./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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_label47+token_ring.02.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e29588631802f33e276df8c8a4376435a271a426c8b5d54fd1eb814b142c7499 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:47:16,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:47:16,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:47:16,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:47:16,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:47:16,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:47:16,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:47:16,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:47:16,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:47:16,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:47:16,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:47:16,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:47:16,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:47:16,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:47:16,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:47:16,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:47:16,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:47:16,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:47:16,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:47:16,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:47:16,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:47:16,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:47:16,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:47:16,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:47:16,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:47:16,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:47:16,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:47:16,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:47:16,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:47:16,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:47:16,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:47:16,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:47:16,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:47:16,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:47:16,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:47:16,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:47:16,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:47:16,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:47:16,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:47:16,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:47:16,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:47:16,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:47:16,549 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:47:16,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:47:16,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:47:16,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:47:16,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:47:16,552 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:47:16,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:47:16,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:47:16,553 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:47:16,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:47:16,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:47:16,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:47:16,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:47:16,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:47:16,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:47:16,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:47:16,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:47:16,555 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:47:16,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:47:16,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:47:16,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:47:16,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:47:16,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:47:16,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:47:16,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:47:16,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:47:16,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:47:16,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:47:16,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:47:16,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:47:16,558 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:47:16,558 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:47:16,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:47:16,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:47:16,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e29588631802f33e276df8c8a4376435a271a426c8b5d54fd1eb814b142c7499 [2021-12-14 15:47:16,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:47:16,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:47:16,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:47:16,755 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:47:16,756 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:47:16,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c [2021-12-14 15:47:16,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33dbc41c0/feefdd4a61e4477c9f4e762ae8b71352/FLAGe2d54c222 [2021-12-14 15:47:17,475 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:47:17,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.02.cil-1.c [2021-12-14 15:47:17,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33dbc41c0/feefdd4a61e4477c9f4e762ae8b71352/FLAGe2d54c222 [2021-12-14 15:47:17,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33dbc41c0/feefdd4a61e4477c9f4e762ae8b71352 [2021-12-14 15:47:17,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:47:17,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:47:17,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:47:17,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:47:17,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:47:17,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:47:17" (1/1) ... [2021-12-14 15:47:17,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4468a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:17, skipping insertion in model container [2021-12-14 15:47:17,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:47:17" (1/1) ... [2021-12-14 15:47:17,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:47:17,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:47:19,209 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_label47+token_ring.02.cil-1.c[377612,377625] [2021-12-14 15:47:19,233 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_label47+token_ring.02.cil-1.c[383339,383352] [2021-12-14 15:47:19,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:47:19,368 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:47:20,038 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_label47+token_ring.02.cil-1.c[377612,377625] [2021-12-14 15:47:20,043 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_label47+token_ring.02.cil-1.c[383339,383352] [2021-12-14 15:47:20,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:47:20,106 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:47:20,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20 WrapperNode [2021-12-14 15:47:20,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:47:20,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:47:20,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:47:20,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:47:20,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,557 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-12-14 15:47:20,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:47:20,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:47:20,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:47:20,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:47:20,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:47:20,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:47:20,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:47:20,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:47:20,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (1/1) ... [2021-12-14 15:47:20,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:47:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:20,962 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) [2021-12-14 15:47:20,967 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 [2021-12-14 15:47:20,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:47:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 15:47:20,991 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 15:47:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 15:47:20,991 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 15:47:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 15:47:20,991 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 15:47:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 15:47:20,991 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 15:47:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 15:47:20,992 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 15:47:20,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:47:20,992 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 15:47:20,992 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 15:47:20,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:47:20,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:47:21,056 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:47:21,057 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:47:25,912 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:47:25,928 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:47:25,929 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-14 15:47:25,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:47:25 BoogieIcfgContainer [2021-12-14 15:47:25,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:47:25,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:47:25,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:47:25,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:47:25,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:47:17" (1/3) ... [2021-12-14 15:47:25,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707c4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:47:25, skipping insertion in model container [2021-12-14 15:47:25,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:47:20" (2/3) ... [2021-12-14 15:47:25,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@707c4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:47:25, skipping insertion in model container [2021-12-14 15:47:25,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:47:25" (3/3) ... [2021-12-14 15:47:25,939 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.02.cil-1.c [2021-12-14 15:47:25,942 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:47:25,942 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:47:25,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:47:25,985 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 [2021-12-14 15:47:25,985 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:47:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-14 15:47:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 15:47:26,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:26,029 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] [2021-12-14 15:47:26,029 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:26,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1170312139, now seen corresponding path program 1 times [2021-12-14 15:47:26,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:26,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086669105] [2021-12-14 15:47:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:26,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:26,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:26,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:26,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:26,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:26,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:47:26,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:26,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086669105] [2021-12-14 15:47:26,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086669105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:26,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:26,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:47:26,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647360870] [2021-12-14 15:47:26,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:26,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:47:26,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:47:26,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:47:26,390 INFO L87 Difference]: Start difference. First operand has 2315 states, 2290 states have (on average 1.8572052401746726) internal successors, (4253), 2293 states have internal predecessors, (4253), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-14 15:47:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:27,167 INFO L93 Difference]: Finished difference Result 4802 states and 8845 transitions. [2021-12-14 15:47:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:47:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 68 [2021-12-14 15:47:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:27,185 INFO L225 Difference]: With dead ends: 4802 [2021-12-14 15:47:27,185 INFO L226 Difference]: Without dead ends: 2427 [2021-12-14 15:47:27,191 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 [2021-12-14 15:47:27,193 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4428 mSDsluCounter, 12460 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 16708 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:27,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 16708 Invalid, 610 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 15:47:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-12-14 15:47:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2364. [2021-12-14 15:47:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2322 states have (on average 1.8333333333333333) internal successors, (4257), 2325 states have internal predecessors, (4257), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-14 15:47:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4314 transitions. [2021-12-14 15:47:27,287 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4314 transitions. Word has length 68 [2021-12-14 15:47:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:27,287 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4314 transitions. [2021-12-14 15:47:27,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-14 15:47:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4314 transitions. [2021-12-14 15:47:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 15:47:27,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:27,291 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] [2021-12-14 15:47:27,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:47:27,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1597321137, now seen corresponding path program 1 times [2021-12-14 15:47:27,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:27,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692474423] [2021-12-14 15:47:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:27,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:47:27,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:27,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692474423] [2021-12-14 15:47:27,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692474423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:27,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:27,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:27,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171188816] [2021-12-14 15:47:27,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:27,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:27,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:27,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:27,378 INFO L87 Difference]: Start difference. First operand 2364 states and 4314 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-14 15:47:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:27,758 INFO L93 Difference]: Finished difference Result 2662 states and 4765 transitions. [2021-12-14 15:47:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:47:27,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-14 15:47:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:27,766 INFO L225 Difference]: With dead ends: 2662 [2021-12-14 15:47:27,767 INFO L226 Difference]: Without dead ends: 2429 [2021-12-14 15:47:27,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:47:27,769 INFO L933 BasicCegarLoop]: 4130 mSDtfsCounter, 4303 mSDsluCounter, 12105 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4313 SdHoareTripleChecker+Valid, 16235 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:27,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4313 Valid, 16235 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 15:47:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-12-14 15:47:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2364. [2021-12-14 15:47:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2322 states have (on average 1.8324720068906115) internal successors, (4255), 2325 states have internal predecessors, (4255), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-14 15:47:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4312 transitions. [2021-12-14 15:47:27,810 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4312 transitions. Word has length 68 [2021-12-14 15:47:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:27,810 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4312 transitions. [2021-12-14 15:47:27,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-14 15:47:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4312 transitions. [2021-12-14 15:47:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 15:47:27,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:27,812 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] [2021-12-14 15:47:27,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:47:27,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:27,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:27,813 INFO L85 PathProgramCache]: Analyzing trace with hash -721302131, now seen corresponding path program 1 times [2021-12-14 15:47:27,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:27,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467661635] [2021-12-14 15:47:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:27,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:47:27,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:27,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467661635] [2021-12-14 15:47:27,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467661635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:27,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:27,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:27,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990817673] [2021-12-14 15:47:27,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:27,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:27,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:27,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:27,887 INFO L87 Difference]: Start difference. First operand 2364 states and 4312 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-14 15:47:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:28,587 INFO L93 Difference]: Finished difference Result 2803 states and 4960 transitions. [2021-12-14 15:47:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:47:28,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-14 15:47:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:28,596 INFO L225 Difference]: With dead ends: 2803 [2021-12-14 15:47:28,596 INFO L226 Difference]: Without dead ends: 2570 [2021-12-14 15:47:28,598 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 [2021-12-14 15:47:28,599 INFO L933 BasicCegarLoop]: 4178 mSDtfsCounter, 4371 mSDsluCounter, 16296 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4380 SdHoareTripleChecker+Valid, 20474 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:28,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4380 Valid, 20474 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 15:47:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-12-14 15:47:28,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2473. [2021-12-14 15:47:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2413 states have (on average 1.8176543721508496) internal successors, (4386), 2417 states have internal predecessors, (4386), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-14 15:47:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 4467 transitions. [2021-12-14 15:47:28,746 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 4467 transitions. Word has length 68 [2021-12-14 15:47:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:28,747 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 4467 transitions. [2021-12-14 15:47:28,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-14 15:47:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 4467 transitions. [2021-12-14 15:47:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 15:47:28,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:28,752 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] [2021-12-14 15:47:28,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:47:28,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:28,755 INFO L85 PathProgramCache]: Analyzing trace with hash -277401457, now seen corresponding path program 1 times [2021-12-14 15:47:28,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:28,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225204850] [2021-12-14 15:47:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:28,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:47:28,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:28,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225204850] [2021-12-14 15:47:28,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225204850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:28,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:28,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:28,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45056731] [2021-12-14 15:47:28,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:28,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:28,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:28,908 INFO L87 Difference]: Start difference. First operand 2473 states and 4467 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-14 15:47:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:29,866 INFO L93 Difference]: Finished difference Result 3234 states and 5585 transitions. [2021-12-14 15:47:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:47:29,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-14 15:47:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:29,884 INFO L225 Difference]: With dead ends: 3234 [2021-12-14 15:47:29,884 INFO L226 Difference]: Without dead ends: 2892 [2021-12-14 15:47:29,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:47:29,895 INFO L933 BasicCegarLoop]: 4253 mSDtfsCounter, 4357 mSDsluCounter, 16449 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4365 SdHoareTripleChecker+Valid, 20702 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:29,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4365 Valid, 20702 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:47:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-12-14 15:47:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2680. [2021-12-14 15:47:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2586 states have (on average 1.7931167826759473) internal successors, (4637), 2592 states have internal predecessors, (4637), 58 states have call successors, (58), 30 states have call predecessors, (58), 34 states have return successors, (71), 61 states have call predecessors, (71), 58 states have call successors, (71) [2021-12-14 15:47:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 4766 transitions. [2021-12-14 15:47:29,961 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 4766 transitions. Word has length 68 [2021-12-14 15:47:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:29,961 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 4766 transitions. [2021-12-14 15:47:29,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-14 15:47:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 4766 transitions. [2021-12-14 15:47:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 15:47:29,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:29,966 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] [2021-12-14 15:47:29,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:47:29,966 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1988979729, now seen corresponding path program 1 times [2021-12-14 15:47:29,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:29,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547529057] [2021-12-14 15:47:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:29,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:47:30,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547529057] [2021-12-14 15:47:30,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547529057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:30,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:30,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:47:30,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241361425] [2021-12-14 15:47:30,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:30,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:47:30,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:30,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:47:30,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:47:30,050 INFO L87 Difference]: Start difference. First operand 2680 states and 4766 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-14 15:47:30,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:30,687 INFO L93 Difference]: Finished difference Result 3933 states and 6590 transitions. [2021-12-14 15:47:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:47:30,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 68 [2021-12-14 15:47:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:30,697 INFO L225 Difference]: With dead ends: 3933 [2021-12-14 15:47:30,697 INFO L226 Difference]: Without dead ends: 3384 [2021-12-14 15:47:30,699 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 [2021-12-14 15:47:30,699 INFO L933 BasicCegarLoop]: 4222 mSDtfsCounter, 4359 mSDsluCounter, 16452 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4371 SdHoareTripleChecker+Valid, 20674 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:30,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4371 Valid, 20674 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:47:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-12-14 15:47:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3099. [2021-12-14 15:47:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2939 states have (on average 1.7526369513439946) internal successors, (5151), 2949 states have internal predecessors, (5151), 96 states have call successors, (96), 54 states have call predecessors, (96), 62 states have return successors, (131), 103 states have call predecessors, (131), 96 states have call successors, (131) [2021-12-14 15:47:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 5378 transitions. [2021-12-14 15:47:30,763 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 5378 transitions. Word has length 68 [2021-12-14 15:47:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:30,763 INFO L470 AbstractCegarLoop]: Abstraction has 3099 states and 5378 transitions. [2021-12-14 15:47:30,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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) [2021-12-14 15:47:30,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 5378 transitions. [2021-12-14 15:47:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 15:47:30,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:30,765 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] [2021-12-14 15:47:30,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:47:30,765 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1507899471, now seen corresponding path program 1 times [2021-12-14 15:47:30,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:30,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579746450] [2021-12-14 15:47:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:30,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:47:30,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:30,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579746450] [2021-12-14 15:47:30,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579746450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:30,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:30,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:47:30,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620289299] [2021-12-14 15:47:30,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:30,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:47:30,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:47:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:47:30,820 INFO L87 Difference]: Start difference. First operand 3099 states and 5378 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-14 15:47:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:31,373 INFO L93 Difference]: Finished difference Result 4926 states and 8067 transitions. [2021-12-14 15:47:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:47:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 68 [2021-12-14 15:47:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:31,384 INFO L225 Difference]: With dead ends: 4926 [2021-12-14 15:47:31,384 INFO L226 Difference]: Without dead ends: 3959 [2021-12-14 15:47:31,387 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 [2021-12-14 15:47:31,387 INFO L933 BasicCegarLoop]: 4292 mSDtfsCounter, 4487 mSDsluCounter, 12256 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4513 SdHoareTripleChecker+Valid, 16548 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:31,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4513 Valid, 16548 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:47:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-12-14 15:47:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3628. [2021-12-14 15:47:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3380 states have (on average 1.7079881656804734) internal successors, (5773), 3399 states have internal predecessors, (5773), 150 states have call successors, (150), 84 states have call predecessors, (150), 96 states have return successors, (195), 152 states have call predecessors, (195), 150 states have call successors, (195) [2021-12-14 15:47:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 6118 transitions. [2021-12-14 15:47:31,459 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 6118 transitions. Word has length 68 [2021-12-14 15:47:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:31,459 INFO L470 AbstractCegarLoop]: Abstraction has 3628 states and 6118 transitions. [2021-12-14 15:47:31,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-12-14 15:47:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 6118 transitions. [2021-12-14 15:47:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 15:47:31,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:31,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:47:31,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:47:31,462 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:31,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1262348608, now seen corresponding path program 1 times [2021-12-14 15:47:31,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:31,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766983656] [2021-12-14 15:47:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:31,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:47:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 15:47:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:47:31,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766983656] [2021-12-14 15:47:31,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766983656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:31,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041679428] [2021-12-14 15:47:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:31,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:31,546 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) [2021-12-14 15:47:31,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:47:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:31,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 15:47:31,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:31,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041679428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:31,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:31,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:47:31,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158417873] [2021-12-14 15:47:31,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:31,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:31,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:31,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:31,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:31,804 INFO L87 Difference]: Start difference. First operand 3628 states and 6118 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-12-14 15:47:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:31,980 INFO L93 Difference]: Finished difference Result 6543 states and 10338 transitions. [2021-12-14 15:47:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 110 [2021-12-14 15:47:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:31,994 INFO L225 Difference]: With dead ends: 6543 [2021-12-14 15:47:31,994 INFO L226 Difference]: Without dead ends: 5047 [2021-12-14 15:47:31,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:31,998 INFO L933 BasicCegarLoop]: 4149 mSDtfsCounter, 4097 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 4307 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 [2021-12-14 15:47:31,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4097 Valid, 4307 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:32,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2021-12-14 15:47:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 5017. [2021-12-14 15:47:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5017 states, 4545 states have (on average 1.6387238723872388) internal successors, (7448), 4581 states have internal predecessors, (7448), 280 states have call successors, (280), 166 states have call predecessors, (280), 190 states have return successors, (363), 277 states have call predecessors, (363), 280 states have call successors, (363) [2021-12-14 15:47:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5017 states to 5017 states and 8091 transitions. [2021-12-14 15:47:32,102 INFO L78 Accepts]: Start accepts. Automaton has 5017 states and 8091 transitions. Word has length 110 [2021-12-14 15:47:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:32,102 INFO L470 AbstractCegarLoop]: Abstraction has 5017 states and 8091 transitions. [2021-12-14 15:47:32,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-12-14 15:47:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 5017 states and 8091 transitions. [2021-12-14 15:47:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 15:47:32,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:32,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:47:32,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:32,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:32,323 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1095009120, now seen corresponding path program 1 times [2021-12-14 15:47:32,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:32,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790020377] [2021-12-14 15:47:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:32,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:47:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 15:47:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:47:32,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:32,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790020377] [2021-12-14 15:47:32,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790020377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:32,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519825973] [2021-12-14 15:47:32,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:32,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:32,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:32,423 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) [2021-12-14 15:47:32,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 15:47:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:32,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 15:47:32,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:32,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519825973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:32,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:32,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:32,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971350823] [2021-12-14 15:47:32,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:32,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:32,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:32,637 INFO L87 Difference]: Start difference. First operand 5017 states and 8091 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-12-14 15:47:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:32,766 INFO L93 Difference]: Finished difference Result 10629 states and 16263 transitions. [2021-12-14 15:47:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 110 [2021-12-14 15:47:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:32,786 INFO L225 Difference]: With dead ends: 10629 [2021-12-14 15:47:32,786 INFO L226 Difference]: Without dead ends: 7745 [2021-12-14 15:47:32,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:32,793 INFO L933 BasicCegarLoop]: 4297 mSDtfsCounter, 153 mSDsluCounter, 4137 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 8434 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 [2021-12-14 15:47:32,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 8434 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7745 states. [2021-12-14 15:47:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7745 to 7745. [2021-12-14 15:47:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7745 states, 6832 states have (on average 1.5654274004683841) internal successors, (10695), 6893 states have internal predecessors, (10695), 535 states have call successors, (535), 328 states have call predecessors, (535), 376 states have return successors, (786), 539 states have call predecessors, (786), 535 states have call successors, (786) [2021-12-14 15:47:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7745 states to 7745 states and 12016 transitions. [2021-12-14 15:47:32,966 INFO L78 Accepts]: Start accepts. Automaton has 7745 states and 12016 transitions. Word has length 110 [2021-12-14 15:47:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:32,967 INFO L470 AbstractCegarLoop]: Abstraction has 7745 states and 12016 transitions. [2021-12-14 15:47:32,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-12-14 15:47:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 7745 states and 12016 transitions. [2021-12-14 15:47:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-14 15:47:32,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:32,976 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 15:47:33,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:33,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-14 15:47:33,201 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1627368555, now seen corresponding path program 1 times [2021-12-14 15:47:33,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:33,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601720012] [2021-12-14 15:47:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:33,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:47:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 15:47:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-14 15:47:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 15:47:33,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601720012] [2021-12-14 15:47:33,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601720012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181637553] [2021-12-14 15:47:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:33,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:33,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:33,273 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) [2021-12-14 15:47:33,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 15:47:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:33,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:33,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 15:47:33,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:33,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181637553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:33,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:33,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:47:33,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375040459] [2021-12-14 15:47:33,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:33,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:33,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:33,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:33,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:33,581 INFO L87 Difference]: Start difference. First operand 7745 states and 12016 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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) [2021-12-14 15:47:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:33,967 INFO L93 Difference]: Finished difference Result 18721 states and 27923 transitions. [2021-12-14 15:47:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:33,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 142 [2021-12-14 15:47:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:33,998 INFO L225 Difference]: With dead ends: 18721 [2021-12-14 15:47:33,999 INFO L226 Difference]: Without dead ends: 13113 [2021-12-14 15:47:34,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:34,015 INFO L933 BasicCegarLoop]: 4158 mSDtfsCounter, 4055 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4055 SdHoareTripleChecker+Valid, 4316 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 [2021-12-14 15:47:34,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4055 Valid, 4316 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2021-12-14 15:47:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 12999. [2021-12-14 15:47:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 11234 states have (on average 1.5087235178921132) internal successors, (16949), 11353 states have internal predecessors, (16949), 1021 states have call successors, (1021), 646 states have call predecessors, (1021), 742 states have return successors, (1484), 1015 states have call predecessors, (1484), 1021 states have call successors, (1484) [2021-12-14 15:47:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 19454 transitions. [2021-12-14 15:47:34,314 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 19454 transitions. Word has length 142 [2021-12-14 15:47:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:34,314 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 19454 transitions. [2021-12-14 15:47:34,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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) [2021-12-14 15:47:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 19454 transitions. [2021-12-14 15:47:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 15:47:34,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:34,333 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, 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] [2021-12-14 15:47:34,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:34,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:34,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:34,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2072719309, now seen corresponding path program 1 times [2021-12-14 15:47:34,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:34,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897452875] [2021-12-14 15:47:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:34,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 15:47:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 15:47:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 15:47:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 15:47:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 15:47:34,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897452875] [2021-12-14 15:47:34,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897452875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689164682] [2021-12-14 15:47:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:34,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:34,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:34,652 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) [2021-12-14 15:47:34,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 15:47:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:34,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:34,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 15:47:34,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:34,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689164682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:34,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:34,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:34,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147008209] [2021-12-14 15:47:34,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:34,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:34,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:34,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:34,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:34,972 INFO L87 Difference]: Start difference. First operand 12999 states and 19454 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-12-14 15:47:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:35,338 INFO L93 Difference]: Finished difference Result 25137 states and 37098 transitions. [2021-12-14 15:47:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) Word has length 159 [2021-12-14 15:47:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:35,374 INFO L225 Difference]: With dead ends: 25137 [2021-12-14 15:47:35,374 INFO L226 Difference]: Without dead ends: 14273 [2021-12-14 15:47:35,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:35,401 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 4074 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4074 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:35,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4074 Valid, 4170 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14273 states. [2021-12-14 15:47:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14273 to 14273. [2021-12-14 15:47:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 12392 states have (on average 1.452792123950936) internal successors, (18003), 12511 states have internal predecessors, (18003), 1051 states have call successors, (1051), 732 states have call predecessors, (1051), 828 states have return successors, (1522), 1045 states have call predecessors, (1522), 1051 states have call successors, (1522) [2021-12-14 15:47:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 20576 transitions. [2021-12-14 15:47:35,868 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 20576 transitions. Word has length 159 [2021-12-14 15:47:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:35,869 INFO L470 AbstractCegarLoop]: Abstraction has 14273 states and 20576 transitions. [2021-12-14 15:47:35,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-12-14 15:47:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 20576 transitions. [2021-12-14 15:47:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 15:47:35,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:35,891 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, 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] [2021-12-14 15:47:35,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:36,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:36,109 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -830749066, now seen corresponding path program 1 times [2021-12-14 15:47:36,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:36,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615509411] [2021-12-14 15:47:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:36,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 15:47:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 15:47:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 15:47:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 15:47:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 15:47:36,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615509411] [2021-12-14 15:47:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615509411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764419087] [2021-12-14 15:47:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:36,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:36,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:36,208 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) [2021-12-14 15:47:36,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 15:47:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:47:36,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 15:47:36,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:36,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764419087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:36,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:36,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:36,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888273333] [2021-12-14 15:47:36,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:36,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:36,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:36,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:36,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:36,517 INFO L87 Difference]: Start difference. First operand 14273 states and 20576 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:47:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:36,882 INFO L93 Difference]: Finished difference Result 23524 states and 33192 transitions. [2021-12-14 15:47:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:36,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2021-12-14 15:47:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:36,923 INFO L225 Difference]: With dead ends: 23524 [2021-12-14 15:47:36,923 INFO L226 Difference]: Without dead ends: 15133 [2021-12-14 15:47:37,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:37,084 INFO L933 BasicCegarLoop]: 4158 mSDtfsCounter, 4087 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4323 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:37,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 4323 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15133 states. [2021-12-14 15:47:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15133 to 15057. [2021-12-14 15:47:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15057 states, 13112 states have (on average 1.4276235509456987) internal successors, (18719), 13231 states have internal predecessors, (18719), 1063 states have call successors, (1063), 784 states have call predecessors, (1063), 880 states have return successors, (1586), 1057 states have call predecessors, (1586), 1063 states have call successors, (1586) [2021-12-14 15:47:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15057 states to 15057 states and 21368 transitions. [2021-12-14 15:47:37,490 INFO L78 Accepts]: Start accepts. Automaton has 15057 states and 21368 transitions. Word has length 159 [2021-12-14 15:47:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:37,490 INFO L470 AbstractCegarLoop]: Abstraction has 15057 states and 21368 transitions. [2021-12-14 15:47:37,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:47:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15057 states and 21368 transitions. [2021-12-14 15:47:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-14 15:47:37,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:37,511 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, 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] [2021-12-14 15:47:37,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:37,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 15:47:37,740 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash -609804947, now seen corresponding path program 1 times [2021-12-14 15:47:37,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:37,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961207779] [2021-12-14 15:47:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:37,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 15:47:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:47:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 15:47:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:47:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-14 15:47:37,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:37,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961207779] [2021-12-14 15:47:37,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961207779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:37,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036146693] [2021-12-14 15:47:37,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:37,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:37,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:37,828 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:37,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 15:47:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:47:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 15:47:38,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:38,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036146693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:38,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:38,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:38,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711867119] [2021-12-14 15:47:38,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:38,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:38,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:38,123 INFO L87 Difference]: Start difference. First operand 15057 states and 21368 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:47:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:38,638 INFO L93 Difference]: Finished difference Result 39229 states and 54558 transitions. [2021-12-14 15:47:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-14 15:47:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:38,717 INFO L225 Difference]: With dead ends: 39229 [2021-12-14 15:47:38,717 INFO L226 Difference]: Without dead ends: 26311 [2021-12-14 15:47:38,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:38,750 INFO L933 BasicCegarLoop]: 4171 mSDtfsCounter, 4101 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4101 SdHoareTripleChecker+Valid, 4332 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:38,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4101 Valid, 4332 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26311 states. [2021-12-14 15:47:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26311 to 25917. [2021-12-14 15:47:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25917 states, 22254 states have (on average 1.3840657859261256) internal successors, (30801), 22491 states have internal predecessors, (30801), 2013 states have call successors, (2013), 1456 states have call predecessors, (2013), 1648 states have return successors, (3594), 2001 states have call predecessors, (3594), 2013 states have call successors, (3594) [2021-12-14 15:47:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25917 states to 25917 states and 36408 transitions. [2021-12-14 15:47:39,585 INFO L78 Accepts]: Start accepts. Automaton has 25917 states and 36408 transitions. Word has length 160 [2021-12-14 15:47:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:39,586 INFO L470 AbstractCegarLoop]: Abstraction has 25917 states and 36408 transitions. [2021-12-14 15:47:39,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:47:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25917 states and 36408 transitions. [2021-12-14 15:47:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-14 15:47:39,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:39,634 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, 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] [2021-12-14 15:47:39,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:39,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:39,851 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:39,852 INFO L85 PathProgramCache]: Analyzing trace with hash -757749610, now seen corresponding path program 1 times [2021-12-14 15:47:39,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:39,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740766889] [2021-12-14 15:47:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:39,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 15:47:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:47:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:47:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:47:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 15:47:39,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:39,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740766889] [2021-12-14 15:47:39,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740766889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:39,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219736776] [2021-12-14 15:47:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:39,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:39,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:39,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:39,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 15:47:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 15:47:40,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:40,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219736776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:40,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:40,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:40,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036537221] [2021-12-14 15:47:40,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:40,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:40,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:40,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:40,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:40,258 INFO L87 Difference]: Start difference. First operand 25917 states and 36408 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:47:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:40,868 INFO L93 Difference]: Finished difference Result 43629 states and 61363 transitions. [2021-12-14 15:47:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:40,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-14 15:47:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:40,924 INFO L225 Difference]: With dead ends: 43629 [2021-12-14 15:47:40,924 INFO L226 Difference]: Without dead ends: 24283 [2021-12-14 15:47:40,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:40,951 INFO L933 BasicCegarLoop]: 4135 mSDtfsCounter, 4088 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4168 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:40,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 4168 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24283 states. [2021-12-14 15:47:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24283 to 18907. [2021-12-14 15:47:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18907 states, 16412 states have (on average 1.364550329027541) internal successors, (22395), 16541 states have internal predecessors, (22395), 1365 states have call successors, (1365), 1032 states have call predecessors, (1365), 1128 states have return successors, (2238), 1349 states have call predecessors, (2238), 1365 states have call successors, (2238) [2021-12-14 15:47:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18907 states to 18907 states and 25998 transitions. [2021-12-14 15:47:41,528 INFO L78 Accepts]: Start accepts. Automaton has 18907 states and 25998 transitions. Word has length 160 [2021-12-14 15:47:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:41,528 INFO L470 AbstractCegarLoop]: Abstraction has 18907 states and 25998 transitions. [2021-12-14 15:47:41,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:47:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 18907 states and 25998 transitions. [2021-12-14 15:47:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-14 15:47:41,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:41,548 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, 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] [2021-12-14 15:47:41,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:41,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:41,765 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:41,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1793650834, now seen corresponding path program 1 times [2021-12-14 15:47:41,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:41,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958318428] [2021-12-14 15:47:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:41,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 15:47:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:47:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:47:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:47:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 15:47:41,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:41,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958318428] [2021-12-14 15:47:41,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958318428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:41,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522293880] [2021-12-14 15:47:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:41,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:41,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:41,868 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:41,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 15:47:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:47:41,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 15:47:42,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:42,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522293880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:42,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:42,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:42,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740998761] [2021-12-14 15:47:42,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:42,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:42,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:42,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:42,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:42,177 INFO L87 Difference]: Start difference. First operand 18907 states and 25998 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:47:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:43,419 INFO L93 Difference]: Finished difference Result 50861 states and 68966 transitions. [2021-12-14 15:47:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-14 15:47:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:43,545 INFO L225 Difference]: With dead ends: 50861 [2021-12-14 15:47:43,545 INFO L226 Difference]: Without dead ends: 34101 [2021-12-14 15:47:43,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:43,593 INFO L933 BasicCegarLoop]: 4179 mSDtfsCounter, 4097 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 4339 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:43,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4097 Valid, 4339 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34101 states. [2021-12-14 15:47:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34101 to 33235. [2021-12-14 15:47:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33235 states, 28504 states have (on average 1.3202708391804658) internal successors, (37633), 28761 states have internal predecessors, (37633), 2601 states have call successors, (2601), 1936 states have call predecessors, (2601), 2128 states have return successors, (5060), 2569 states have call predecessors, (5060), 2601 states have call successors, (5060) [2021-12-14 15:47:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33235 states to 33235 states and 45294 transitions. [2021-12-14 15:47:45,039 INFO L78 Accepts]: Start accepts. Automaton has 33235 states and 45294 transitions. Word has length 160 [2021-12-14 15:47:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:45,040 INFO L470 AbstractCegarLoop]: Abstraction has 33235 states and 45294 transitions. [2021-12-14 15:47:45,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:47:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 33235 states and 45294 transitions. [2021-12-14 15:47:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-14 15:47:45,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:45,080 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, 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] [2021-12-14 15:47:45,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:45,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 15:47:45,303 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash -392345557, now seen corresponding path program 1 times [2021-12-14 15:47:45,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:45,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463103318] [2021-12-14 15:47:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:45,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 15:47:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:47:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 15:47:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:47:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-14 15:47:45,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:45,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463103318] [2021-12-14 15:47:45,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463103318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:45,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:45,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:47:45,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565083168] [2021-12-14 15:47:45,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:45,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:47:45,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:45,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:47:45,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:47:45,355 INFO L87 Difference]: Start difference. First operand 33235 states and 45294 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 15:47:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:46,426 INFO L93 Difference]: Finished difference Result 63233 states and 84327 transitions. [2021-12-14 15:47:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:47:46,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-14 15:47:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:46,505 INFO L225 Difference]: With dead ends: 63233 [2021-12-14 15:47:46,505 INFO L226 Difference]: Without dead ends: 32143 [2021-12-14 15:47:46,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:46,558 INFO L933 BasicCegarLoop]: 4134 mSDtfsCounter, 280 mSDsluCounter, 12008 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 16142 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:46,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 16142 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:47:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32143 states. [2021-12-14 15:47:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32143 to 30151. [2021-12-14 15:47:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30151 states, 26072 states have (on average 1.321762810678122) internal successors, (34461), 26585 states have internal predecessors, (34461), 1981 states have call successors, (1981), 1488 states have call predecessors, (1981), 2096 states have return successors, (4149), 2093 states have call predecessors, (4149), 1981 states have call successors, (4149) [2021-12-14 15:47:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30151 states to 30151 states and 40591 transitions. [2021-12-14 15:47:47,717 INFO L78 Accepts]: Start accepts. Automaton has 30151 states and 40591 transitions. Word has length 160 [2021-12-14 15:47:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:47,718 INFO L470 AbstractCegarLoop]: Abstraction has 30151 states and 40591 transitions. [2021-12-14 15:47:47,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 15:47:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 30151 states and 40591 transitions. [2021-12-14 15:47:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-14 15:47:47,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:47,764 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, 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] [2021-12-14 15:47:47,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 15:47:47,764 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash -809968940, now seen corresponding path program 1 times [2021-12-14 15:47:47,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:47,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481604628] [2021-12-14 15:47:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:47,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 15:47:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:47:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:47:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:47:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-14 15:47:47,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:47,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481604628] [2021-12-14 15:47:47,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481604628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:47,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:47:47,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:47:47,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997391395] [2021-12-14 15:47:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:47,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:47:47,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:47:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:47:47,834 INFO L87 Difference]: Start difference. First operand 30151 states and 40591 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 15:47:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:48,871 INFO L93 Difference]: Finished difference Result 52785 states and 69916 transitions. [2021-12-14 15:47:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:47:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 160 [2021-12-14 15:47:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:48,945 INFO L225 Difference]: With dead ends: 52785 [2021-12-14 15:47:48,945 INFO L226 Difference]: Without dead ends: 24771 [2021-12-14 15:47:48,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:48,988 INFO L933 BasicCegarLoop]: 4133 mSDtfsCounter, 280 mSDsluCounter, 12007 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 16140 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:48,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 16140 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:47:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24771 states. [2021-12-14 15:47:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24771 to 22913. [2021-12-14 15:47:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22913 states, 19932 states have (on average 1.3432169375877985) internal successors, (26773), 20291 states have internal predecessors, (26773), 1455 states have call successors, (1455), 1100 states have call predecessors, (1455), 1524 states have return successors, (2819), 1529 states have call predecessors, (2819), 1455 states have call successors, (2819) [2021-12-14 15:47:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22913 states to 22913 states and 31047 transitions. [2021-12-14 15:47:50,050 INFO L78 Accepts]: Start accepts. Automaton has 22913 states and 31047 transitions. Word has length 160 [2021-12-14 15:47:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:50,051 INFO L470 AbstractCegarLoop]: Abstraction has 22913 states and 31047 transitions. [2021-12-14 15:47:50,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 15:47:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 22913 states and 31047 transitions. [2021-12-14 15:47:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-14 15:47:50,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:50,079 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, 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] [2021-12-14 15:47:50,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 15:47:50,079 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1498858591, now seen corresponding path program 1 times [2021-12-14 15:47:50,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:50,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121077040] [2021-12-14 15:47:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:50,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:47:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 15:47:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:47:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-14 15:47:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 15:47:50,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121077040] [2021-12-14 15:47:50,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121077040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477460904] [2021-12-14 15:47:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:50,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:50,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:50,184 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:50,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 15:47:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:50,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:47:50,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 15:47:50,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:50,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477460904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:50,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:50,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:50,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127363030] [2021-12-14 15:47:50,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:50,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:50,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:50,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:50,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:50,512 INFO L87 Difference]: Start difference. First operand 22913 states and 31047 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:47:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:51,360 INFO L93 Difference]: Finished difference Result 36753 states and 50507 transitions. [2021-12-14 15:47:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:51,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-14 15:47:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:51,416 INFO L225 Difference]: With dead ends: 36753 [2021-12-14 15:47:51,416 INFO L226 Difference]: Without dead ends: 23011 [2021-12-14 15:47:51,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:51,445 INFO L933 BasicCegarLoop]: 4265 mSDtfsCounter, 129 mSDsluCounter, 4114 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 8379 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:51,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 8379 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23011 states. [2021-12-14 15:47:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23011 to 22913. [2021-12-14 15:47:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22913 states, 19932 states have (on average 1.3233493879189244) internal successors, (26377), 20291 states have internal predecessors, (26377), 1455 states have call successors, (1455), 1100 states have call predecessors, (1455), 1524 states have return successors, (2819), 1529 states have call predecessors, (2819), 1455 states have call successors, (2819) [2021-12-14 15:47:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22913 states to 22913 states and 30651 transitions. [2021-12-14 15:47:52,294 INFO L78 Accepts]: Start accepts. Automaton has 22913 states and 30651 transitions. Word has length 162 [2021-12-14 15:47:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:52,294 INFO L470 AbstractCegarLoop]: Abstraction has 22913 states and 30651 transitions. [2021-12-14 15:47:52,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:47:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 22913 states and 30651 transitions. [2021-12-14 15:47:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-14 15:47:52,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:52,317 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, 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] [2021-12-14 15:47:52,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:52,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 15:47:52,534 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1871536255, now seen corresponding path program 1 times [2021-12-14 15:47:52,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:52,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252055413] [2021-12-14 15:47:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:52,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:47:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 15:47:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:47:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-14 15:47:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 15:47:52,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:52,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252055413] [2021-12-14 15:47:52,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252055413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:52,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723567751] [2021-12-14 15:47:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:52,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:52,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:52,684 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:52,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 15:47:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:52,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:52,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 15:47:52,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:52,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723567751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:52,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:52,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:52,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533582927] [2021-12-14 15:47:52,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:52,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:52,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:52,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:52,971 INFO L87 Difference]: Start difference. First operand 22913 states and 30651 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:47:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:53,682 INFO L93 Difference]: Finished difference Result 40677 states and 54485 transitions. [2021-12-14 15:47:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:53,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2021-12-14 15:47:53,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:53,740 INFO L225 Difference]: With dead ends: 40677 [2021-12-14 15:47:53,741 INFO L226 Difference]: Without dead ends: 21107 [2021-12-14 15:47:53,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:53,777 INFO L933 BasicCegarLoop]: 4134 mSDtfsCounter, 4109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4109 SdHoareTripleChecker+Valid, 4166 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:53,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4109 Valid, 4166 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21107 states. [2021-12-14 15:47:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21107 to 20341. [2021-12-14 15:47:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20341 states, 17776 states have (on average 1.2984360936093609) internal successors, (23081), 18072 states have internal predecessors, (23081), 1259 states have call successors, (1259), 952 states have call predecessors, (1259), 1304 states have return successors, (2297), 1320 states have call predecessors, (2297), 1259 states have call successors, (2297) [2021-12-14 15:47:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20341 states to 20341 states and 26637 transitions. [2021-12-14 15:47:54,722 INFO L78 Accepts]: Start accepts. Automaton has 20341 states and 26637 transitions. Word has length 162 [2021-12-14 15:47:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:54,723 INFO L470 AbstractCegarLoop]: Abstraction has 20341 states and 26637 transitions. [2021-12-14 15:47:54,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:47:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 20341 states and 26637 transitions. [2021-12-14 15:47:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-14 15:47:54,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:54,737 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, 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] [2021-12-14 15:47:54,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-14 15:47:54,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 15:47:54,952 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:54,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1892311936, now seen corresponding path program 1 times [2021-12-14 15:47:54,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:54,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329542891] [2021-12-14 15:47:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:54,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:54,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:54,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:47:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 15:47:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 15:47:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-14 15:47:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-14 15:47:55,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329542891] [2021-12-14 15:47:55,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329542891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970736304] [2021-12-14 15:47:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:55,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:55,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:55,111 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:55,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 15:47:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:55,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:47:55,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 15:47:55,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:55,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970736304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:55,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:55,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:55,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857200201] [2021-12-14 15:47:55,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:55,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:55,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:55,420 INFO L87 Difference]: Start difference. First operand 20341 states and 26637 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:47:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:56,192 INFO L93 Difference]: Finished difference Result 33349 states and 43971 transitions. [2021-12-14 15:47:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:56,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-14 15:47:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:56,233 INFO L225 Difference]: With dead ends: 33349 [2021-12-14 15:47:56,234 INFO L226 Difference]: Without dead ends: 20431 [2021-12-14 15:47:56,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:56,251 INFO L933 BasicCegarLoop]: 4269 mSDtfsCounter, 122 mSDsluCounter, 4113 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 8382 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:56,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 8382 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20431 states. [2021-12-14 15:47:56,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20431 to 20341. [2021-12-14 15:47:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20341 states, 17776 states have (on average 1.2742461746174618) internal successors, (22651), 18072 states have internal predecessors, (22651), 1259 states have call successors, (1259), 952 states have call predecessors, (1259), 1304 states have return successors, (2297), 1320 states have call predecessors, (2297), 1259 states have call successors, (2297) [2021-12-14 15:47:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20341 states to 20341 states and 26207 transitions. [2021-12-14 15:47:56,902 INFO L78 Accepts]: Start accepts. Automaton has 20341 states and 26207 transitions. Word has length 162 [2021-12-14 15:47:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:56,903 INFO L470 AbstractCegarLoop]: Abstraction has 20341 states and 26207 transitions. [2021-12-14 15:47:56,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:47:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 20341 states and 26207 transitions. [2021-12-14 15:47:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 15:47:56,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:56,917 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, 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] [2021-12-14 15:47:56,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:57,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:57,134 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1316943992, now seen corresponding path program 1 times [2021-12-14 15:47:57,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:57,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294122942] [2021-12-14 15:47:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:57,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:47:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 15:47:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:47:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 15:47:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 15:47:57,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:57,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294122942] [2021-12-14 15:47:57,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294122942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:57,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144961409] [2021-12-14 15:47:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:57,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:57,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:57,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:57,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 15:47:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:57,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:47:57,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 15:47:57,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:57,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144961409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:57,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:57,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:57,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994416312] [2021-12-14 15:47:57,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:57,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:57,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:57,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:57,528 INFO L87 Difference]: Start difference. First operand 20341 states and 26207 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:47:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:47:58,152 INFO L93 Difference]: Finished difference Result 28874 states and 37303 transitions. [2021-12-14 15:47:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:47:58,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2021-12-14 15:47:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:47:58,204 INFO L225 Difference]: With dead ends: 28874 [2021-12-14 15:47:58,204 INFO L226 Difference]: Without dead ends: 20371 [2021-12-14 15:47:58,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:58,231 INFO L933 BasicCegarLoop]: 4245 mSDtfsCounter, 143 mSDsluCounter, 4117 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 8362 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:47:58,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 8362 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:47:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2021-12-14 15:47:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 20341. [2021-12-14 15:47:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20341 states, 17776 states have (on average 1.2653577857785778) internal successors, (22493), 18072 states have internal predecessors, (22493), 1259 states have call successors, (1259), 952 states have call predecessors, (1259), 1304 states have return successors, (2297), 1320 states have call predecessors, (2297), 1259 states have call successors, (2297) [2021-12-14 15:47:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20341 states to 20341 states and 26049 transitions. [2021-12-14 15:47:59,247 INFO L78 Accepts]: Start accepts. Automaton has 20341 states and 26049 transitions. Word has length 163 [2021-12-14 15:47:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:47:59,248 INFO L470 AbstractCegarLoop]: Abstraction has 20341 states and 26049 transitions. [2021-12-14 15:47:59,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:47:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 20341 states and 26049 transitions. [2021-12-14 15:47:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 15:47:59,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:47:59,265 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, 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] [2021-12-14 15:47:59,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 15:47:59,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:59,490 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:47:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:47:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1712947354, now seen corresponding path program 1 times [2021-12-14 15:47:59,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:47:59,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243041003] [2021-12-14 15:47:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:59,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:47:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:47:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:47:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:47:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:47:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:47:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:47:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 15:47:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 15:47:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:47:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 15:47:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-14 15:47:59,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:47:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243041003] [2021-12-14 15:47:59,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243041003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:47:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634346362] [2021-12-14 15:47:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:47:59,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:47:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:47:59,584 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:47:59,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 15:47:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:47:59,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:47:59,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:47:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 15:47:59,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:47:59,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634346362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:47:59,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:47:59,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:47:59,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996410700] [2021-12-14 15:47:59,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:47:59,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:47:59,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:47:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:47:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:47:59,888 INFO L87 Difference]: Start difference. First operand 20341 states and 26049 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:48:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:48:00,498 INFO L93 Difference]: Finished difference Result 33261 states and 41719 transitions. [2021-12-14 15:48:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:48:00,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 163 [2021-12-14 15:48:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:48:00,545 INFO L225 Difference]: With dead ends: 33261 [2021-12-14 15:48:00,545 INFO L226 Difference]: Without dead ends: 20343 [2021-12-14 15:48:00,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:48:00,570 INFO L933 BasicCegarLoop]: 4265 mSDtfsCounter, 124 mSDsluCounter, 4125 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 8390 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:48:00,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 8390 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:48:00,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20343 states. [2021-12-14 15:48:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20343 to 20341. [2021-12-14 15:48:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20341 states, 17776 states have (on average 1.2624887488748875) internal successors, (22442), 18072 states have internal predecessors, (22442), 1259 states have call successors, (1259), 952 states have call predecessors, (1259), 1304 states have return successors, (2276), 1320 states have call predecessors, (2276), 1259 states have call successors, (2276) [2021-12-14 15:48:01,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20341 states to 20341 states and 25977 transitions. [2021-12-14 15:48:01,393 INFO L78 Accepts]: Start accepts. Automaton has 20341 states and 25977 transitions. Word has length 163 [2021-12-14 15:48:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:48:01,393 INFO L470 AbstractCegarLoop]: Abstraction has 20341 states and 25977 transitions. [2021-12-14 15:48:01,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:48:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 20341 states and 25977 transitions. [2021-12-14 15:48:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-14 15:48:01,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:48:01,406 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, 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] [2021-12-14 15:48:01,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-14 15:48:01,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-14 15:48:01,614 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:48:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:48:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -349035639, now seen corresponding path program 1 times [2021-12-14 15:48:01,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:48:01,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330398971] [2021-12-14 15:48:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:01,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:48:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:48:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:48:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:48:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:48:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:48:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:48:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 15:48:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:48:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:48:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 15:48:01,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:48:01,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330398971] [2021-12-14 15:48:01,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330398971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:48:01,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932882368] [2021-12-14 15:48:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:01,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:01,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:48:01,694 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:48:01,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 15:48:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:01,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 15:48:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:48:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-14 15:48:02,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:48:02,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932882368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:48:02,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:48:02,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-14 15:48:02,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582757249] [2021-12-14 15:48:02,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:48:02,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:48:02,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:48:02,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:48:02,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 15:48:02,034 INFO L87 Difference]: Start difference. First operand 20341 states and 25977 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 15:48:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:48:02,934 INFO L93 Difference]: Finished difference Result 38507 states and 48102 transitions. [2021-12-14 15:48:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:48:02,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 164 [2021-12-14 15:48:02,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:48:02,982 INFO L225 Difference]: With dead ends: 38507 [2021-12-14 15:48:02,982 INFO L226 Difference]: Without dead ends: 20305 [2021-12-14 15:48:03,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:48:03,016 INFO L933 BasicCegarLoop]: 4109 mSDtfsCounter, 4132 mSDsluCounter, 8085 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 12194 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:48:03,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4141 Valid, 12194 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:48:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20305 states. [2021-12-14 15:48:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20305 to 20305. [2021-12-14 15:48:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20305 states, 17740 states have (on average 1.2474633596392333) internal successors, (22130), 18036 states have internal predecessors, (22130), 1259 states have call successors, (1259), 952 states have call predecessors, (1259), 1304 states have return successors, (2276), 1320 states have call predecessors, (2276), 1259 states have call successors, (2276) [2021-12-14 15:48:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20305 states to 20305 states and 25665 transitions. [2021-12-14 15:48:03,890 INFO L78 Accepts]: Start accepts. Automaton has 20305 states and 25665 transitions. Word has length 164 [2021-12-14 15:48:03,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:48:03,890 INFO L470 AbstractCegarLoop]: Abstraction has 20305 states and 25665 transitions. [2021-12-14 15:48:03,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 15:48:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 20305 states and 25665 transitions. [2021-12-14 15:48:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-14 15:48:03,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:48:03,904 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, 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] [2021-12-14 15:48:03,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-14 15:48:04,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:04,128 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:48:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:48:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1441670841, now seen corresponding path program 1 times [2021-12-14 15:48:04,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:48:04,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161603205] [2021-12-14 15:48:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:04,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:48:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:48:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:48:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:48:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:48:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:48:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:48:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 15:48:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:48:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:48:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 15:48:04,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:48:04,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161603205] [2021-12-14 15:48:04,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161603205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:48:04,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303481295] [2021-12-14 15:48:04,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:04,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:04,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:48:04,205 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:48:04,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 15:48:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:04,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 15:48:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:48:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-14 15:48:04,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:48:04,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303481295] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:48:04,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:48:04,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-14 15:48:04,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110430710] [2021-12-14 15:48:04,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:48:04,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:48:04,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:48:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:48:04,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:48:04,500 INFO L87 Difference]: Start difference. First operand 20305 states and 25665 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2021-12-14 15:48:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:48:05,191 INFO L93 Difference]: Finished difference Result 32632 states and 40743 transitions. [2021-12-14 15:48:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:48:05,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 164 [2021-12-14 15:48:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:48:05,223 INFO L225 Difference]: With dead ends: 32632 [2021-12-14 15:48:05,223 INFO L226 Difference]: Without dead ends: 14459 [2021-12-14 15:48:05,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:48:05,251 INFO L933 BasicCegarLoop]: 4125 mSDtfsCounter, 87 mSDsluCounter, 12399 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 16524 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:48:05,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 16524 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:48:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14459 states. [2021-12-14 15:48:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14459 to 13762. [2021-12-14 15:48:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13762 states, 12045 states have (on average 1.2704856787048568) internal successors, (15303), 12230 states have internal predecessors, (15303), 848 states have call successors, (848), 648 states have call predecessors, (848), 867 states have return successors, (1373), 885 states have call predecessors, (1373), 848 states have call successors, (1373) [2021-12-14 15:48:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13762 states to 13762 states and 17524 transitions. [2021-12-14 15:48:05,818 INFO L78 Accepts]: Start accepts. Automaton has 13762 states and 17524 transitions. Word has length 164 [2021-12-14 15:48:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:48:05,819 INFO L470 AbstractCegarLoop]: Abstraction has 13762 states and 17524 transitions. [2021-12-14 15:48:05,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2021-12-14 15:48:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 13762 states and 17524 transitions. [2021-12-14 15:48:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-14 15:48:05,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:48:05,827 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, 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] [2021-12-14 15:48:05,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 15:48:06,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:06,046 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:48:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:48:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 468634376, now seen corresponding path program 1 times [2021-12-14 15:48:06,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:48:06,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098683154] [2021-12-14 15:48:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:06,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:48:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:48:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:48:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:48:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:48:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:48:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:48:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 15:48:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 15:48:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:48:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 15:48:06,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:48:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098683154] [2021-12-14 15:48:06,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098683154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:48:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558104612] [2021-12-14 15:48:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:06,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:48:06,164 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:48:06,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 15:48:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:06,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 15:48:06,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:48:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-14 15:48:06,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:48:06,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558104612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:48:06,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:48:06,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-14 15:48:06,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593287076] [2021-12-14 15:48:06,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:48:06,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:48:06,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:48:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:48:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:48:06,479 INFO L87 Difference]: Start difference. First operand 13762 states and 17524 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-12-14 15:48:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:48:06,941 INFO L93 Difference]: Finished difference Result 25284 states and 31345 transitions. [2021-12-14 15:48:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:48:06,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 164 [2021-12-14 15:48:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:48:06,970 INFO L225 Difference]: With dead ends: 25284 [2021-12-14 15:48:06,971 INFO L226 Difference]: Without dead ends: 13654 [2021-12-14 15:48:06,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:48:06,990 INFO L933 BasicCegarLoop]: 4124 mSDtfsCounter, 49 mSDsluCounter, 12386 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 16510 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:48:06,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 16510 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:48:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13654 states. [2021-12-14 15:48:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13654 to 13318. [2021-12-14 15:48:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13318 states, 11623 states have (on average 1.2582809945797127) internal successors, (14625), 11793 states have internal predecessors, (14625), 848 states have call successors, (848), 648 states have call predecessors, (848), 845 states have return successors, (1275), 878 states have call predecessors, (1275), 848 states have call successors, (1275) [2021-12-14 15:48:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13318 states to 13318 states and 16748 transitions. [2021-12-14 15:48:07,556 INFO L78 Accepts]: Start accepts. Automaton has 13318 states and 16748 transitions. Word has length 164 [2021-12-14 15:48:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:48:07,556 INFO L470 AbstractCegarLoop]: Abstraction has 13318 states and 16748 transitions. [2021-12-14 15:48:07,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-12-14 15:48:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 13318 states and 16748 transitions. [2021-12-14 15:48:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-14 15:48:07,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:48:07,563 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, 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] [2021-12-14 15:48:07,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 15:48:07,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-14 15:48:07,780 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:48:07,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:48:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1060818162, now seen corresponding path program 1 times [2021-12-14 15:48:07,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:48:07,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902427975] [2021-12-14 15:48:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:07,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:48:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:48:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:48:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:48:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:48:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:48:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:48:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 15:48:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 15:48:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:48:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-14 15:48:07,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:48:07,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902427975] [2021-12-14 15:48:07,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902427975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:48:07,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351331560] [2021-12-14 15:48:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:07,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:48:07,870 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:48:07,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 15:48:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:07,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 15:48:07,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:48:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-14 15:48:08,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:48:08,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351331560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:48:08,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:48:08,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-14 15:48:08,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609714935] [2021-12-14 15:48:08,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:48:08,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:48:08,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:48:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:48:08,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:48:08,186 INFO L87 Difference]: Start difference. First operand 13318 states and 16748 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-12-14 15:48:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:48:08,606 INFO L93 Difference]: Finished difference Result 22320 states and 27307 transitions. [2021-12-14 15:48:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:48:08,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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 164 [2021-12-14 15:48:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:48:08,630 INFO L225 Difference]: With dead ends: 22320 [2021-12-14 15:48:08,630 INFO L226 Difference]: Without dead ends: 11134 [2021-12-14 15:48:08,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:48:08,648 INFO L933 BasicCegarLoop]: 4124 mSDtfsCounter, 10 mSDsluCounter, 12371 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16495 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:48:08,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16495 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:48:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11134 states. [2021-12-14 15:48:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11134 to 11094. [2021-12-14 15:48:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 9786 states have (on average 1.2682403433476395) internal successors, (12411), 9871 states have internal predecessors, (12411), 684 states have call successors, (684), 520 states have call predecessors, (684), 622 states have return successors, (896), 704 states have call predecessors, (896), 684 states have call successors, (896) [2021-12-14 15:48:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 13991 transitions. [2021-12-14 15:48:09,069 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 13991 transitions. Word has length 164 [2021-12-14 15:48:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:48:09,069 INFO L470 AbstractCegarLoop]: Abstraction has 11094 states and 13991 transitions. [2021-12-14 15:48:09,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-12-14 15:48:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 13991 transitions. [2021-12-14 15:48:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-14 15:48:09,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:48:09,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1] [2021-12-14 15:48:09,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-14 15:48:09,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:09,297 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:48:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:48:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash -283314742, now seen corresponding path program 1 times [2021-12-14 15:48:09,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:48:09,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993405521] [2021-12-14 15:48:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:09,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:48:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:48:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:48:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:48:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:48:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:48:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:48:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 15:48:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-14 15:48:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-14 15:48:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-14 15:48:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-14 15:48:09,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:48:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993405521] [2021-12-14 15:48:09,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993405521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:48:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88534931] [2021-12-14 15:48:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:09,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:48:09,369 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:48:09,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 15:48:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:09,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:48:09,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:48:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-14 15:48:09,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:48:09,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88534931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:48:09,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:48:09,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:48:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284574059] [2021-12-14 15:48:09,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:48:09,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:48:09,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:48:09,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:48:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:48:09,713 INFO L87 Difference]: Start difference. First operand 11094 states and 13991 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 15:48:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:48:09,966 INFO L93 Difference]: Finished difference Result 14092 states and 17355 transitions. [2021-12-14 15:48:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:48:09,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 201 [2021-12-14 15:48:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:48:09,977 INFO L225 Difference]: With dead ends: 14092 [2021-12-14 15:48:09,978 INFO L226 Difference]: Without dead ends: 4934 [2021-12-14 15:48:09,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:48:09,990 INFO L933 BasicCegarLoop]: 4242 mSDtfsCounter, 124 mSDsluCounter, 4104 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 8346 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:48:09,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 8346 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:48:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4934 states. [2021-12-14 15:48:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4934 to 4934. [2021-12-14 15:48:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4934 states, 4508 states have (on average 1.4605146406388643) internal successors, (6584), 4529 states have internal predecessors, (6584), 238 states have call successors, (238), 170 states have call predecessors, (238), 186 states have return successors, (263), 236 states have call predecessors, (263), 238 states have call successors, (263) [2021-12-14 15:48:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4934 states to 4934 states and 7085 transitions. [2021-12-14 15:48:10,126 INFO L78 Accepts]: Start accepts. Automaton has 4934 states and 7085 transitions. Word has length 201 [2021-12-14 15:48:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:48:10,127 INFO L470 AbstractCegarLoop]: Abstraction has 4934 states and 7085 transitions. [2021-12-14 15:48:10,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 15:48:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4934 states and 7085 transitions. [2021-12-14 15:48:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-14 15:48:10,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:48:10,130 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:48:10,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-14 15:48:10,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:48:10,344 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:48:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:48:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1365254827, now seen corresponding path program 1 times [2021-12-14 15:48:10,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:48:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506675635] [2021-12-14 15:48:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:10,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:48:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:48:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:48:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:48:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:48:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:48:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-14 15:48:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-14 15:48:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 15:48:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-14 15:48:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:48:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-14 15:48:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-14 15:48:10,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:48:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506675635] [2021-12-14 15:48:10,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506675635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:48:10,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:48:10,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:48:10,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166971726] [2021-12-14 15:48:10,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:48:10,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:48:10,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:48:10,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:48:10,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:48:10,455 INFO L87 Difference]: Start difference. First operand 4934 states and 7085 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 15:48:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:48:11,146 INFO L93 Difference]: Finished difference Result 5110 states and 7269 transitions. [2021-12-14 15:48:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:48:11,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 202 [2021-12-14 15:48:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:48:11,149 INFO L225 Difference]: With dead ends: 5110 [2021-12-14 15:48:11,150 INFO L226 Difference]: Without dead ends: 2123 [2021-12-14 15:48:11,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:48:11,153 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4620 mSDsluCounter, 16367 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4653 SdHoareTripleChecker+Valid, 20639 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:48:11,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4653 Valid, 20639 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:48:11,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-12-14 15:48:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2123. [2021-12-14 15:48:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 1.8656927426955703) internal successors, (3959), 2122 states have internal predecessors, (3959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:48:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3959 transitions. [2021-12-14 15:48:11,171 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3959 transitions. Word has length 202 [2021-12-14 15:48:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:48:11,171 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 3959 transitions. [2021-12-14 15:48:11,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 15:48:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3959 transitions. [2021-12-14 15:48:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1657 [2021-12-14 15:48:11,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:48:11,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:48:11,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 15:48:11,186 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:48:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:48:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash 483697301, now seen corresponding path program 1 times [2021-12-14 15:48:11,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:48:11,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208134959] [2021-12-14 15:48:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:11,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:48:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:48:11,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:48:11,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208134959] [2021-12-14 15:48:11,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208134959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:48:11,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:48:11,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 15:48:11,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106931018] [2021-12-14 15:48:11,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:48:11,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:48:11,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:48:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:48:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:48:11,920 INFO L87 Difference]: Start difference. First operand 2123 states and 3959 transitions. Second operand has 3 states, 3 states have (on average 552.0) internal successors, (1656), 2 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:48:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:48:16,609 INFO L93 Difference]: Finished difference Result 6135 states and 11522 transitions. [2021-12-14 15:48:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:48:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 552.0) internal successors, (1656), 2 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1656 [2021-12-14 15:48:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:48:16,618 INFO L225 Difference]: With dead ends: 6135 [2021-12-14 15:48:16,618 INFO L226 Difference]: Without dead ends: 4015 [2021-12-14 15:48:16,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:48:16,621 INFO L933 BasicCegarLoop]: 1354 mSDtfsCounter, 349 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 5247 mSolverCounterSat, 2356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 7603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2356 IncrementalHoareTripleChecker+Valid, 5247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-14 15:48:16,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 1577 Invalid, 7603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2356 Valid, 5247 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-14 15:48:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2021-12-14 15:48:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 3932. [2021-12-14 15:48:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 1.7061816331722208) internal successors, (6707), 3931 states have internal predecessors, (6707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:48:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 6707 transitions. [2021-12-14 15:48:16,702 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 6707 transitions. Word has length 1656 [2021-12-14 15:48:16,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:48:16,704 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 6707 transitions. [2021-12-14 15:48:16,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 552.0) internal successors, (1656), 2 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:48:16,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 6707 transitions. [2021-12-14 15:48:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1665 [2021-12-14 15:48:16,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:48:16,720 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:48:16,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 15:48:16,720 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:48:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:48:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2051285853, now seen corresponding path program 1 times [2021-12-14 15:48:16,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:48:16,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152776674] [2021-12-14 15:48:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:48:16,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:48:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:48:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:48:17,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:48:17,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152776674] [2021-12-14 15:48:17,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152776674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:48:17,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:48:17,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 15:48:17,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743073400] [2021-12-14 15:48:17,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:48:17,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:48:17,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:48:17,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:48:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:48:17,169 INFO L87 Difference]: Start difference. First operand 3932 states and 6707 transitions. Second operand has 3 states, 3 states have (on average 554.6666666666666) internal successors, (1664), 2 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)