./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem05_label42+token_ring.03.cil-2.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 416d3b74bdc0e830f927a3018e8747e6a310d2a238902dccf396a8065404f3af --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:32:03,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:32:03,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:32:04,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:32:04,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:32:04,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:32:04,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:32:04,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:32:04,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:32:04,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:32:04,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:32:04,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:32:04,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:32:04,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:32:04,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:32:04,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:32:04,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:32:04,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:32:04,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:32:04,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:32:04,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:32:04,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:32:04,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:32:04,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:32:04,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:32:04,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:32:04,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:32:04,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:32:04,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:32:04,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:32:04,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:32:04,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:32:04,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:32:04,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:32:04,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:32:04,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:32:04,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:32:04,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:32:04,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:32:04,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:32:04,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:32:04,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:32:04,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:32:04,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:32:04,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:32:04,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:32:04,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:32:04,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:32:04,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:32:04,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:32:04,098 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:32:04,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:32:04,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:32:04,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:32:04,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:32:04,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:32:04,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:32:04,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:32:04,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:32:04,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:32:04,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:32:04,100 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:32:04,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:32:04,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:32:04,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:32:04,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:32:04,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:32:04,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:32:04,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:32:04,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:32:04,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:32:04,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:32:04,101 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:32:04,102 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:32:04,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:32:04,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:32:04,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 416d3b74bdc0e830f927a3018e8747e6a310d2a238902dccf396a8065404f3af [2021-12-22 12:32:04,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:32:04,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:32:04,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:32:04,316 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:32:04,316 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:32:04,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c [2021-12-22 12:32:04,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7a03bb7/67cd7eb58b284cff8acfffef2386298b/FLAGee8b04c7d [2021-12-22 12:32:05,093 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:32:05,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c [2021-12-22 12:32:05,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7a03bb7/67cd7eb58b284cff8acfffef2386298b/FLAGee8b04c7d [2021-12-22 12:32:05,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7a03bb7/67cd7eb58b284cff8acfffef2386298b [2021-12-22 12:32:05,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:32:05,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:32:05,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:32:05,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:32:05,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:32:05,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:32:05" (1/1) ... [2021-12-22 12:32:05,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c483b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:05, skipping insertion in model container [2021-12-22 12:32:05,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:32:05" (1/1) ... [2021-12-22 12:32:05,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:32:05,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:32:06,954 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/Problem05_label42+token_ring.03.cil-2.c[378560,378573] [2021-12-22 12:32:06,975 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/Problem05_label42+token_ring.03.cil-2.c[383339,383352] [2021-12-22 12:32:07,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:32:07,129 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:32:07,773 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/Problem05_label42+token_ring.03.cil-2.c[378560,378573] [2021-12-22 12:32:07,778 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/Problem05_label42+token_ring.03.cil-2.c[383339,383352] [2021-12-22 12:32:07,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:32:07,835 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:32:07,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07 WrapperNode [2021-12-22 12:32:07,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:32:07,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:32:07,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:32:07,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:32:07,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:07,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:08,261 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-12-22 12:32:08,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:32:08,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:32:08,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:32:08,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:32:08,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:08,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:08,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:08,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:08,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:08,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:08,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:08,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:32:08,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:32:08,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:32:08,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:32:08,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (1/1) ... [2021-12-22 12:32:08,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:32:08,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:08,655 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) [2021-12-22 12:32:08,675 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 [2021-12-22 12:32:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:32:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-22 12:32:08,686 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-22 12:32:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 12:32:08,686 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 12:32:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-22 12:32:08,687 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-22 12:32:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-22 12:32:08,687 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-22 12:32:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-22 12:32:08,687 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-22 12:32:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-22 12:32:08,687 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-22 12:32:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:32:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:32:08,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:32:08,778 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:32:08,780 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:32:14,292 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:32:14,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:32:14,316 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-22 12:32:14,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:32:14 BoogieIcfgContainer [2021-12-22 12:32:14,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:32:14,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:32:14,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:32:14,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:32:14,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:32:05" (1/3) ... [2021-12-22 12:32:14,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab1929a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:32:14, skipping insertion in model container [2021-12-22 12:32:14,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:32:07" (2/3) ... [2021-12-22 12:32:14,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab1929a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:32:14, skipping insertion in model container [2021-12-22 12:32:14,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:32:14" (3/3) ... [2021-12-22 12:32:14,325 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.03.cil-2.c [2021-12-22 12:32:14,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:32:14,329 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:32:14,369 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:32:14,374 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 [2021-12-22 12:32:14,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:32:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-22 12:32:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:32:14,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:14,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:14,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-12-22 12:32:14,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:14,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767312238] [2021-12-22 12:32:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:14,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:14,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767312238] [2021-12-22 12:32:14,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767312238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:14,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:14,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:32:14,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389609430] [2021-12-22 12:32:14,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:14,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:32:14,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:14,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:32:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:32:14,827 INFO L87 Difference]: Start difference. First operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-22 12:32:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:15,639 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-12-22 12:32:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:32:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 79 [2021-12-22 12:32:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:15,663 INFO L225 Difference]: With dead ends: 4899 [2021-12-22 12:32:15,664 INFO L226 Difference]: Without dead ends: 2500 [2021-12-22 12:32:15,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 12:32:15,675 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:15,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:32:15,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-22 12:32:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-12-22 12:32:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8291859974694222) internal successors, (4337), 2374 states have internal predecessors, (4337), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-22 12:32:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-12-22 12:32:15,790 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-12-22 12:32:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:15,790 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-12-22 12:32:15,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-22 12:32:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-12-22 12:32:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:32:15,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:15,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:15,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:32:15,801 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-12-22 12:32:15,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:15,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450321831] [2021-12-22 12:32:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:15,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:15,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:15,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:15,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:15,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:15,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:16,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:16,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450321831] [2021-12-22 12:32:16,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450321831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:16,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:16,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:16,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774908038] [2021-12-22 12:32:16,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:16,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:16,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:16,042 INFO L87 Difference]: Start difference. First operand 2415 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:16,996 INFO L93 Difference]: Finished difference Result 2969 states and 5244 transitions. [2021-12-22 12:32:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:32:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-22 12:32:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:17,006 INFO L225 Difference]: With dead ends: 2969 [2021-12-22 12:32:17,007 INFO L226 Difference]: Without dead ends: 2686 [2021-12-22 12:32:17,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 12:32:17,013 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 4469 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20915 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:17,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20915 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 12:32:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-12-22 12:32:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2548. [2021-12-22 12:32:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2485 states have (on average 1.8132796780684104) internal successors, (4506), 2489 states have internal predecessors, (4506), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-22 12:32:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4593 transitions. [2021-12-22 12:32:17,074 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4593 transitions. Word has length 79 [2021-12-22 12:32:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:17,075 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4593 transitions. [2021-12-22 12:32:17,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4593 transitions. [2021-12-22 12:32:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:32:17,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:17,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:17,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:32:17,077 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-12-22 12:32:17,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:17,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098973347] [2021-12-22 12:32:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:17,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:17,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:17,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:17,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:17,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:17,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:17,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:17,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098973347] [2021-12-22 12:32:17,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098973347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:17,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:17,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:17,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433228736] [2021-12-22 12:32:17,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:17,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:17,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:17,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:17,159 INFO L87 Difference]: Start difference. First operand 2548 states and 4593 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:18,118 INFO L93 Difference]: Finished difference Result 3451 states and 5967 transitions. [2021-12-22 12:32:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:32:18,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-22 12:32:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:18,130 INFO L225 Difference]: With dead ends: 3451 [2021-12-22 12:32:18,130 INFO L226 Difference]: Without dead ends: 3035 [2021-12-22 12:32:18,133 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 [2021-12-22 12:32:18,134 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4466 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 20903 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:18,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 20903 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 12:32:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-12-22 12:32:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2815. [2021-12-22 12:32:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2714 states have (on average 1.7851879145173175) internal successors, (4845), 2720 states have internal predecessors, (4845), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-22 12:32:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 4988 transitions. [2021-12-22 12:32:18,217 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 4988 transitions. Word has length 79 [2021-12-22 12:32:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:18,217 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 4988 transitions. [2021-12-22 12:32:18,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 4988 transitions. [2021-12-22 12:32:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:32:18,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:18,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:18,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:32:18,219 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-12-22 12:32:18,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:18,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8865561] [2021-12-22 12:32:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:18,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:18,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:18,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:18,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:18,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:18,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:18,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:18,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8865561] [2021-12-22 12:32:18,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8865561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:18,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:18,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:18,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593075065] [2021-12-22 12:32:18,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:18,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:18,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:18,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:18,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:18,345 INFO L87 Difference]: Start difference. First operand 2815 states and 4988 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:19,512 INFO L93 Difference]: Finished difference Result 4382 states and 7362 transitions. [2021-12-22 12:32:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:32:19,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-22 12:32:19,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:19,526 INFO L225 Difference]: With dead ends: 4382 [2021-12-22 12:32:19,527 INFO L226 Difference]: Without dead ends: 3699 [2021-12-22 12:32:19,530 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 [2021-12-22 12:32:19,538 INFO L933 BasicCegarLoop]: 4308 mSDtfsCounter, 4462 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 20899 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:19,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4472 Valid, 20899 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 12:32:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-12-22 12:32:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3350. [2021-12-22 12:32:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7406240151276395) internal successors, (5523), 3183 states have internal predecessors, (5523), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-22 12:32:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5784 transitions. [2021-12-22 12:32:19,633 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5784 transitions. Word has length 79 [2021-12-22 12:32:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:19,633 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5784 transitions. [2021-12-22 12:32:19,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5784 transitions. [2021-12-22 12:32:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:32:19,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:19,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:19,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:32:19,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-12-22 12:32:19,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:19,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262467864] [2021-12-22 12:32:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:19,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:19,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262467864] [2021-12-22 12:32:19,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262467864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:19,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:19,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:19,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9170457] [2021-12-22 12:32:19,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:19,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:19,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:19,730 INFO L87 Difference]: Start difference. First operand 3350 states and 5784 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:20,621 INFO L93 Difference]: Finished difference Result 6651 states and 10762 transitions. [2021-12-22 12:32:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:32:20,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-22 12:32:20,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:20,640 INFO L225 Difference]: With dead ends: 6651 [2021-12-22 12:32:20,641 INFO L226 Difference]: Without dead ends: 5433 [2021-12-22 12:32:20,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:32:20,646 INFO L933 BasicCegarLoop]: 4302 mSDtfsCounter, 4593 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4607 SdHoareTripleChecker+Valid, 20885 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:20,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4607 Valid, 20885 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:32:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2021-12-22 12:32:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 4401. [2021-12-22 12:32:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 4080 states have (on average 1.683578431372549) internal successors, (6869), 4098 states have internal predecessors, (6869), 201 states have call successors, (201), 102 states have call predecessors, (201), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2021-12-22 12:32:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 7368 transitions. [2021-12-22 12:32:20,776 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 7368 transitions. Word has length 79 [2021-12-22 12:32:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:20,777 INFO L470 AbstractCegarLoop]: Abstraction has 4401 states and 7368 transitions. [2021-12-22 12:32:20,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 7368 transitions. [2021-12-22 12:32:20,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:32:20,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:20,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:20,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:32:20,784 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:20,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-12-22 12:32:20,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:20,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272647023] [2021-12-22 12:32:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:20,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:20,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:20,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:20,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:20,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:20,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:20,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:20,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272647023] [2021-12-22 12:32:20,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272647023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:20,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:20,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:20,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471656574] [2021-12-22 12:32:20,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:20,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:20,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:20,898 INFO L87 Difference]: Start difference. First operand 4401 states and 7368 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:21,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:21,974 INFO L93 Difference]: Finished difference Result 10516 states and 16624 transitions. [2021-12-22 12:32:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:32:21,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-22 12:32:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:22,028 INFO L225 Difference]: With dead ends: 10516 [2021-12-22 12:32:22,029 INFO L226 Difference]: Without dead ends: 8247 [2021-12-22 12:32:22,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:32:22,040 INFO L933 BasicCegarLoop]: 4339 mSDtfsCounter, 4479 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4488 SdHoareTripleChecker+Valid, 20919 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:22,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4488 Valid, 20919 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:32:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2021-12-22 12:32:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 6412. [2021-12-22 12:32:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6412 states, 5811 states have (on average 1.6236448115642748) internal successors, (9435), 5845 states have internal predecessors, (9435), 369 states have call successors, (369), 198 states have call predecessors, (369), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2021-12-22 12:32:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6412 states to 6412 states and 10448 transitions. [2021-12-22 12:32:22,247 INFO L78 Accepts]: Start accepts. Automaton has 6412 states and 10448 transitions. Word has length 79 [2021-12-22 12:32:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:22,248 INFO L470 AbstractCegarLoop]: Abstraction has 6412 states and 10448 transitions. [2021-12-22 12:32:22,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 6412 states and 10448 transitions. [2021-12-22 12:32:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:32:22,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:22,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:22,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:32:22,253 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-12-22 12:32:22,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:22,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629392272] [2021-12-22 12:32:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:22,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:22,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:22,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:22,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:22,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:22,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:22,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:22,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629392272] [2021-12-22 12:32:22,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629392272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:22,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:22,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:32:22,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068893018] [2021-12-22 12:32:22,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:22,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:32:22,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:32:22,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:32:22,356 INFO L87 Difference]: Start difference. First operand 6412 states and 10448 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:23,537 INFO L93 Difference]: Finished difference Result 17230 states and 26990 transitions. [2021-12-22 12:32:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:32:23,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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 79 [2021-12-22 12:32:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:23,587 INFO L225 Difference]: With dead ends: 17230 [2021-12-22 12:32:23,587 INFO L226 Difference]: Without dead ends: 12950 [2021-12-22 12:32:23,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:32:23,602 INFO L933 BasicCegarLoop]: 4289 mSDtfsCounter, 4470 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4484 SdHoareTripleChecker+Valid, 20872 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:23,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4484 Valid, 20872 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:32:23,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12950 states. [2021-12-22 12:32:23,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12950 to 10528. [2021-12-22 12:32:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10528 states, 9383 states have (on average 1.5742299904081851) internal successors, (14771), 9449 states have internal predecessors, (14771), 689 states have call successors, (689), 390 states have call predecessors, (689), 454 states have return successors, (1482), 752 states have call predecessors, (1482), 689 states have call successors, (1482) [2021-12-22 12:32:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10528 states to 10528 states and 16942 transitions. [2021-12-22 12:32:23,932 INFO L78 Accepts]: Start accepts. Automaton has 10528 states and 16942 transitions. Word has length 79 [2021-12-22 12:32:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:23,933 INFO L470 AbstractCegarLoop]: Abstraction has 10528 states and 16942 transitions. [2021-12-22 12:32:23,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 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) [2021-12-22 12:32:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 10528 states and 16942 transitions. [2021-12-22 12:32:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:32:23,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:23,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:23,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:32:23,941 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-12-22 12:32:23,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:23,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185377738] [2021-12-22 12:32:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:23,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:23,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:24,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:24,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:32:24,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185377738] [2021-12-22 12:32:24,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185377738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:24,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:32:24,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:32:24,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023511208] [2021-12-22 12:32:24,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:24,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:32:24,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:24,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:32:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:32:24,022 INFO L87 Difference]: Start difference. First operand 10528 states and 16942 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-22 12:32:25,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:25,413 INFO L93 Difference]: Finished difference Result 25979 states and 40698 transitions. [2021-12-22 12:32:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:32:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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 79 [2021-12-22 12:32:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:25,493 INFO L225 Difference]: With dead ends: 25979 [2021-12-22 12:32:25,493 INFO L226 Difference]: Without dead ends: 17584 [2021-12-22 12:32:25,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-22 12:32:25,523 INFO L933 BasicCegarLoop]: 4388 mSDtfsCounter, 4630 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4657 SdHoareTripleChecker+Valid, 16733 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:25,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4657 Valid, 16733 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:32:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17584 states. [2021-12-22 12:32:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17584 to 14721. [2021-12-22 12:32:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14721 states, 12981 states have (on average 1.5384793159232726) internal successors, (19971), 13112 states have internal predecessors, (19971), 1054 states have call successors, (1054), 588 states have call predecessors, (1054), 684 states have return successors, (2091), 1084 states have call predecessors, (2091), 1054 states have call successors, (2091) [2021-12-22 12:32:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14721 states to 14721 states and 23116 transitions. [2021-12-22 12:32:26,110 INFO L78 Accepts]: Start accepts. Automaton has 14721 states and 23116 transitions. Word has length 79 [2021-12-22 12:32:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 14721 states and 23116 transitions. [2021-12-22 12:32:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-12-22 12:32:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14721 states and 23116 transitions. [2021-12-22 12:32:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-22 12:32:26,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:26,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:26,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:32:26,174 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:26,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-12-22 12:32:26,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:26,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743855847] [2021-12-22 12:32:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:26,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 12:32:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 12:32:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:32:26,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:26,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743855847] [2021-12-22 12:32:26,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743855847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:26,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050660014] [2021-12-22 12:32:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:26,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:26,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:26,330 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) [2021-12-22 12:32:26,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:32:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 12:32:26,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:26,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050660014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:26,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:26,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:32:26,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986205871] [2021-12-22 12:32:26,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:26,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:26,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:26,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:26,672 INFO L87 Difference]: Start difference. First operand 14721 states and 23116 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 12:32:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:27,428 INFO L93 Difference]: Finished difference Result 39550 states and 61248 transitions. [2021-12-22 12:32:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-22 12:32:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:27,517 INFO L225 Difference]: With dead ends: 39550 [2021-12-22 12:32:27,517 INFO L226 Difference]: Without dead ends: 26962 [2021-12-22 12:32:27,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:27,559 INFO L933 BasicCegarLoop]: 4192 mSDtfsCounter, 4136 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4136 SdHoareTripleChecker+Valid, 4390 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:27,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4136 Valid, 4390 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26962 states. [2021-12-22 12:32:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26962 to 26764. [2021-12-22 12:32:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26764 states, 23340 states have (on average 1.5074550128534705) internal successors, (35184), 23600 states have internal predecessors, (35184), 2054 states have call successors, (2054), 1176 states have call predecessors, (2054), 1368 states have return successors, (4065), 2051 states have call predecessors, (4065), 2054 states have call successors, (4065) [2021-12-22 12:32:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26764 states to 26764 states and 41303 transitions. [2021-12-22 12:32:28,438 INFO L78 Accepts]: Start accepts. Automaton has 26764 states and 41303 transitions. Word has length 128 [2021-12-22 12:32:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:28,438 INFO L470 AbstractCegarLoop]: Abstraction has 26764 states and 41303 transitions. [2021-12-22 12:32:28,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 12:32:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 26764 states and 41303 transitions. [2021-12-22 12:32:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-22 12:32:28,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:28,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:28,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:28,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:28,903 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-12-22 12:32:28,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:28,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514817896] [2021-12-22 12:32:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:28,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:28,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:28,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:28,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:29,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:29,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:29,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 12:32:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:29,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:29,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 12:32:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:32:29,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:29,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514817896] [2021-12-22 12:32:29,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514817896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:29,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940090682] [2021-12-22 12:32:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:29,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:29,092 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) [2021-12-22 12:32:29,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 12:32:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:29,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 12:32:29,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:29,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940090682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:29,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:29,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:32:29,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167056067] [2021-12-22 12:32:29,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:29,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:29,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:29,501 INFO L87 Difference]: Start difference. First operand 26764 states and 41303 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 12:32:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:30,955 INFO L93 Difference]: Finished difference Result 75333 states and 115677 transitions. [2021-12-22 12:32:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:30,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-22 12:32:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:31,295 INFO L225 Difference]: With dead ends: 75333 [2021-12-22 12:32:31,311 INFO L226 Difference]: Without dead ends: 50702 [2021-12-22 12:32:31,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:31,426 INFO L933 BasicCegarLoop]: 4192 mSDtfsCounter, 4130 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4130 SdHoareTripleChecker+Valid, 4390 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:31,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4130 Valid, 4390 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50702 states. [2021-12-22 12:32:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50702 to 50308. [2021-12-22 12:32:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50308 states, 43566 states have (on average 1.4879493182757195) internal successors, (64824), 44084 states have internal predecessors, (64824), 4004 states have call successors, (4004), 2352 states have call predecessors, (4004), 2736 states have return successors, (7963), 3935 states have call predecessors, (7963), 4004 states have call successors, (7963) [2021-12-22 12:32:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50308 states to 50308 states and 76791 transitions. [2021-12-22 12:32:33,621 INFO L78 Accepts]: Start accepts. Automaton has 50308 states and 76791 transitions. Word has length 128 [2021-12-22 12:32:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:33,622 INFO L470 AbstractCegarLoop]: Abstraction has 50308 states and 76791 transitions. [2021-12-22 12:32:33,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 12:32:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 50308 states and 76791 transitions. [2021-12-22 12:32:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-22 12:32:33,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:33,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:33,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:33,927 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,SelfDestructingSolverStorable9 [2021-12-22 12:32:33,928 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:33,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:33,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-12-22 12:32:33,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:33,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743799652] [2021-12-22 12:32:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:33,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:33,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:33,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:33,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:34,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:34,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:34,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 12:32:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:34,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:34,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 12:32:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:32:34,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:34,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743799652] [2021-12-22 12:32:34,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743799652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:34,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603208725] [2021-12-22 12:32:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:34,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:34,037 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) [2021-12-22 12:32:34,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 12:32:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:34,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 12:32:34,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:34,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603208725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:34,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:34,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:32:34,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325253142] [2021-12-22 12:32:34,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:34,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:34,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:34,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:34,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:34,306 INFO L87 Difference]: Start difference. First operand 50308 states and 76791 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:32:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:37,659 INFO L93 Difference]: Finished difference Result 144685 states and 222029 transitions. [2021-12-22 12:32:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:37,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2021-12-22 12:32:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:38,323 INFO L225 Difference]: With dead ends: 144685 [2021-12-22 12:32:38,324 INFO L226 Difference]: Without dead ends: 96511 [2021-12-22 12:32:38,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:38,443 INFO L933 BasicCegarLoop]: 4382 mSDtfsCounter, 194 mSDsluCounter, 4180 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 8562 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:38,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 8562 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96511 states. [2021-12-22 12:32:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96511 to 96511. [2021-12-22 12:32:42,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96511 states, 83294 states have (on average 1.4710663433140443) internal successors, (122531), 84197 states have internal predecessors, (122531), 7743 states have call successors, (7743), 4704 states have call predecessors, (7743), 5472 states have return successors, (17046), 7737 states have call predecessors, (17046), 7743 states have call successors, (17046) [2021-12-22 12:32:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96511 states to 96511 states and 147320 transitions. [2021-12-22 12:32:43,560 INFO L78 Accepts]: Start accepts. Automaton has 96511 states and 147320 transitions. Word has length 128 [2021-12-22 12:32:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:32:43,566 INFO L470 AbstractCegarLoop]: Abstraction has 96511 states and 147320 transitions. [2021-12-22 12:32:43,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 12:32:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 96511 states and 147320 transitions. [2021-12-22 12:32:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-22 12:32:43,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:32:43,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:32:44,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 12:32:44,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:44,219 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:32:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:32:44,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-12-22 12:32:44,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:32:44,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080816823] [2021-12-22 12:32:44,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:44,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:32:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:32:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:32:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:32:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:32:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:32:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 12:32:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:32:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:32:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-22 12:32:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-22 12:32:44,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:32:44,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080816823] [2021-12-22 12:32:44,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080816823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:32:44,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250617917] [2021-12-22 12:32:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:32:44,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:32:44,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:32:44,420 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) [2021-12-22 12:32:44,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 12:32:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:32:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:32:44,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:32:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 12:32:44,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:32:44,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250617917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:32:44,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:32:44,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:32:44,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843726785] [2021-12-22 12:32:44,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:32:44,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:32:44,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:32:44,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:32:44,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:44,889 INFO L87 Difference]: Start difference. First operand 96511 states and 147320 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:32:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:32:51,544 INFO L93 Difference]: Finished difference Result 280463 states and 429619 transitions. [2021-12-22 12:32:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:32:51,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-12-22 12:32:51,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:32:52,524 INFO L225 Difference]: With dead ends: 280463 [2021-12-22 12:32:52,524 INFO L226 Difference]: Without dead ends: 186091 [2021-12-22 12:32:52,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:32:52,789 INFO L933 BasicCegarLoop]: 4201 mSDtfsCounter, 4086 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4086 SdHoareTripleChecker+Valid, 4399 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:32:52,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4086 Valid, 4399 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:32:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186091 states. [2021-12-22 12:33:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186091 to 184521. [2021-12-22 12:33:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184521 states, 159460 states have (on average 1.465803336259877) internal successors, (233737), 161263 states have internal predecessors, (233737), 14405 states have call successors, (14405), 9118 states have call predecessors, (14405), 10654 states have return successors, (32274), 14267 states have call predecessors, (32274), 14405 states have call successors, (32274) [2021-12-22 12:33:02,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184521 states to 184521 states and 280416 transitions. [2021-12-22 12:33:02,127 INFO L78 Accepts]: Start accepts. Automaton has 184521 states and 280416 transitions. Word has length 166 [2021-12-22 12:33:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:33:02,128 INFO L470 AbstractCegarLoop]: Abstraction has 184521 states and 280416 transitions. [2021-12-22 12:33:02,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:33:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 184521 states and 280416 transitions. [2021-12-22 12:33:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-22 12:33:02,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:33:02,632 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:33:02,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 12:33:02,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:33:02,850 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:33:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:33:02,851 INFO L85 PathProgramCache]: Analyzing trace with hash 399987983, now seen corresponding path program 1 times [2021-12-22 12:33:02,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:33:02,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636675942] [2021-12-22 12:33:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:33:02,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:33:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:02,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:33:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:02,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:33:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:33:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:02,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:33:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:02,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:33:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:02,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 12:33:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:02,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 12:33:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:03,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:33:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:03,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-22 12:33:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:03,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:33:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:03,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-22 12:33:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-22 12:33:03,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:33:03,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636675942] [2021-12-22 12:33:03,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636675942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:33:03,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942709902] [2021-12-22 12:33:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:33:03,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:33:03,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:33:03,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:33:03,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 12:33:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:33:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:33:03,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:33:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 12:33:03,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:33:03,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942709902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:33:03,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:33:03,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:33:03,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822563853] [2021-12-22 12:33:03,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:33:03,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:33:03,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:33:03,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:33:03,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:33:03,446 INFO L87 Difference]: Start difference. First operand 184521 states and 280416 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)