transitions. Word has length 166 [2021-12-17 15:36:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:25,275 INFO L470 AbstractCegarLoop]: Abstraction has 95490 states and 142406 transitions. [2021-12-17 15:36:25,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 15:36:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 95490 states and 142406 transitions. [2021-12-17 15:36:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 15:36:25,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:25,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:36:25,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 15:36:25,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:36:25,753 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:25,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:25,754 INFO L85 PathProgramCache]: Analyzing trace with hash -912610153, now seen corresponding path program 1 times [2021-12-17 15:36:25,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:25,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628913218] [2021-12-17 15:36:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:25,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 15:36:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 15:36:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 15:36:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-17 15:36:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 15:36:25,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:25,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628913218] [2021-12-17 15:36:25,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628913218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:36:25,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393694740] [2021-12-17 15:36:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:25,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:36:25,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:36:25,856 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) [2021-12-17 15:36:25,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 15:36:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:25,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:36:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:36:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 15:36:26,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:36:26,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393694740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:26,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:36:26,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 15:36:26,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858309955] [2021-12-17 15:36:26,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:26,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:36:26,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:26,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:36:26,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:26,401 INFO L87 Difference]: Start difference. First operand 95490 states and 142406 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 15:36:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:28,794 INFO L93 Difference]: Finished difference Result 147356 states and 220295 transitions. [2021-12-17 15:36:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:36:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2021-12-17 15:36:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:29,066 INFO L225 Difference]: With dead ends: 147356 [2021-12-17 15:36:29,066 INFO L226 Difference]: Without dead ends: 81430 [2021-12-17 15:36:29,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:29,168 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 160 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:29,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 274 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:36:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81430 states. [2021-12-17 15:36:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81430 to 58054. [2021-12-17 15:36:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58054 states, 50464 states have (on average 1.41481055802156) internal successors, (71397), 50927 states have internal predecessors, (71397), 4299 states have call successors, (4299), 2907 states have call predecessors, (4299), 3290 states have return successors, (6802), 4251 states have call predecessors, (6802), 4297 states have call successors, (6802) [2021-12-17 15:36:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58054 states to 58054 states and 82498 transitions. [2021-12-17 15:36:31,634 INFO L78 Accepts]: Start accepts. Automaton has 58054 states and 82498 transitions. Word has length 184 [2021-12-17 15:36:31,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:31,634 INFO L470 AbstractCegarLoop]: Abstraction has 58054 states and 82498 transitions. [2021-12-17 15:36:31,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 15:36:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 58054 states and 82498 transitions. [2021-12-17 15:36:31,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 15:36:31,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:31,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:36:31,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 15:36:31,935 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,SelfDestructingSolverStorable13 [2021-12-17 15:36:31,935 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash -427827400, now seen corresponding path program 1 times [2021-12-17 15:36:31,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:31,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206987732] [2021-12-17 15:36:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:31,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:31,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:31,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:31,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:31,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:31,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:32,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 15:36:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:32,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 15:36:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:32,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:32,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 15:36:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:32,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:32,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-17 15:36:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 15:36:32,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:32,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206987732] [2021-12-17 15:36:32,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206987732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:36:32,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006144083] [2021-12-17 15:36:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:32,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:36:32,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:36:32,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:36:32,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 15:36:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 15:36:32,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:36:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 15:36:32,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:36:32,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006144083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:32,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:36:32,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 15:36:32,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594805057] [2021-12-17 15:36:32,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:32,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:36:32,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:32,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:36:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:32,311 INFO L87 Difference]: Start difference. First operand 58054 states and 82498 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 15:36:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:36:34,675 INFO L93 Difference]: Finished difference Result 122722 states and 176437 transitions. [2021-12-17 15:36:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:36:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2021-12-17 15:36:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:36:34,879 INFO L225 Difference]: With dead ends: 122722 [2021-12-17 15:36:34,879 INFO L226 Difference]: Without dead ends: 64688 [2021-12-17 15:36:34,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:34,963 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 182 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:36:34,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 276 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:36:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64688 states. [2021-12-17 15:36:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64688 to 64516. [2021-12-17 15:36:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64516 states, 56482 states have (on average 1.381165681101944) internal successors, (78011), 56945 states have internal predecessors, (78011), 4413 states have call successors, (4413), 3237 states have call predecessors, (4413), 3620 states have return successors, (7230), 4365 states have call predecessors, (7230), 4411 states have call successors, (7230) [2021-12-17 15:36:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64516 states to 64516 states and 89654 transitions. [2021-12-17 15:36:37,569 INFO L78 Accepts]: Start accepts. Automaton has 64516 states and 89654 transitions. Word has length 184 [2021-12-17 15:36:37,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:36:37,570 INFO L470 AbstractCegarLoop]: Abstraction has 64516 states and 89654 transitions. [2021-12-17 15:36:37,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 15:36:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 64516 states and 89654 transitions. [2021-12-17 15:36:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 15:36:37,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:36:37,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:36:37,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 15:36:37,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 15:36:37,910 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:36:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:36:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash -525524426, now seen corresponding path program 1 times [2021-12-17 15:36:37,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:36:37,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043608292] [2021-12-17 15:36:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:37,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:36:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:36:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:36:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:36:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 15:36:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:36:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 15:36:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 15:36:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 15:36:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 15:36:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-17 15:36:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 15:36:37,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:36:37,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043608292] [2021-12-17 15:36:37,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043608292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:36:37,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154688625] [2021-12-17 15:36:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:36:37,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:36:37,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:36:37,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:36:38,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 15:36:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:36:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 15:36:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:36:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 15:36:38,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:36:38,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154688625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:36:38,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:36:38,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 15:36:38,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653267432] [2021-12-17 15:36:38,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:36:38,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:36:38,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:36:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:36:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:36:38,333 INFO L87 Difference]: Start difference. First operand 64516 states and 89654 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)