./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.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 71189e3cc465fa9296e61b90c4b4428a637cf1ec8723797967b75b70226f0c15 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:49:42,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:49:42,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:49:43,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:49:43,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:49:43,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:49:43,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:49:43,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:49:43,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:49:43,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:49:43,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:49:43,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:49:43,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:49:43,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:49:43,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:49:43,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:49:43,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:49:43,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:49:43,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:49:43,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:49:43,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:49:43,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:49:43,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:49:43,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:49:43,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:49:43,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:49:43,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:49:43,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:49:43,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:49:43,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:49:43,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:49:43,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:49:43,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:49:43,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:49:43,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:49:43,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:49:43,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:49:43,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:49:43,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:49:43,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:49:43,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:49:43,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:49:43,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:49:43,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:49:43,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:49:43,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:49:43,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:49:43,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:49:43,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:49:43,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:49:43,047 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:49:43,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:49:43,048 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:49:43,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:49:43,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:49:43,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:49:43,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:49:43,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:49:43,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:49:43,049 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:49:43,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:49:43,050 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:49:43,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:49:43,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:49:43,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:49:43,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:49:43,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:49:43,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:49:43,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:49:43,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:49:43,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:49:43,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:49:43,051 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:49:43,052 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:49:43,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:49:43,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:49:43,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71189e3cc465fa9296e61b90c4b4428a637cf1ec8723797967b75b70226f0c15 [2021-12-21 14:49:43,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:49:43,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:49:43,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:49:43,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:49:43,253 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:49:43,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c [2021-12-21 14:49:43,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2864c5ac/4f7b587210fc494eb08714492a9ed323/FLAG84368fc89 [2021-12-21 14:49:43,612 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:49:43,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c [2021-12-21 14:49:43,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2864c5ac/4f7b587210fc494eb08714492a9ed323/FLAG84368fc89 [2021-12-21 14:49:44,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2864c5ac/4f7b587210fc494eb08714492a9ed323 [2021-12-21 14:49:44,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:49:44,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:49:44,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:49:44,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:49:44,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:49:44,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e7df2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44, skipping insertion in model container [2021-12-21 14:49:44,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:49:44,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:49:44,201 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[913,926] [2021-12-21 14:49:44,226 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[5977,5990] [2021-12-21 14:49:44,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:49:44,298 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:49:44,311 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[913,926] [2021-12-21 14:49:44,323 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[5977,5990] [2021-12-21 14:49:44,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:49:44,392 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:49:44,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44 WrapperNode [2021-12-21 14:49:44,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:49:44,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:49:44,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:49:44,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:49:44,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,454 INFO L137 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 823 [2021-12-21 14:49:44,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:49:44,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:49:44,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:49:44,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:49:44,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:49:44,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:49:44,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:49:44,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:49:44,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (1/1) ... [2021-12-21 14:49:44,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:49:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:44,550 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) [2021-12-21 14:49:44,557 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 [2021-12-21 14:49:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:49:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:49:44,578 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:49:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-21 14:49:44,579 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-21 14:49:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:49:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:49:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:49:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:49:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:49:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:49:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:49:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:49:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:49:44,581 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:49:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:49:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:49:44,581 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:49:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:49:44,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:49:44,582 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:49:44,582 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:49:44,688 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:49:44,699 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:49:45,188 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:49:45,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:49:45,200 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-21 14:49:45,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:49:45 BoogieIcfgContainer [2021-12-21 14:49:45,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:49:45,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:49:45,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:49:45,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:49:45,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:49:44" (1/3) ... [2021-12-21 14:49:45,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2365e2d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:49:45, skipping insertion in model container [2021-12-21 14:49:45,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:49:44" (2/3) ... [2021-12-21 14:49:45,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2365e2d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:49:45, skipping insertion in model container [2021-12-21 14:49:45,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:49:45" (3/3) ... [2021-12-21 14:49:45,209 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-1.c [2021-12-21 14:49:45,216 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:49:45,216 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:49:45,258 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:49:45,266 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 [2021-12-21 14:49:45,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:49:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 354 states, 314 states have (on average 1.6305732484076434) internal successors, (512), 319 states have internal predecessors, (512), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-21 14:49:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 14:49:45,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:45,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:45,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:45,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash -728515796, now seen corresponding path program 1 times [2021-12-21 14:49:45,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:45,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641925572] [2021-12-21 14:49:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:45,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:45,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:45,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 14:49:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:45,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:45,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641925572] [2021-12-21 14:49:45,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641925572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:45,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:45,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:45,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721862322] [2021-12-21 14:49:45,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:45,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:45,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:45,568 INFO L87 Difference]: Start difference. First operand has 354 states, 314 states have (on average 1.6305732484076434) internal successors, (512), 319 states have internal predecessors, (512), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 14:49:45,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:45,966 INFO L93 Difference]: Finished difference Result 695 states and 1111 transitions. [2021-12-21 14:49:45,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-21 14:49:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:45,977 INFO L225 Difference]: With dead ends: 695 [2021-12-21 14:49:45,977 INFO L226 Difference]: Without dead ends: 353 [2021-12-21 14:49:45,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:45,982 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 306 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:45,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1045 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:49:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-21 14:49:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 344. [2021-12-21 14:49:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 306 states have (on average 1.5326797385620916) internal successors, (469), 309 states have internal predecessors, (469), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 14:49:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 523 transitions. [2021-12-21 14:49:46,024 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 523 transitions. Word has length 44 [2021-12-21 14:49:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:46,024 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 523 transitions. [2021-12-21 14:49:46,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 14:49:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 523 transitions. [2021-12-21 14:49:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 14:49:46,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:46,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:46,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:49:46,027 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:46,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:46,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1116851370, now seen corresponding path program 1 times [2021-12-21 14:49:46,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:46,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525857966] [2021-12-21 14:49:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:46,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 14:49:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:46,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:46,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525857966] [2021-12-21 14:49:46,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525857966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:46,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:46,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:46,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424356961] [2021-12-21 14:49:46,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:46,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:46,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:46,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:46,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:46,091 INFO L87 Difference]: Start difference. First operand 344 states and 523 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:46,237 INFO L93 Difference]: Finished difference Result 476 states and 708 transitions. [2021-12-21 14:49:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:46,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-21 14:49:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:46,240 INFO L225 Difference]: With dead ends: 476 [2021-12-21 14:49:46,240 INFO L226 Difference]: Without dead ends: 414 [2021-12-21 14:49:46,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:46,242 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 695 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:46,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 861 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:49:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-12-21 14:49:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 408. [2021-12-21 14:49:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 363 states have (on average 1.5013774104683195) internal successors, (545), 367 states have internal predecessors, (545), 32 states have call successors, (32), 11 states have call predecessors, (32), 11 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2021-12-21 14:49:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 613 transitions. [2021-12-21 14:49:46,272 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 613 transitions. Word has length 44 [2021-12-21 14:49:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:46,273 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 613 transitions. [2021-12-21 14:49:46,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 613 transitions. [2021-12-21 14:49:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:49:46,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:46,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:46,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:49:46,280 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1978263529, now seen corresponding path program 1 times [2021-12-21 14:49:46,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:46,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374774019] [2021-12-21 14:49:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:46,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:49:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:46,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:46,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374774019] [2021-12-21 14:49:46,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374774019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:46,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:46,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:46,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996199581] [2021-12-21 14:49:46,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:46,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:46,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:46,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:46,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:46,347 INFO L87 Difference]: Start difference. First operand 408 states and 613 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:46,593 INFO L93 Difference]: Finished difference Result 656 states and 953 transitions. [2021-12-21 14:49:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:46,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:49:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:46,597 INFO L225 Difference]: With dead ends: 656 [2021-12-21 14:49:46,598 INFO L226 Difference]: Without dead ends: 532 [2021-12-21 14:49:46,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:46,603 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 287 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:46,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 1151 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:49:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-21 14:49:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 475. [2021-12-21 14:49:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 424 states have (on average 1.4834905660377358) internal successors, (629), 428 states have internal predecessors, (629), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2021-12-21 14:49:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 703 transitions. [2021-12-21 14:49:46,638 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 703 transitions. Word has length 45 [2021-12-21 14:49:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:46,638 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 703 transitions. [2021-12-21 14:49:46,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 703 transitions. [2021-12-21 14:49:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:49:46,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:46,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:46,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:49:46,639 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:46,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1032346306, now seen corresponding path program 1 times [2021-12-21 14:49:46,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:46,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946806382] [2021-12-21 14:49:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:46,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:49:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:46,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946806382] [2021-12-21 14:49:46,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946806382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:46,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:46,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:46,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645234141] [2021-12-21 14:49:46,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:46,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:46,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:46,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:46,721 INFO L87 Difference]: Start difference. First operand 475 states and 703 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:46,844 INFO L93 Difference]: Finished difference Result 883 states and 1262 transitions. [2021-12-21 14:49:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:49:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:46,847 INFO L225 Difference]: With dead ends: 883 [2021-12-21 14:49:46,847 INFO L226 Difference]: Without dead ends: 692 [2021-12-21 14:49:46,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:46,849 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 712 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:46,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 883 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:49:46,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-12-21 14:49:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 640. [2021-12-21 14:49:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 570 states have (on average 1.436842105263158) internal successors, (819), 577 states have internal predecessors, (819), 46 states have call successors, (46), 21 states have call predecessors, (46), 22 states have return successors, (56), 42 states have call predecessors, (56), 44 states have call successors, (56) [2021-12-21 14:49:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 921 transitions. [2021-12-21 14:49:46,874 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 921 transitions. Word has length 45 [2021-12-21 14:49:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:46,875 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 921 transitions. [2021-12-21 14:49:46,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:49:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 921 transitions. [2021-12-21 14:49:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 14:49:46,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:46,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:46,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:49:46,878 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash 875979578, now seen corresponding path program 1 times [2021-12-21 14:49:46,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:46,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923621039] [2021-12-21 14:49:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:46,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 14:49:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:49:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:49:46,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:46,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923621039] [2021-12-21 14:49:46,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923621039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:46,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:46,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:46,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597557400] [2021-12-21 14:49:46,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:46,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:46,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:46,974 INFO L87 Difference]: Start difference. First operand 640 states and 921 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:49:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:47,244 INFO L93 Difference]: Finished difference Result 984 states and 1382 transitions. [2021-12-21 14:49:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-21 14:49:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:47,247 INFO L225 Difference]: With dead ends: 984 [2021-12-21 14:49:47,247 INFO L226 Difference]: Without dead ends: 747 [2021-12-21 14:49:47,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:47,248 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 271 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:47,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1180 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:49:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-12-21 14:49:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 709. [2021-12-21 14:49:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 630 states have (on average 1.4111111111111112) internal successors, (889), 638 states have internal predecessors, (889), 51 states have call successors, (51), 24 states have call predecessors, (51), 26 states have return successors, (65), 47 states have call predecessors, (65), 49 states have call successors, (65) [2021-12-21 14:49:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1005 transitions. [2021-12-21 14:49:47,269 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1005 transitions. Word has length 62 [2021-12-21 14:49:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:47,269 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1005 transitions. [2021-12-21 14:49:47,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:49:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1005 transitions. [2021-12-21 14:49:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 14:49:47,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:47,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:47,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:49:47,271 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:47,271 INFO L85 PathProgramCache]: Analyzing trace with hash 263296175, now seen corresponding path program 1 times [2021-12-21 14:49:47,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:47,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691286516] [2021-12-21 14:49:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:47,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:49:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 14:49:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:49:47,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:47,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691286516] [2021-12-21 14:49:47,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691286516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:47,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:47,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:49:47,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122238906] [2021-12-21 14:49:47,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:47,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:47,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:49:47,305 INFO L87 Difference]: Start difference. First operand 709 states and 1005 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:49:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:47,420 INFO L93 Difference]: Finished difference Result 1260 states and 1727 transitions. [2021-12-21 14:49:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:49:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-21 14:49:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:47,424 INFO L225 Difference]: With dead ends: 1260 [2021-12-21 14:49:47,424 INFO L226 Difference]: Without dead ends: 882 [2021-12-21 14:49:47,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:47,425 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 699 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:47,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 880 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:49:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-12-21 14:49:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 827. [2021-12-21 14:49:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 735 states have (on average 1.380952380952381) internal successors, (1015), 744 states have internal predecessors, (1015), 58 states have call successors, (58), 29 states have call predecessors, (58), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2021-12-21 14:49:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1149 transitions. [2021-12-21 14:49:47,451 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1149 transitions. Word has length 67 [2021-12-21 14:49:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:47,451 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1149 transitions. [2021-12-21 14:49:47,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:49:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1149 transitions. [2021-12-21 14:49:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:49:47,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:47,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:47,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:49:47,452 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -160972064, now seen corresponding path program 1 times [2021-12-21 14:49:47,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:47,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349438852] [2021-12-21 14:49:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:47,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:49:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:49:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:49:47,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349438852] [2021-12-21 14:49:47,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349438852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242554674] [2021-12-21 14:49:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:47,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:47,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:47,532 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) [2021-12-21 14:49:47,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:49:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 14:49:47,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:47,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:49:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:49:47,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242554674] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:47,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 14:49:47,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-21 14:49:47,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698634094] [2021-12-21 14:49:47,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:47,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:49:47,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:47,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:49:47,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:49:47,892 INFO L87 Difference]: Start difference. First operand 827 states and 1149 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:49:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:47,995 INFO L93 Difference]: Finished difference Result 882 states and 1216 transitions. [2021-12-21 14:49:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 14:49:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-21 14:49:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:48,000 INFO L225 Difference]: With dead ends: 882 [2021-12-21 14:49:48,000 INFO L226 Difference]: Without dead ends: 879 [2021-12-21 14:49:48,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:49:48,002 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 945 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:48,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 615 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:49:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-12-21 14:49:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 826. [2021-12-21 14:49:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 735 states have (on average 1.3782312925170068) internal successors, (1013), 743 states have internal predecessors, (1013), 57 states have call successors, (57), 29 states have call predecessors, (57), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2021-12-21 14:49:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1146 transitions. [2021-12-21 14:49:48,040 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1146 transitions. Word has length 68 [2021-12-21 14:49:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:48,040 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1146 transitions. [2021-12-21 14:49:48,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:49:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1146 transitions. [2021-12-21 14:49:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:49:48,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:48,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:48,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:48,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:48,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash -696266350, now seen corresponding path program 1 times [2021-12-21 14:49:48,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:48,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405808753] [2021-12-21 14:49:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:48,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:48,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:48,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:49:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:48,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:49:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:49:48,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405808753] [2021-12-21 14:49:48,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405808753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573159618] [2021-12-21 14:49:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:48,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:48,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:48,316 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) [2021-12-21 14:49:48,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:49:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:48,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:49:48,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:48,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:49:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:49:48,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573159618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:49:48,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:49:48,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-21 14:49:48,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722852829] [2021-12-21 14:49:48,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:49:48,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 14:49:48,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:48,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 14:49:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:49:48,781 INFO L87 Difference]: Start difference. First operand 826 states and 1146 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:49:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:49,729 INFO L93 Difference]: Finished difference Result 2355 states and 3143 transitions. [2021-12-21 14:49:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 14:49:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-21 14:49:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:49,735 INFO L225 Difference]: With dead ends: 2355 [2021-12-21 14:49:49,735 INFO L226 Difference]: Without dead ends: 1911 [2021-12-21 14:49:49,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 14:49:49,738 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1066 mSDsluCounter, 2664 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:49,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 3317 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:49:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-12-21 14:49:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1200. [2021-12-21 14:49:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1073 states have (on average 1.3383038210624418) internal successors, (1436), 1087 states have internal predecessors, (1436), 76 states have call successors, (76), 42 states have call predecessors, (76), 49 states have return successors, (107), 71 states have call predecessors, (107), 75 states have call successors, (107) [2021-12-21 14:49:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1619 transitions. [2021-12-21 14:49:49,792 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1619 transitions. Word has length 69 [2021-12-21 14:49:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:49,792 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1619 transitions. [2021-12-21 14:49:49,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:49:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1619 transitions. [2021-12-21 14:49:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 14:49:49,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:49,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:49,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:50,010 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,SelfDestructingSolverStorable7 [2021-12-21 14:49:50,011 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1233481266, now seen corresponding path program 1 times [2021-12-21 14:49:50,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:50,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738518013] [2021-12-21 14:49:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:50,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:49:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:49:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 14:49:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 14:49:50,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:50,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738518013] [2021-12-21 14:49:50,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738518013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:50,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159964303] [2021-12-21 14:49:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:50,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:50,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:50,070 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) [2021-12-21 14:49:50,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:49:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:49:50,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:49:50,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:50,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159964303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:50,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:50,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:49:50,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084071789] [2021-12-21 14:49:50,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:50,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:50,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:50,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:50,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:50,248 INFO L87 Difference]: Start difference. First operand 1200 states and 1619 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:49:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:50,283 INFO L93 Difference]: Finished difference Result 1844 states and 2457 transitions. [2021-12-21 14:49:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:50,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-21 14:49:50,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:50,288 INFO L225 Difference]: With dead ends: 1844 [2021-12-21 14:49:50,288 INFO L226 Difference]: Without dead ends: 1096 [2021-12-21 14:49:50,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:50,289 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 484 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:50,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 628 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-12-21 14:49:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1084. [2021-12-21 14:49:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 970 states have (on average 1.3391752577319587) internal successors, (1299), 984 states have internal predecessors, (1299), 69 states have call successors, (69), 37 states have call predecessors, (69), 43 states have return successors, (96), 63 states have call predecessors, (96), 68 states have call successors, (96) [2021-12-21 14:49:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1464 transitions. [2021-12-21 14:49:50,321 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1464 transitions. Word has length 88 [2021-12-21 14:49:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:50,322 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 1464 transitions. [2021-12-21 14:49:50,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:49:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1464 transitions. [2021-12-21 14:49:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 14:49:50,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:50,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:50,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:50,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:50,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1258930737, now seen corresponding path program 1 times [2021-12-21 14:49:50,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:50,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143349721] [2021-12-21 14:49:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:50,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:49:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:49:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:49:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 14:49:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 14:49:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 14:49:50,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:50,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143349721] [2021-12-21 14:49:50,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143349721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:49:50,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428182699] [2021-12-21 14:49:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:50,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:50,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:49:50,606 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) [2021-12-21 14:49:50,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:49:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:49:50,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:49:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:49:50,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:49:50,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428182699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:50,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:49:50,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:49:50,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477654514] [2021-12-21 14:49:50,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:50,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:49:50,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:49:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:50,798 INFO L87 Difference]: Start difference. First operand 1084 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:49:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:50,833 INFO L93 Difference]: Finished difference Result 1396 states and 1852 transitions. [2021-12-21 14:49:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:49:50,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-21 14:49:50,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:50,834 INFO L225 Difference]: With dead ends: 1396 [2021-12-21 14:49:50,835 INFO L226 Difference]: Without dead ends: 278 [2021-12-21 14:49:50,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:50,837 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 61 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:50,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1065 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:49:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-21 14:49:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-12-21 14:49:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 249 states have (on average 1.5582329317269077) internal successors, (388), 250 states have internal predecessors, (388), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-21 14:49:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 432 transitions. [2021-12-21 14:49:50,846 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 432 transitions. Word has length 103 [2021-12-21 14:49:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:50,846 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 432 transitions. [2021-12-21 14:49:50,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:49:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 432 transitions. [2021-12-21 14:49:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:49:50,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:50,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:50,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 14:49:51,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:49:51,060 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash 167686775, now seen corresponding path program 1 times [2021-12-21 14:49:51,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:51,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558245577] [2021-12-21 14:49:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:51,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:49:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:49:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:49:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:49:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:51,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:51,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558245577] [2021-12-21 14:49:51,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558245577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:51,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:51,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:49:51,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697216396] [2021-12-21 14:49:51,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:51,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:49:51,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:51,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:49:51,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:49:51,152 INFO L87 Difference]: Start difference. First operand 278 states and 432 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:51,722 INFO L93 Difference]: Finished difference Result 645 states and 1020 transitions. [2021-12-21 14:49:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:49:51,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:49:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:51,724 INFO L225 Difference]: With dead ends: 645 [2021-12-21 14:49:51,725 INFO L226 Difference]: Without dead ends: 376 [2021-12-21 14:49:51,725 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 [2021-12-21 14:49:51,726 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 728 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:51,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 777 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:49:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-21 14:49:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 278. [2021-12-21 14:49:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 249 states have (on average 1.5542168674698795) internal successors, (387), 250 states have internal predecessors, (387), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-21 14:49:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 431 transitions. [2021-12-21 14:49:51,738 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 431 transitions. Word has length 134 [2021-12-21 14:49:51,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:51,739 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 431 transitions. [2021-12-21 14:49:51,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:51,739 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 431 transitions. [2021-12-21 14:49:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:49:51,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:51,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:51,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:49:51,742 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash -779351111, now seen corresponding path program 1 times [2021-12-21 14:49:51,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721927187] [2021-12-21 14:49:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:51,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:49:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:49:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:49:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:49:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:51,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:51,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721927187] [2021-12-21 14:49:51,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721927187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:51,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:51,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:49:51,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67079869] [2021-12-21 14:49:51,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:51,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:49:51,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:49:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:49:51,839 INFO L87 Difference]: Start difference. First operand 278 states and 431 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:53,249 INFO L93 Difference]: Finished difference Result 1006 states and 1598 transitions. [2021-12-21 14:49:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:49:53,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:49:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:53,253 INFO L225 Difference]: With dead ends: 1006 [2021-12-21 14:49:53,253 INFO L226 Difference]: Without dead ends: 745 [2021-12-21 14:49:53,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:49:53,254 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 1093 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:53,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 1254 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 14:49:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-12-21 14:49:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 550. [2021-12-21 14:49:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 497 states have (on average 1.567404426559356) internal successors, (779), 499 states have internal predecessors, (779), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-21 14:49:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 860 transitions. [2021-12-21 14:49:53,276 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 860 transitions. Word has length 134 [2021-12-21 14:49:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:53,276 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 860 transitions. [2021-12-21 14:49:53,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 860 transitions. [2021-12-21 14:49:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:49:53,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:53,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:53,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:49:53,278 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1809112637, now seen corresponding path program 1 times [2021-12-21 14:49:53,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:53,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171559771] [2021-12-21 14:49:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:53,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:53,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:53,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:49:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:49:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:53,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:49:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:53,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:49:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:53,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:53,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171559771] [2021-12-21 14:49:53,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171559771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:53,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:53,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:49:53,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236960960] [2021-12-21 14:49:53,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:53,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:49:53,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:53,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:49:53,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:53,384 INFO L87 Difference]: Start difference. First operand 550 states and 860 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:55,112 INFO L93 Difference]: Finished difference Result 1659 states and 2636 transitions. [2021-12-21 14:49:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:49:55,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:49:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:55,117 INFO L225 Difference]: With dead ends: 1659 [2021-12-21 14:49:55,117 INFO L226 Difference]: Without dead ends: 1126 [2021-12-21 14:49:55,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:49:55,118 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 1111 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:55,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 2139 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:49:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-12-21 14:49:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 803. [2021-12-21 14:49:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 726 states have (on average 1.5606060606060606) internal successors, (1133), 729 states have internal predecessors, (1133), 56 states have call successors, (56), 18 states have call predecessors, (56), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2021-12-21 14:49:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1250 transitions. [2021-12-21 14:49:55,163 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1250 transitions. Word has length 134 [2021-12-21 14:49:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:55,163 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1250 transitions. [2021-12-21 14:49:55,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1250 transitions. [2021-12-21 14:49:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:49:55,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:55,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:55,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:49:55,167 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash -483968389, now seen corresponding path program 1 times [2021-12-21 14:49:55,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:55,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832174872] [2021-12-21 14:49:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:55,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:55,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:55,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:49:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:55,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:49:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:55,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:49:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:49:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:55,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:55,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832174872] [2021-12-21 14:49:55,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832174872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:55,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:55,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:49:55,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057980382] [2021-12-21 14:49:55,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:55,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:49:55,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:55,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:49:55,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:55,264 INFO L87 Difference]: Start difference. First operand 803 states and 1250 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:57,026 INFO L93 Difference]: Finished difference Result 2620 states and 4154 transitions. [2021-12-21 14:49:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:49:57,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:49:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:57,032 INFO L225 Difference]: With dead ends: 2620 [2021-12-21 14:49:57,032 INFO L226 Difference]: Without dead ends: 1834 [2021-12-21 14:49:57,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:49:57,034 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 1105 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:57,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 2123 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:49:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-12-21 14:49:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1313. [2021-12-21 14:49:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1188 states have (on average 1.5555555555555556) internal successors, (1848), 1193 states have internal predecessors, (1848), 90 states have call successors, (90), 30 states have call predecessors, (90), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2021-12-21 14:49:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 2041 transitions. [2021-12-21 14:49:57,090 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 2041 transitions. Word has length 134 [2021-12-21 14:49:57,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:57,090 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 2041 transitions. [2021-12-21 14:49:57,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 2041 transitions. [2021-12-21 14:49:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:49:57,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:57,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:57,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:49:57,092 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:57,092 INFO L85 PathProgramCache]: Analyzing trace with hash -12612039, now seen corresponding path program 1 times [2021-12-21 14:49:57,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:57,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55836077] [2021-12-21 14:49:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:57,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:57,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:57,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:49:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:57,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:49:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:57,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:49:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:57,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:49:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:57,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:57,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55836077] [2021-12-21 14:49:57,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55836077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:57,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:57,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:49:57,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247544705] [2021-12-21 14:49:57,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:57,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:49:57,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:57,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:49:57,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:57,166 INFO L87 Difference]: Start difference. First operand 1313 states and 2041 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:49:58,944 INFO L93 Difference]: Finished difference Result 4476 states and 7069 transitions. [2021-12-21 14:49:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:49:58,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:49:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:49:58,954 INFO L225 Difference]: With dead ends: 4476 [2021-12-21 14:49:58,954 INFO L226 Difference]: Without dead ends: 3180 [2021-12-21 14:49:58,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:49:58,957 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 1104 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:49:58,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 2118 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:49:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-12-21 14:49:59,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2334. [2021-12-21 14:49:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2113 states have (on average 1.551348793185045) internal successors, (3278), 2122 states have internal predecessors, (3278), 158 states have call successors, (158), 54 states have call predecessors, (158), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-21 14:49:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3629 transitions. [2021-12-21 14:49:59,060 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3629 transitions. Word has length 134 [2021-12-21 14:49:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:49:59,060 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3629 transitions. [2021-12-21 14:49:59,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:49:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3629 transitions. [2021-12-21 14:49:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:49:59,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:49:59,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:49:59,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:49:59,063 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:49:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:49:59,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1659974981, now seen corresponding path program 1 times [2021-12-21 14:49:59,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:49:59,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926425849] [2021-12-21 14:49:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:49:59,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:49:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:59,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:49:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:59,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:49:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:59,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:49:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:59,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:49:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:59,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:49:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:49:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:49:59,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:49:59,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926425849] [2021-12-21 14:49:59,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926425849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:49:59,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:49:59,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:49:59,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502407613] [2021-12-21 14:49:59,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:49:59,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:49:59,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:49:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:49:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:49:59,155 INFO L87 Difference]: Start difference. First operand 2334 states and 3629 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:00,143 INFO L93 Difference]: Finished difference Result 5512 states and 8710 transitions. [2021-12-21 14:50:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:00,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:50:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:00,154 INFO L225 Difference]: With dead ends: 5512 [2021-12-21 14:50:00,155 INFO L226 Difference]: Without dead ends: 3195 [2021-12-21 14:50:00,160 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 [2021-12-21 14:50:00,160 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 843 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:00,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 1100 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:50:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3195 states. [2021-12-21 14:50:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3195 to 2334. [2021-12-21 14:50:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2113 states have (on average 1.547089446284903) internal successors, (3269), 2122 states have internal predecessors, (3269), 158 states have call successors, (158), 54 states have call predecessors, (158), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-21 14:50:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3620 transitions. [2021-12-21 14:50:00,274 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3620 transitions. Word has length 134 [2021-12-21 14:50:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:00,275 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3620 transitions. [2021-12-21 14:50:00,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3620 transitions. [2021-12-21 14:50:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:50:00,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:00,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:00,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:50:00,279 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:00,279 INFO L85 PathProgramCache]: Analyzing trace with hash 503641593, now seen corresponding path program 1 times [2021-12-21 14:50:00,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:00,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964666332] [2021-12-21 14:50:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:00,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:00,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:00,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:00,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:00,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:00,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:00,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:00,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964666332] [2021-12-21 14:50:00,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964666332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:00,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:00,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:00,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603242675] [2021-12-21 14:50:00,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:00,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:00,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:00,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:00,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:00,371 INFO L87 Difference]: Start difference. First operand 2334 states and 3620 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:01,337 INFO L93 Difference]: Finished difference Result 5502 states and 8663 transitions. [2021-12-21 14:50:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:01,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:50:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:01,348 INFO L225 Difference]: With dead ends: 5502 [2021-12-21 14:50:01,349 INFO L226 Difference]: Without dead ends: 3185 [2021-12-21 14:50:01,353 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 [2021-12-21 14:50:01,354 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 791 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:01,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 1123 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:50:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-12-21 14:50:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2334. [2021-12-21 14:50:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2113 states have (on average 1.542830099384761) internal successors, (3260), 2122 states have internal predecessors, (3260), 158 states have call successors, (158), 54 states have call predecessors, (158), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-21 14:50:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3611 transitions. [2021-12-21 14:50:01,470 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3611 transitions. Word has length 134 [2021-12-21 14:50:01,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:01,470 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3611 transitions. [2021-12-21 14:50:01,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3611 transitions. [2021-12-21 14:50:01,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:50:01,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:01,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:01,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:50:01,472 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash -534942981, now seen corresponding path program 1 times [2021-12-21 14:50:01,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:01,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662723961] [2021-12-21 14:50:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:01,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:01,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:01,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:01,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:01,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:01,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:01,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:01,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662723961] [2021-12-21 14:50:01,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662723961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:01,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:01,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:01,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824635457] [2021-12-21 14:50:01,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:01,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:01,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:01,560 INFO L87 Difference]: Start difference. First operand 2334 states and 3611 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:02,410 INFO L93 Difference]: Finished difference Result 5492 states and 8616 transitions. [2021-12-21 14:50:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:02,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:50:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:02,428 INFO L225 Difference]: With dead ends: 5492 [2021-12-21 14:50:02,429 INFO L226 Difference]: Without dead ends: 3175 [2021-12-21 14:50:02,434 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 [2021-12-21 14:50:02,434 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 907 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:02,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 976 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:50:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2021-12-21 14:50:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 2334. [2021-12-21 14:50:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2113 states have (on average 1.538570752484619) internal successors, (3251), 2122 states have internal predecessors, (3251), 158 states have call successors, (158), 54 states have call predecessors, (158), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-21 14:50:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3602 transitions. [2021-12-21 14:50:02,569 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3602 transitions. Word has length 134 [2021-12-21 14:50:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:02,569 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3602 transitions. [2021-12-21 14:50:02,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3602 transitions. [2021-12-21 14:50:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:50:02,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:02,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:02,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:50:02,572 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:02,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1786858937, now seen corresponding path program 1 times [2021-12-21 14:50:02,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:02,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921186564] [2021-12-21 14:50:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:02,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:02,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:02,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:02,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:02,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:02,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:02,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921186564] [2021-12-21 14:50:02,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921186564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:02,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:02,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:02,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868220556] [2021-12-21 14:50:02,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:02,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:02,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:02,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:02,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:02,672 INFO L87 Difference]: Start difference. First operand 2334 states and 3602 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:04,592 INFO L93 Difference]: Finished difference Result 8157 states and 12723 transitions. [2021-12-21 14:50:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:04,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:50:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:04,617 INFO L225 Difference]: With dead ends: 8157 [2021-12-21 14:50:04,617 INFO L226 Difference]: Without dead ends: 5840 [2021-12-21 14:50:04,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:04,623 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 1082 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:04,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1097 Valid, 2095 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 14:50:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2021-12-21 14:50:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 4410. [2021-12-21 14:50:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4410 states, 3997 states have (on average 1.532899674756067) internal successors, (6127), 4014 states have internal predecessors, (6127), 294 states have call successors, (294), 102 states have call predecessors, (294), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-21 14:50:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4410 states to 4410 states and 6812 transitions. [2021-12-21 14:50:04,873 INFO L78 Accepts]: Start accepts. Automaton has 4410 states and 6812 transitions. Word has length 134 [2021-12-21 14:50:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:04,873 INFO L470 AbstractCegarLoop]: Abstraction has 4410 states and 6812 transitions. [2021-12-21 14:50:04,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4410 states and 6812 transitions. [2021-12-21 14:50:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:50:04,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:04,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:04,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:50:04,877 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:04,877 INFO L85 PathProgramCache]: Analyzing trace with hash -355001541, now seen corresponding path program 1 times [2021-12-21 14:50:04,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:04,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048278840] [2021-12-21 14:50:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:04,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:04,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:04,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048278840] [2021-12-21 14:50:04,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048278840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:04,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:04,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:04,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010446854] [2021-12-21 14:50:04,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:04,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:04,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:04,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:04,955 INFO L87 Difference]: Start difference. First operand 4410 states and 6812 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:07,523 INFO L93 Difference]: Finished difference Result 17519 states and 27285 transitions. [2021-12-21 14:50:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:50:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:50:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:07,568 INFO L225 Difference]: With dead ends: 17519 [2021-12-21 14:50:07,568 INFO L226 Difference]: Without dead ends: 13126 [2021-12-21 14:50:07,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:50:07,581 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 1414 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:07,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1438 Valid, 2078 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2066 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:50:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13126 states. [2021-12-21 14:50:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13126 to 8523. [2021-12-21 14:50:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8523 states, 7742 states have (on average 1.5315164040299665) internal successors, (11857), 7775 states have internal predecessors, (11857), 550 states have call successors, (550), 198 states have call predecessors, (550), 230 states have return successors, (825), 581 states have call predecessors, (825), 550 states have call successors, (825) [2021-12-21 14:50:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 13232 transitions. [2021-12-21 14:50:08,158 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 13232 transitions. Word has length 134 [2021-12-21 14:50:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:08,159 INFO L470 AbstractCegarLoop]: Abstraction has 8523 states and 13232 transitions. [2021-12-21 14:50:08,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 13232 transitions. [2021-12-21 14:50:08,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:50:08,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:08,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:08,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:50:08,165 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:08,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:08,165 INFO L85 PathProgramCache]: Analyzing trace with hash -978283143, now seen corresponding path program 1 times [2021-12-21 14:50:08,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:08,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650520350] [2021-12-21 14:50:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:08,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:08,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:08,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:08,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:08,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:08,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650520350] [2021-12-21 14:50:08,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650520350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:08,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:08,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:08,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425484756] [2021-12-21 14:50:08,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:08,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:08,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:08,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:08,274 INFO L87 Difference]: Start difference. First operand 8523 states and 13232 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:12,079 INFO L93 Difference]: Finished difference Result 33324 states and 52167 transitions. [2021-12-21 14:50:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:50:12,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:50:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:12,154 INFO L225 Difference]: With dead ends: 33324 [2021-12-21 14:50:12,154 INFO L226 Difference]: Without dead ends: 24818 [2021-12-21 14:50:12,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:50:12,181 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 1142 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:12,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 2177 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:50:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24818 states. [2021-12-21 14:50:13,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24818 to 16765. [2021-12-21 14:50:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16765 states, 15264 states have (on average 1.532822327044025) internal successors, (23397), 15329 states have internal predecessors, (23397), 1046 states have call successors, (1046), 390 states have call predecessors, (1046), 454 states have return successors, (1839), 1109 states have call predecessors, (1839), 1046 states have call successors, (1839) [2021-12-21 14:50:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16765 states to 16765 states and 26282 transitions. [2021-12-21 14:50:13,408 INFO L78 Accepts]: Start accepts. Automaton has 16765 states and 26282 transitions. Word has length 134 [2021-12-21 14:50:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:13,409 INFO L470 AbstractCegarLoop]: Abstraction has 16765 states and 26282 transitions. [2021-12-21 14:50:13,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 16765 states and 26282 transitions. [2021-12-21 14:50:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:50:13,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:13,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:13,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:50:13,418 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash 411010871, now seen corresponding path program 1 times [2021-12-21 14:50:13,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:13,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140151063] [2021-12-21 14:50:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:13,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:13,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:13,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140151063] [2021-12-21 14:50:13,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140151063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:13,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:13,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:13,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284046041] [2021-12-21 14:50:13,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:13,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:13,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:13,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:13,503 INFO L87 Difference]: Start difference. First operand 16765 states and 26282 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:19,100 INFO L93 Difference]: Finished difference Result 64764 states and 102287 transitions. [2021-12-21 14:50:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:50:19,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:50:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:19,314 INFO L225 Difference]: With dead ends: 64764 [2021-12-21 14:50:19,314 INFO L226 Difference]: Without dead ends: 48016 [2021-12-21 14:50:19,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:50:19,359 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 1291 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:19,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 2064 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2040 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:50:19,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48016 states. [2021-12-21 14:50:21,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48016 to 33214. [2021-12-21 14:50:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33214 states, 30305 states have (on average 1.5344992575482594) internal successors, (46503), 30434 states have internal predecessors, (46503), 2006 states have call successors, (2006), 774 states have call predecessors, (2006), 902 states have return successors, (4321), 2133 states have call predecessors, (4321), 2006 states have call successors, (4321) [2021-12-21 14:50:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33214 states to 33214 states and 52830 transitions. [2021-12-21 14:50:21,912 INFO L78 Accepts]: Start accepts. Automaton has 33214 states and 52830 transitions. Word has length 134 [2021-12-21 14:50:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:21,913 INFO L470 AbstractCegarLoop]: Abstraction has 33214 states and 52830 transitions. [2021-12-21 14:50:21,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 33214 states and 52830 transitions. [2021-12-21 14:50:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:50:21,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:21,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:21,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 14:50:21,931 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1622383175, now seen corresponding path program 1 times [2021-12-21 14:50:21,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:21,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753013196] [2021-12-21 14:50:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:21,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:21,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:21,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:22,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753013196] [2021-12-21 14:50:22,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753013196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:22,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:22,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:22,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005313829] [2021-12-21 14:50:22,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:22,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:22,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:22,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:22,030 INFO L87 Difference]: Start difference. First operand 33214 states and 52830 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:32,103 INFO L93 Difference]: Finished difference Result 126459 states and 202581 transitions. [2021-12-21 14:50:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:50:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-21 14:50:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:32,423 INFO L225 Difference]: With dead ends: 126459 [2021-12-21 14:50:32,423 INFO L226 Difference]: Without dead ends: 93262 [2021-12-21 14:50:32,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:50:32,523 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 1176 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 2102 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:32,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 1529 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2102 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:50:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93262 states. [2021-12-21 14:50:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93262 to 66047. [2021-12-21 14:50:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66047 states, 60386 states have (on average 1.5363991653694564) internal successors, (92777), 60643 states have internal predecessors, (92777), 3862 states have call successors, (3862), 1542 states have call predecessors, (3862), 1798 states have return successors, (10679), 4117 states have call predecessors, (10679), 3862 states have call successors, (10679) [2021-12-21 14:50:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66047 states to 66047 states and 107318 transitions. [2021-12-21 14:50:37,384 INFO L78 Accepts]: Start accepts. Automaton has 66047 states and 107318 transitions. Word has length 134 [2021-12-21 14:50:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:37,384 INFO L470 AbstractCegarLoop]: Abstraction has 66047 states and 107318 transitions. [2021-12-21 14:50:37,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:50:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 66047 states and 107318 transitions. [2021-12-21 14:50:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:50:37,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:37,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:37,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 14:50:37,414 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:37,415 INFO L85 PathProgramCache]: Analyzing trace with hash 805875447, now seen corresponding path program 1 times [2021-12-21 14:50:37,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:37,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807144341] [2021-12-21 14:50:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:37,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:37,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807144341] [2021-12-21 14:50:37,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807144341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:37,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:37,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:37,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474794375] [2021-12-21 14:50:37,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:37,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:37,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:37,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:37,492 INFO L87 Difference]: Start difference. First operand 66047 states and 107318 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)