./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.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 71780e949a27f12e7706a9946f56044d573802d6ede7cb0db653ad266c4ea0c6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:19:17,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:19:17,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:19:17,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:19:17,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:19:17,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:19:17,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:19:17,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:19:17,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:19:17,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:19:17,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:19:17,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:19:17,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:19:17,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:19:17,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:19:17,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:19:17,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:19:17,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:19:17,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:19:17,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:19:17,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:19:17,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:19:17,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:19:17,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:19:17,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:19:17,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:19:17,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:19:17,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:19:17,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:19:17,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:19:17,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:19:17,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:19:17,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:19:17,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:19:17,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:19:17,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:19:17,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:19:17,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:19:17,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:19:17,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:19:17,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:19:17,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:19:17,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:19:17,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:19:17,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:19:17,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:19:17,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:19:17,623 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:19:17,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:19:17,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:19:17,624 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:19:17,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:19:17,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:19:17,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:19:17,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:19:17,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:19:17,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:19:17,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:19:17,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:19:17,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:19:17,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:19:17,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:19:17,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:19:17,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:19:17,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:19:17,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:19:17,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:19:17,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:19:17,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:19:17,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:19:17,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:19:17,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:19:17,627 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:19:17,628 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:19:17,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:19:17,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:19:17,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71780e949a27f12e7706a9946f56044d573802d6ede7cb0db653ad266c4ea0c6 [2021-12-21 14:19:17,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:19:17,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:19:17,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:19:17,821 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:19:17,822 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:19:17,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c [2021-12-21 14:19:17,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8586f8b8a/26867f97e45647ca82ce7cb24666fa25/FLAG2b59d8150 [2021-12-21 14:19:18,563 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:19:18,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c [2021-12-21 14:19:18,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8586f8b8a/26867f97e45647ca82ce7cb24666fa25/FLAG2b59d8150 [2021-12-21 14:19:18,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8586f8b8a/26867f97e45647ca82ce7cb24666fa25 [2021-12-21 14:19:18,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:19:18,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:19:18,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:19:18,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:19:18,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:19:18,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:19:18" (1/1) ... [2021-12-21 14:19:18,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@610e715c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:18, skipping insertion in model container [2021-12-21 14:19:18,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:19:18" (1/1) ... [2021-12-21 14:19:18,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:19:19,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:19:20,228 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.01.cil-1.c[377612,377625] [2021-12-21 14:19:20,251 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.01.cil-1.c[383339,383352] [2021-12-21 14:19:20,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:19:20,344 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:19:20,945 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.01.cil-1.c[377612,377625] [2021-12-21 14:19:20,954 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c[383339,383352] [2021-12-21 14:19:20,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:19:21,007 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:19:21,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21 WrapperNode [2021-12-21 14:19:21,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:19:21,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:19:21,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:19:21,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:19:21,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,364 INFO L137 Inliner]: procedures = 46, calls = 44, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 12561 [2021-12-21 14:19:21,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:19:21,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:19:21,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:19:21,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:19:21,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:19:21,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:19:21,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:19:21,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:19:21,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (1/1) ... [2021-12-21 14:19:21,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:19:21,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:21,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 14:19:21,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 14:19:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:19:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-21 14:19:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-21 14:19:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-21 14:19:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-21 14:19:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:19:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:19:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-21 14:19:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-21 14:19:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-21 14:19:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-21 14:19:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:19:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-21 14:19:21,965 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-21 14:19:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:19:21,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:19:22,090 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:19:22,091 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:19:26,733 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:19:26,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:19:26,754 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-21 14:19:26,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:19:26 BoogieIcfgContainer [2021-12-21 14:19:26,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:19:26,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:19:26,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:19:26,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:19:26,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:19:18" (1/3) ... [2021-12-21 14:19:26,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c8ebc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:19:26, skipping insertion in model container [2021-12-21 14:19:26,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:19:21" (2/3) ... [2021-12-21 14:19:26,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c8ebc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:19:26, skipping insertion in model container [2021-12-21 14:19:26,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:19:26" (3/3) ... [2021-12-21 14:19:26,763 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.01.cil-1.c [2021-12-21 14:19:26,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:19:26,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:19:26,800 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:19:26,804 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 14:19:26,804 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:19:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 2290 states, 2266 states have (on average 1.8587819947043247) internal successors, (4212), 2269 states have internal predecessors, (4212), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-21 14:19:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 14:19:26,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:26,839 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] [2021-12-21 14:19:26,839 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash -36301034, now seen corresponding path program 1 times [2021-12-21 14:19:26,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:26,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82865840] [2021-12-21 14:19:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:26,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:26,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:26,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:19:27,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:27,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82865840] [2021-12-21 14:19:27,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82865840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:27,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:27,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:19:27,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863909852] [2021-12-21 14:19:27,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:27,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:19:27,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:27,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:19:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:19:27,053 INFO L87 Difference]: Start difference. First operand has 2290 states, 2266 states have (on average 1.8587819947043247) internal successors, (4212), 2269 states have internal predecessors, (4212), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:27,661 INFO L93 Difference]: Finished difference Result 4705 states and 8678 transitions. [2021-12-21 14:19:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:19:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 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 57 [2021-12-21 14:19:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:27,679 INFO L225 Difference]: With dead ends: 4705 [2021-12-21 14:19:27,679 INFO L226 Difference]: Without dead ends: 2354 [2021-12-21 14:19:27,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:19:27,701 INFO L933 BasicCegarLoop]: 4187 mSDtfsCounter, 4313 mSDsluCounter, 12371 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 16558 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:27,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4321 Valid, 16558 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:19:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-12-21 14:19:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2313. [2021-12-21 14:19:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2273 states have (on average 1.8376594808622966) internal successors, (4177), 2276 states have internal predecessors, (4177), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2021-12-21 14:19:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 4230 transitions. [2021-12-21 14:19:27,817 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 4230 transitions. Word has length 57 [2021-12-21 14:19:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:27,817 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 4230 transitions. [2021-12-21 14:19:27,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:27,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 4230 transitions. [2021-12-21 14:19:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 14:19:27,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:27,820 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] [2021-12-21 14:19:27,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:19:27,821 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash -948253030, now seen corresponding path program 1 times [2021-12-21 14:19:27,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:27,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098667651] [2021-12-21 14:19:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:27,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:19:27,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:27,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098667651] [2021-12-21 14:19:27,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098667651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:27,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:27,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:19:27,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093373359] [2021-12-21 14:19:27,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:27,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:19:27,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:27,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:19:27,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:19:27,982 INFO L87 Difference]: Start difference. First operand 2313 states and 4230 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:28,946 INFO L93 Difference]: Finished difference Result 2645 states and 4704 transitions. [2021-12-21 14:19:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:19:28,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2021-12-21 14:19:28,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:28,957 INFO L225 Difference]: With dead ends: 2645 [2021-12-21 14:19:28,957 INFO L226 Difference]: Without dead ends: 2462 [2021-12-21 14:19:28,961 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 [2021-12-21 14:19:28,962 INFO L933 BasicCegarLoop]: 4176 mSDtfsCounter, 4231 mSDsluCounter, 16333 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 20509 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:28,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4239 Valid, 20509 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:19:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-12-21 14:19:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2398. [2021-12-21 14:19:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2341 states have (on average 1.8248611704399829) internal successors, (4272), 2345 states have internal predecessors, (4272), 35 states have call successors, (35), 18 states have call predecessors, (35), 20 states have return successors, (40), 36 states have call predecessors, (40), 35 states have call successors, (40) [2021-12-21 14:19:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 4347 transitions. [2021-12-21 14:19:29,016 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 4347 transitions. Word has length 57 [2021-12-21 14:19:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:29,016 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 4347 transitions. [2021-12-21 14:19:29,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 4347 transitions. [2021-12-21 14:19:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 14:19:29,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:29,021 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] [2021-12-21 14:19:29,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:19:29,022 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1297326424, now seen corresponding path program 1 times [2021-12-21 14:19:29,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:29,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233178332] [2021-12-21 14:19:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:29,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:19:29,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:29,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233178332] [2021-12-21 14:19:29,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233178332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:29,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:29,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:19:29,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224494194] [2021-12-21 14:19:29,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:29,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:19:29,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:29,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:19:29,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:19:29,139 INFO L87 Difference]: Start difference. First operand 2398 states and 4347 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:29,562 INFO L93 Difference]: Finished difference Result 2981 states and 5171 transitions. [2021-12-21 14:19:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:19:29,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2021-12-21 14:19:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:29,571 INFO L225 Difference]: With dead ends: 2981 [2021-12-21 14:19:29,572 INFO L226 Difference]: Without dead ends: 2713 [2021-12-21 14:19:29,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:19:29,574 INFO L933 BasicCegarLoop]: 4166 mSDtfsCounter, 4285 mSDsluCounter, 16321 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4295 SdHoareTripleChecker+Valid, 20487 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:29,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4295 Valid, 20487 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:19:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-21 14:19:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2563. [2021-12-21 14:19:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2474 states have (on average 1.8023443815683104) internal successors, (4459), 2480 states have internal predecessors, (4459), 53 states have call successors, (53), 30 states have call predecessors, (53), 34 states have return successors, (66), 56 states have call predecessors, (66), 53 states have call successors, (66) [2021-12-21 14:19:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 4578 transitions. [2021-12-21 14:19:29,618 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 4578 transitions. Word has length 57 [2021-12-21 14:19:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:29,618 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 4578 transitions. [2021-12-21 14:19:29,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 4578 transitions. [2021-12-21 14:19:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 14:19:29,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:29,620 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] [2021-12-21 14:19:29,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:19:29,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash 399933146, now seen corresponding path program 1 times [2021-12-21 14:19:29,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:29,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073389694] [2021-12-21 14:19:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:29,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:19:29,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:29,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073389694] [2021-12-21 14:19:29,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073389694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:29,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:29,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:19:29,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978351106] [2021-12-21 14:19:29,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:29,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:19:29,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:19:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:19:29,668 INFO L87 Difference]: Start difference. First operand 2563 states and 4578 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:30,150 INFO L93 Difference]: Finished difference Result 3503 states and 5902 transitions. [2021-12-21 14:19:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:19:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2021-12-21 14:19:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:30,160 INFO L225 Difference]: With dead ends: 3503 [2021-12-21 14:19:30,160 INFO L226 Difference]: Without dead ends: 3070 [2021-12-21 14:19:30,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:19:30,162 INFO L933 BasicCegarLoop]: 4167 mSDtfsCounter, 4228 mSDsluCounter, 16303 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 20470 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:30,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4235 Valid, 20470 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:19:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-12-21 14:19:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2862. [2021-12-21 14:19:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2715 states have (on average 1.7661141804788214) internal successors, (4795), 2725 states have internal predecessors, (4795), 85 states have call successors, (85), 52 states have call predecessors, (85), 60 states have return successors, (120), 92 states have call predecessors, (120), 85 states have call successors, (120) [2021-12-21 14:19:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 5000 transitions. [2021-12-21 14:19:30,212 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 5000 transitions. Word has length 57 [2021-12-21 14:19:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:30,213 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 5000 transitions. [2021-12-21 14:19:30,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 5000 transitions. [2021-12-21 14:19:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 14:19:30,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:30,214 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] [2021-12-21 14:19:30,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:19:30,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash 648079640, now seen corresponding path program 1 times [2021-12-21 14:19:30,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:30,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050633631] [2021-12-21 14:19:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:30,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:19:30,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050633631] [2021-12-21 14:19:30,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050633631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:30,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:30,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:19:30,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216063152] [2021-12-21 14:19:30,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:30,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:19:30,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:19:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:19:30,258 INFO L87 Difference]: Start difference. First operand 2862 states and 5000 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:30,647 INFO L93 Difference]: Finished difference Result 4199 states and 6894 transitions. [2021-12-21 14:19:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:19:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 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 57 [2021-12-21 14:19:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:30,657 INFO L225 Difference]: With dead ends: 4199 [2021-12-21 14:19:30,658 INFO L226 Difference]: Without dead ends: 3468 [2021-12-21 14:19:30,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:19:30,661 INFO L933 BasicCegarLoop]: 4213 mSDtfsCounter, 4340 mSDsluCounter, 12169 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4363 SdHoareTripleChecker+Valid, 16382 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:30,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4363 Valid, 16382 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:19:30,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2021-12-21 14:19:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 3263. [2021-12-21 14:19:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3033 states have (on average 1.7213979558193209) internal successors, (5221), 3052 states have internal predecessors, (5221), 134 states have call successors, (134), 82 states have call predecessors, (134), 94 states have return successors, (179), 136 states have call predecessors, (179), 134 states have call successors, (179) [2021-12-21 14:19:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 5534 transitions. [2021-12-21 14:19:30,734 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 5534 transitions. Word has length 57 [2021-12-21 14:19:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:30,735 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 5534 transitions. [2021-12-21 14:19:30,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:19:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 5534 transitions. [2021-12-21 14:19:30,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 14:19:30,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:30,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:19:30,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:19:30,738 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash 12281189, now seen corresponding path program 1 times [2021-12-21 14:19:30,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:30,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078901293] [2021-12-21 14:19:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:30,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 14:19:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:19:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:19:30,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:30,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078901293] [2021-12-21 14:19:30,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078901293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:19:30,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319939781] [2021-12-21 14:19:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:30,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:30,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:30,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:19:30,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:19:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:19:31,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:19:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:19:31,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:19:31,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319939781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:31,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:19:31,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:19:31,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342673319] [2021-12-21 14:19:31,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:31,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:19:31,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:31,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:19:31,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:31,165 INFO L87 Difference]: Start difference. First operand 3263 states and 5534 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-21 14:19:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:31,242 INFO L93 Difference]: Finished difference Result 5442 states and 8608 transitions. [2021-12-21 14:19:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:19:31,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 92 [2021-12-21 14:19:31,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:31,256 INFO L225 Difference]: With dead ends: 5442 [2021-12-21 14:19:31,256 INFO L226 Difference]: Without dead ends: 4311 [2021-12-21 14:19:31,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:31,261 INFO L933 BasicCegarLoop]: 4217 mSDtfsCounter, 114 mSDsluCounter, 4096 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 8313 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 [2021-12-21 14:19:31,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 8313 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:19:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-12-21 14:19:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 4311. [2021-12-21 14:19:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4311 states, 3872 states have (on average 1.6417871900826446) internal successors, (6357), 3904 states have internal predecessors, (6357), 253 states have call successors, (253), 160 states have call predecessors, (253), 184 states have return successors, (376), 262 states have call predecessors, (376), 253 states have call successors, (376) [2021-12-21 14:19:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 6986 transitions. [2021-12-21 14:19:31,357 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 6986 transitions. Word has length 92 [2021-12-21 14:19:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:31,358 INFO L470 AbstractCegarLoop]: Abstraction has 4311 states and 6986 transitions. [2021-12-21 14:19:31,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-21 14:19:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 6986 transitions. [2021-12-21 14:19:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 14:19:31,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:31,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:19:31,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:19:31,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 14:19:31,579 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash -788169551, now seen corresponding path program 1 times [2021-12-21 14:19:31,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:31,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687549940] [2021-12-21 14:19:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:31,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 14:19:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 14:19:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-21 14:19:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 14:19:31,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:31,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687549940] [2021-12-21 14:19:31,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687549940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:19:31,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409269100] [2021-12-21 14:19:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:31,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:31,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:31,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:19:31,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:19:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:19:31,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:19:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:19:31,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:19:31,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409269100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:31,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:19:31,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:19:31,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856089045] [2021-12-21 14:19:31,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:31,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:19:31,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:19:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:31,917 INFO L87 Difference]: Start difference. First operand 4311 states and 6986 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-12-21 14:19:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:32,026 INFO L93 Difference]: Finished difference Result 8527 states and 12855 transitions. [2021-12-21 14:19:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:19:32,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 118 [2021-12-21 14:19:32,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:32,046 INFO L225 Difference]: With dead ends: 8527 [2021-12-21 14:19:32,046 INFO L226 Difference]: Without dead ends: 6351 [2021-12-21 14:19:32,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:32,053 INFO L933 BasicCegarLoop]: 4117 mSDtfsCounter, 4026 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4026 SdHoareTripleChecker+Valid, 4237 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 [2021-12-21 14:19:32,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4026 Valid, 4237 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:19:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-12-21 14:19:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 6293. [2021-12-21 14:19:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6293 states, 5460 states have (on average 1.5576923076923077) internal successors, (8505), 5521 states have internal predecessors, (8505), 473 states have call successors, (473), 310 states have call predecessors, (473), 358 states have return successors, (688), 477 states have call predecessors, (688), 473 states have call successors, (688) [2021-12-21 14:19:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 9666 transitions. [2021-12-21 14:19:32,193 INFO L78 Accepts]: Start accepts. Automaton has 6293 states and 9666 transitions. Word has length 118 [2021-12-21 14:19:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:32,193 INFO L470 AbstractCegarLoop]: Abstraction has 6293 states and 9666 transitions. [2021-12-21 14:19:32,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-12-21 14:19:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6293 states and 9666 transitions. [2021-12-21 14:19:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 14:19:32,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:32,201 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, 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] [2021-12-21 14:19:32,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:19:32,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-21 14:19:32,417 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:32,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1080279049, now seen corresponding path program 1 times [2021-12-21 14:19:32,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:32,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559967680] [2021-12-21 14:19:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:32,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 14:19:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 14:19:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 14:19:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:19:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 14:19:32,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:32,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559967680] [2021-12-21 14:19:32,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559967680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:19:32,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919665021] [2021-12-21 14:19:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:32,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:32,502 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:19:32,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:19:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:32,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:19:32,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:19:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 14:19:32,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:19:32,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919665021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:32,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:19:32,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:19:32,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631026300] [2021-12-21 14:19:32,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:32,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:19:32,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:19:32,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:32,753 INFO L87 Difference]: Start difference. First operand 6293 states and 9666 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:19:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:32,963 INFO L93 Difference]: Finished difference Result 9515 states and 14095 transitions. [2021-12-21 14:19:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:19:32,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 134 [2021-12-21 14:19:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:32,996 INFO L225 Difference]: With dead ends: 9515 [2021-12-21 14:19:32,996 INFO L226 Difference]: Without dead ends: 6621 [2021-12-21 14:19:33,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:33,007 INFO L933 BasicCegarLoop]: 4120 mSDtfsCounter, 4059 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4059 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:33,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4059 Valid, 4248 Invalid, 10 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:19:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6621 states. [2021-12-21 14:19:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6621 to 6583. [2021-12-21 14:19:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 5718 states have (on average 1.5318293109478838) internal successors, (8759), 5779 states have internal predecessors, (8759), 479 states have call successors, (479), 336 states have call predecessors, (479), 384 states have return successors, (720), 483 states have call predecessors, (720), 479 states have call successors, (720) [2021-12-21 14:19:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 9958 transitions. [2021-12-21 14:19:33,226 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 9958 transitions. Word has length 134 [2021-12-21 14:19:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:33,227 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 9958 transitions. [2021-12-21 14:19:33,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 14:19:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 9958 transitions. [2021-12-21 14:19:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:19:33,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:33,237 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, 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] [2021-12-21 14:19:33,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:19:33,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:33,454 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash 703612430, now seen corresponding path program 1 times [2021-12-21 14:19:33,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:33,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527454909] [2021-12-21 14:19:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:33,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 14:19:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:19:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:19:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-21 14:19:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 14:19:33,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:33,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527454909] [2021-12-21 14:19:33,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527454909] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:19:33,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78413490] [2021-12-21 14:19:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:33,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:33,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:33,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:19:33,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:19:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:19:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:19:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 14:19:33,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:19:33,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78413490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:33,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:19:33,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:19:33,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848258577] [2021-12-21 14:19:33,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:33,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:19:33,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:33,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:19:33,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:33,903 INFO L87 Difference]: Start difference. First operand 6583 states and 9958 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-21 14:19:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:34,231 INFO L93 Difference]: Finished difference Result 8950 states and 13283 transitions. [2021-12-21 14:19:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:19:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 135 [2021-12-21 14:19:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:34,271 INFO L225 Difference]: With dead ends: 8950 [2021-12-21 14:19:34,271 INFO L226 Difference]: Without dead ends: 6617 [2021-12-21 14:19:34,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:34,280 INFO L933 BasicCegarLoop]: 4205 mSDtfsCounter, 99 mSDsluCounter, 4087 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 8292 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:34,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 8292 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:19:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-12-21 14:19:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 6559. [2021-12-21 14:19:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 5694 states have (on average 1.5175623463294696) internal successors, (8641), 5755 states have internal predecessors, (8641), 479 states have call successors, (479), 336 states have call predecessors, (479), 384 states have return successors, (720), 483 states have call predecessors, (720), 479 states have call successors, (720) [2021-12-21 14:19:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 9840 transitions. [2021-12-21 14:19:34,493 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 9840 transitions. Word has length 135 [2021-12-21 14:19:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:34,494 INFO L470 AbstractCegarLoop]: Abstraction has 6559 states and 9840 transitions. [2021-12-21 14:19:34,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-21 14:19:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 9840 transitions. [2021-12-21 14:19:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:19:34,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:34,503 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:19:34,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 14:19:34,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:34,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1285829934, now seen corresponding path program 1 times [2021-12-21 14:19:34,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:34,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313356408] [2021-12-21 14:19:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:34,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 14:19:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:19:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:19:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-21 14:19:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 14:19:34,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:34,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313356408] [2021-12-21 14:19:34,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313356408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:19:34,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311095546] [2021-12-21 14:19:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:34,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:34,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:34,974 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) [2021-12-21 14:19:34,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 14:19:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:19:35,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:19:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 14:19:35,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:19:35,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311095546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:35,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:19:35,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:19:35,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974316829] [2021-12-21 14:19:35,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:35,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:19:35,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:35,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:19:35,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:35,276 INFO L87 Difference]: Start difference. First operand 6559 states and 9840 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-12-21 14:19:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:35,410 INFO L93 Difference]: Finished difference Result 9831 states and 14294 transitions. [2021-12-21 14:19:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:19:35,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 135 [2021-12-21 14:19:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:35,426 INFO L225 Difference]: With dead ends: 9831 [2021-12-21 14:19:35,426 INFO L226 Difference]: Without dead ends: 5941 [2021-12-21 14:19:35,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:19:35,436 INFO L933 BasicCegarLoop]: 4100 mSDtfsCounter, 4077 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4077 SdHoareTripleChecker+Valid, 4124 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 [2021-12-21 14:19:35,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4077 Valid, 4124 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:19:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-12-21 14:19:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 5711. [2021-12-21 14:19:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5012 states have (on average 1.5157621707901037) internal successors, (7597), 5057 states have internal predecessors, (7597), 391 states have call successors, (391), 274 states have call predecessors, (391), 306 states have return successors, (510), 387 states have call predecessors, (510), 391 states have call successors, (510) [2021-12-21 14:19:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 8498 transitions. [2021-12-21 14:19:35,589 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 8498 transitions. Word has length 135 [2021-12-21 14:19:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:35,590 INFO L470 AbstractCegarLoop]: Abstraction has 5711 states and 8498 transitions. [2021-12-21 14:19:35,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2021-12-21 14:19:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 8498 transitions. [2021-12-21 14:19:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 14:19:35,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:35,595 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:19:35,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 14:19:35,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 14:19:35,814 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:35,814 INFO L85 PathProgramCache]: Analyzing trace with hash -371269117, now seen corresponding path program 1 times [2021-12-21 14:19:35,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619634436] [2021-12-21 14:19:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:35,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 14:19:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:19:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:19:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-21 14:19:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 14:19:35,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:35,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619634436] [2021-12-21 14:19:35,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619634436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:19:35,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152470335] [2021-12-21 14:19:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:35,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:35,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:35,893 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) [2021-12-21 14:19:35,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 14:19:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:35,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 14:19:35,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:19:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-21 14:19:36,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:19:36,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152470335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:36,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:19:36,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-21 14:19:36,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50735085] [2021-12-21 14:19:36,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:36,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:19:36,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:19:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:19:36,172 INFO L87 Difference]: Start difference. First operand 5711 states and 8498 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2021-12-21 14:19:36,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:36,367 INFO L93 Difference]: Finished difference Result 7117 states and 10335 transitions. [2021-12-21 14:19:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 14:19:36,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 136 [2021-12-21 14:19:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:36,378 INFO L225 Difference]: With dead ends: 7117 [2021-12-21 14:19:36,379 INFO L226 Difference]: Without dead ends: 4791 [2021-12-21 14:19:36,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:19:36,385 INFO L933 BasicCegarLoop]: 4078 mSDtfsCounter, 4094 mSDsluCounter, 8053 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 12131 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:36,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4102 Valid, 12131 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:19:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-12-21 14:19:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 4779. [2021-12-21 14:19:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4262 states have (on average 1.544580009385265) internal successors, (6583), 4289 states have internal predecessors, (6583), 295 states have call successors, (295), 204 states have call predecessors, (295), 220 states have return successors, (354), 289 states have call predecessors, (354), 295 states have call successors, (354) [2021-12-21 14:19:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 7232 transitions. [2021-12-21 14:19:36,524 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 7232 transitions. Word has length 136 [2021-12-21 14:19:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:36,524 INFO L470 AbstractCegarLoop]: Abstraction has 4779 states and 7232 transitions. [2021-12-21 14:19:36,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2021-12-21 14:19:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 7232 transitions. [2021-12-21 14:19:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 14:19:36,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:36,528 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:19:36,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 14:19:36,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:36,746 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1678411515, now seen corresponding path program 1 times [2021-12-21 14:19:36,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:36,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656697852] [2021-12-21 14:19:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:36,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 14:19:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:19:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:19:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-21 14:19:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 14:19:36,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:36,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656697852] [2021-12-21 14:19:36,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656697852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:19:36,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546008700] [2021-12-21 14:19:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:36,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:36,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:36,848 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) [2021-12-21 14:19:36,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 14:19:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:36,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 14:19:36,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:19:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-21 14:19:37,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:19:37,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546008700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:37,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:19:37,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-21 14:19:37,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610303698] [2021-12-21 14:19:37,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:37,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:19:37,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:19:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:19:37,104 INFO L87 Difference]: Start difference. First operand 4779 states and 7232 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2021-12-21 14:19:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:37,401 INFO L93 Difference]: Finished difference Result 7083 states and 10147 transitions. [2021-12-21 14:19:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:19:37,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 136 [2021-12-21 14:19:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:37,410 INFO L225 Difference]: With dead ends: 7083 [2021-12-21 14:19:37,411 INFO L226 Difference]: Without dead ends: 4732 [2021-12-21 14:19:37,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:19:37,416 INFO L933 BasicCegarLoop]: 4090 mSDtfsCounter, 4115 mSDsluCounter, 8050 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4123 SdHoareTripleChecker+Valid, 12140 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:37,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4123 Valid, 12140 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:19:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2021-12-21 14:19:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 3773. [2021-12-21 14:19:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3773 states, 3468 states have (on average 1.6000576701268743) internal successors, (5549), 3483 states have internal predecessors, (5549), 173 states have call successors, (173), 122 states have call predecessors, (173), 130 states have return successors, (203), 169 states have call predecessors, (203), 173 states have call successors, (203) [2021-12-21 14:19:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3773 states to 3773 states and 5925 transitions. [2021-12-21 14:19:37,527 INFO L78 Accepts]: Start accepts. Automaton has 3773 states and 5925 transitions. Word has length 136 [2021-12-21 14:19:37,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:37,527 INFO L470 AbstractCegarLoop]: Abstraction has 3773 states and 5925 transitions. [2021-12-21 14:19:37,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2021-12-21 14:19:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3773 states and 5925 transitions. [2021-12-21 14:19:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 14:19:37,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:37,530 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:19:37,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 14:19:37,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:37,751 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:37,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash 219085251, now seen corresponding path program 1 times [2021-12-21 14:19:37,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:37,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794367610] [2021-12-21 14:19:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:37,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 14:19:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:19:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:19:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-21 14:19:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 14:19:37,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:37,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794367610] [2021-12-21 14:19:37,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794367610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:19:37,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455222986] [2021-12-21 14:19:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:37,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:37,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:37,864 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) [2021-12-21 14:19:37,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 14:19:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:37,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 14:19:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:19:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-21 14:19:38,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:19:38,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455222986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:38,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:19:38,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-21 14:19:38,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274762046] [2021-12-21 14:19:38,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:38,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:19:38,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:19:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:19:38,112 INFO L87 Difference]: Start difference. First operand 3773 states and 5925 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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) [2021-12-21 14:19:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:38,224 INFO L93 Difference]: Finished difference Result 4900 states and 7289 transitions. [2021-12-21 14:19:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:19:38,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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 136 [2021-12-21 14:19:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:38,231 INFO L225 Difference]: With dead ends: 4900 [2021-12-21 14:19:38,231 INFO L226 Difference]: Without dead ends: 3258 [2021-12-21 14:19:38,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:19:38,236 INFO L933 BasicCegarLoop]: 4090 mSDtfsCounter, 48 mSDsluCounter, 12279 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 16369 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 [2021-12-21 14:19:38,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 16369 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:19:38,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-12-21 14:19:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 3222. [2021-12-21 14:19:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3024 states have (on average 1.6537698412698412) internal successors, (5001), 3035 states have internal predecessors, (5001), 110 states have call successors, (110), 79 states have call predecessors, (110), 86 states have return successors, (121), 108 states have call predecessors, (121), 110 states have call successors, (121) [2021-12-21 14:19:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 5232 transitions. [2021-12-21 14:19:38,315 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 5232 transitions. Word has length 136 [2021-12-21 14:19:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:38,315 INFO L470 AbstractCegarLoop]: Abstraction has 3222 states and 5232 transitions. [2021-12-21 14:19:38,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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) [2021-12-21 14:19:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 5232 transitions. [2021-12-21 14:19:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 14:19:38,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:38,317 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:19:38,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 14:19:38,537 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,SelfDestructingSolverStorable12 [2021-12-21 14:19:38,537 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:38,537 INFO L85 PathProgramCache]: Analyzing trace with hash 731116351, now seen corresponding path program 1 times [2021-12-21 14:19:38,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:38,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765396476] [2021-12-21 14:19:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:38,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 14:19:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:19:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:19:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-21 14:19:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 14:19:38,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765396476] [2021-12-21 14:19:38,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765396476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:19:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761716116] [2021-12-21 14:19:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:38,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:19:38,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:19:38,615 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) [2021-12-21 14:19:38,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 14:19:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 14:19:38,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:19:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 14:19:38,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:19:38,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761716116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:38,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:19:38,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-21 14:19:38,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894190430] [2021-12-21 14:19:38,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:38,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:19:38,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:19:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:19:38,884 INFO L87 Difference]: Start difference. First operand 3222 states and 5232 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2021-12-21 14:19:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:39,008 INFO L93 Difference]: Finished difference Result 4341 states and 6571 transitions. [2021-12-21 14:19:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:19:39,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 136 [2021-12-21 14:19:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:39,015 INFO L225 Difference]: With dead ends: 4341 [2021-12-21 14:19:39,015 INFO L226 Difference]: Without dead ends: 3250 [2021-12-21 14:19:39,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:19:39,018 INFO L933 BasicCegarLoop]: 4089 mSDtfsCounter, 10 mSDsluCounter, 12266 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16355 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 [2021-12-21 14:19:39,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16355 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:19:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-12-21 14:19:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3234. [2021-12-21 14:19:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3036 states have (on average 1.6442687747035574) internal successors, (4992), 3047 states have internal predecessors, (4992), 110 states have call successors, (110), 79 states have call predecessors, (110), 86 states have return successors, (121), 108 states have call predecessors, (121), 110 states have call successors, (121) [2021-12-21 14:19:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 5223 transitions. [2021-12-21 14:19:39,100 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 5223 transitions. Word has length 136 [2021-12-21 14:19:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:39,100 INFO L470 AbstractCegarLoop]: Abstraction has 3234 states and 5223 transitions. [2021-12-21 14:19:39,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2021-12-21 14:19:39,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 5223 transitions. [2021-12-21 14:19:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 14:19:39,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:39,102 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:19:39,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 14:19:39,327 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,SelfDestructingSolverStorable13 [2021-12-21 14:19:39,327 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash -26178757, now seen corresponding path program 1 times [2021-12-21 14:19:39,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:39,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647326667] [2021-12-21 14:19:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:39,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 14:19:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:19:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:19:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-21 14:19:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-21 14:19:39,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647326667] [2021-12-21 14:19:39,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647326667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:39,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:39,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:19:39,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752257115] [2021-12-21 14:19:39,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:39,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:19:39,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:19:39,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:19:39,443 INFO L87 Difference]: Start difference. First operand 3234 states and 5223 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-21 14:19:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:39,990 INFO L93 Difference]: Finished difference Result 4191 states and 6295 transitions. [2021-12-21 14:19:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 14:19:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 136 [2021-12-21 14:19:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:39,997 INFO L225 Difference]: With dead ends: 4191 [2021-12-21 14:19:39,997 INFO L226 Difference]: Without dead ends: 4189 [2021-12-21 14:19:39,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-21 14:19:39,999 INFO L933 BasicCegarLoop]: 4160 mSDtfsCounter, 4428 mSDsluCounter, 12164 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4451 SdHoareTripleChecker+Valid, 16324 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:39,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4451 Valid, 16324 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:19:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-12-21 14:19:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3610. [2021-12-21 14:19:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3346 states have (on average 1.5971309025702332) internal successors, (5344), 3361 states have internal predecessors, (5344), 144 states have call successors, (144), 103 states have call predecessors, (144), 118 states have return successors, (163), 146 states have call predecessors, (163), 144 states have call successors, (163) [2021-12-21 14:19:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 5651 transitions. [2021-12-21 14:19:40,109 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 5651 transitions. Word has length 136 [2021-12-21 14:19:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:40,110 INFO L470 AbstractCegarLoop]: Abstraction has 3610 states and 5651 transitions. [2021-12-21 14:19:40,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-21 14:19:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 5651 transitions. [2021-12-21 14:19:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-21 14:19:40,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:40,113 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-21 14:19:40,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:19:40,113 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:40,114 INFO L85 PathProgramCache]: Analyzing trace with hash -970573154, now seen corresponding path program 2 times [2021-12-21 14:19:40,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:40,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770642650] [2021-12-21 14:19:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:40,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:19:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 14:19:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:19:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 14:19:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:19:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 14:19:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:19:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 14:19:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-21 14:19:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-21 14:19:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:19:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-21 14:19:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-21 14:19:40,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:40,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770642650] [2021-12-21 14:19:40,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770642650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:40,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:40,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:19:40,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890669376] [2021-12-21 14:19:40,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:40,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:19:40,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:40,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:19:40,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:19:40,186 INFO L87 Difference]: Start difference. First operand 3610 states and 5651 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-21 14:19:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:40,655 INFO L93 Difference]: Finished difference Result 5333 states and 7624 transitions. [2021-12-21 14:19:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 14:19:40,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 175 [2021-12-21 14:19:40,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:40,659 INFO L225 Difference]: With dead ends: 5333 [2021-12-21 14:19:40,659 INFO L226 Difference]: Without dead ends: 2123 [2021-12-21 14:19:40,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:19:40,664 INFO L933 BasicCegarLoop]: 4120 mSDtfsCounter, 4539 mSDsluCounter, 12134 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4554 SdHoareTripleChecker+Valid, 16254 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:40,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4554 Valid, 16254 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:19:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-12-21 14:19:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2123. [2021-12-21 14:19:40,683 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) [2021-12-21 14:19:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3959 transitions. [2021-12-21 14:19:40,686 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3959 transitions. Word has length 175 [2021-12-21 14:19:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:40,686 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 3959 transitions. [2021-12-21 14:19:40,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-21 14:19:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3959 transitions. [2021-12-21 14:19:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1657 [2021-12-21 14:19:40,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:40,724 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] [2021-12-21 14:19:40,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:19:40,725 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1721246571, now seen corresponding path program 1 times [2021-12-21 14:19:40,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:40,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066443166] [2021-12-21 14:19:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:40,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:19:41,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:41,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066443166] [2021-12-21 14:19:41,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066443166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:41,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:41,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:19:41,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270295470] [2021-12-21 14:19:41,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:41,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:19:41,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:41,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:19:41,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:19:41,645 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) [2021-12-21 14:19:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:46,172 INFO L93 Difference]: Finished difference Result 6028 states and 11335 transitions. [2021-12-21 14:19:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:19:46,173 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 [2021-12-21 14:19:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:46,182 INFO L225 Difference]: With dead ends: 6028 [2021-12-21 14:19:46,182 INFO L226 Difference]: Without dead ends: 3908 [2021-12-21 14:19:46,185 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 [2021-12-21 14:19:46,186 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 307 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 5544 mSolverCounterSat, 1409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 6953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1409 IncrementalHoareTripleChecker+Valid, 5544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:46,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 2007 Invalid, 6953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1409 Valid, 5544 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-21 14:19:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2021-12-21 14:19:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 3901. [2021-12-21 14:19:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 1.6194871794871795) internal successors, (6316), 3900 states have internal predecessors, (6316), 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) [2021-12-21 14:19:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 6316 transitions. [2021-12-21 14:19:46,234 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 6316 transitions. Word has length 1656 [2021-12-21 14:19:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:46,235 INFO L470 AbstractCegarLoop]: Abstraction has 3901 states and 6316 transitions. [2021-12-21 14:19:46,236 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) [2021-12-21 14:19:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 6316 transitions. [2021-12-21 14:19:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1662 [2021-12-21 14:19:46,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:46,298 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-12-21 14:19:46,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:19:46,298 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -895607770, now seen corresponding path program 1 times [2021-12-21 14:19:46,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:46,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361494317] [2021-12-21 14:19:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:46,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:19:46,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:46,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361494317] [2021-12-21 14:19:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361494317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:46,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:46,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:19:46,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910285061] [2021-12-21 14:19:46,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:46,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:19:46,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:19:46,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:19:46,760 INFO L87 Difference]: Start difference. First operand 3901 states and 6316 transitions. Second operand has 3 states, 3 states have (on average 553.6666666666666) internal successors, (1661), 2 states have internal predecessors, (1661), 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) [2021-12-21 14:19:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:51,282 INFO L93 Difference]: Finished difference Result 11238 states and 18284 transitions. [2021-12-21 14:19:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:19:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 553.6666666666666) internal successors, (1661), 2 states have internal predecessors, (1661), 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 1661 [2021-12-21 14:19:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:51,294 INFO L225 Difference]: With dead ends: 11238 [2021-12-21 14:19:51,295 INFO L226 Difference]: Without dead ends: 7340 [2021-12-21 14:19:51,299 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 [2021-12-21 14:19:51,300 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 2569 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 4780 mSolverCounterSat, 2059 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 6839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2059 IncrementalHoareTripleChecker+Valid, 4780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:51,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2569 Valid, 1742 Invalid, 6839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2059 Valid, 4780 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-21 14:19:51,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7340 states. [2021-12-21 14:19:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7340 to 7339. [2021-12-21 14:19:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7339 states, 7338 states have (on average 1.4618424638866176) internal successors, (10727), 7338 states have internal predecessors, (10727), 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) [2021-12-21 14:19:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7339 states to 7339 states and 10727 transitions. [2021-12-21 14:19:51,364 INFO L78 Accepts]: Start accepts. Automaton has 7339 states and 10727 transitions. Word has length 1661 [2021-12-21 14:19:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:51,365 INFO L470 AbstractCegarLoop]: Abstraction has 7339 states and 10727 transitions. [2021-12-21 14:19:51,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.6666666666666) internal successors, (1661), 2 states have internal predecessors, (1661), 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) [2021-12-21 14:19:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7339 states and 10727 transitions. [2021-12-21 14:19:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1668 [2021-12-21 14:19:51,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:51,393 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:19:51,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:19:51,393 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1205127054, now seen corresponding path program 1 times [2021-12-21 14:19:51,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:51,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203405202] [2021-12-21 14:19:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:51,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:19:51,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:51,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203405202] [2021-12-21 14:19:51,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203405202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:51,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:51,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:19:51,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922817112] [2021-12-21 14:19:51,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:51,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:19:51,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:19:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:19:51,806 INFO L87 Difference]: Start difference. First operand 7339 states and 10727 transitions. Second operand has 3 states, 3 states have (on average 555.6666666666666) internal successors, (1667), 2 states have internal predecessors, (1667), 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) [2021-12-21 14:19:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:19:56,557 INFO L93 Difference]: Finished difference Result 21489 states and 31467 transitions. [2021-12-21 14:19:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:19:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 555.6666666666666) internal successors, (1667), 2 states have internal predecessors, (1667), 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 1667 [2021-12-21 14:19:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:19:56,585 INFO L225 Difference]: With dead ends: 21489 [2021-12-21 14:19:56,585 INFO L226 Difference]: Without dead ends: 14153 [2021-12-21 14:19:56,596 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 [2021-12-21 14:19:56,596 INFO L933 BasicCegarLoop]: 2143 mSDtfsCounter, 2128 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 4506 mSolverCounterSat, 2353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2128 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 6859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2353 IncrementalHoareTripleChecker+Valid, 4506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:19:56,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2128 Valid, 2283 Invalid, 6859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2353 Valid, 4506 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-21 14:19:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2021-12-21 14:19:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 14150. [2021-12-21 14:19:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14150 states, 14149 states have (on average 1.339599971729451) internal successors, (18954), 14149 states have internal predecessors, (18954), 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) [2021-12-21 14:19:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14150 states to 14150 states and 18954 transitions. [2021-12-21 14:19:56,767 INFO L78 Accepts]: Start accepts. Automaton has 14150 states and 18954 transitions. Word has length 1667 [2021-12-21 14:19:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:19:56,768 INFO L470 AbstractCegarLoop]: Abstraction has 14150 states and 18954 transitions. [2021-12-21 14:19:56,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 555.6666666666666) internal successors, (1667), 2 states have internal predecessors, (1667), 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) [2021-12-21 14:19:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 14150 states and 18954 transitions. [2021-12-21 14:19:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1675 [2021-12-21 14:19:56,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:19:56,807 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:19:56,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:19:56,807 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:19:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:19:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1088462173, now seen corresponding path program 1 times [2021-12-21 14:19:56,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:19:56,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738852405] [2021-12-21 14:19:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:19:56,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:19:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:19:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:19:57,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:19:57,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738852405] [2021-12-21 14:19:57,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738852405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:19:57,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:19:57,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:19:57,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605624100] [2021-12-21 14:19:57,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:19:57,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:19:57,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:19:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:19:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:19:57,621 INFO L87 Difference]: Start difference. First operand 14150 states and 18954 transitions. Second operand has 3 states, 3 states have (on average 558.0) internal successors, (1674), 3 states have internal predecessors, (1674), 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) [2021-12-21 14:20:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:20:02,139 INFO L93 Difference]: Finished difference Result 35111 states and 48070 transitions. [2021-12-21 14:20:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:20:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 558.0) internal successors, (1674), 3 states have internal predecessors, (1674), 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 1674 [2021-12-21 14:20:02,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:20:02,213 INFO L225 Difference]: With dead ends: 35111 [2021-12-21 14:20:02,227 INFO L226 Difference]: Without dead ends: 20964 [2021-12-21 14:20:02,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:20:02,260 INFO L933 BasicCegarLoop]: 3747 mSDtfsCounter, 395 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 4794 mSolverCounterSat, 2206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 3988 SdHoareTripleChecker+Invalid, 7000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2206 IncrementalHoareTripleChecker+Valid, 4794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:20:02,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 3988 Invalid, 7000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2206 Valid, 4794 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-21 14:20:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20964 states. [2021-12-21 14:20:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20964 to 20958. [2021-12-21 14:20:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20958 states, 20957 states have (on average 1.2832943646514292) internal successors, (26894), 20957 states have internal predecessors, (26894), 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) [2021-12-21 14:20:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20958 states to 20958 states and 26894 transitions. [2021-12-21 14:20:02,518 INFO L78 Accepts]: Start accepts. Automaton has 20958 states and 26894 transitions. Word has length 1674 [2021-12-21 14:20:02,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:20:02,519 INFO L470 AbstractCegarLoop]: Abstraction has 20958 states and 26894 transitions. [2021-12-21 14:20:02,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 558.0) internal successors, (1674), 3 states have internal predecessors, (1674), 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) [2021-12-21 14:20:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 20958 states and 26894 transitions. [2021-12-21 14:20:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2021-12-21 14:20:02,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:20:02,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:20:02,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:20:02,574 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:20:02,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:20:02,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1695723327, now seen corresponding path program 1 times [2021-12-21 14:20:02,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:20:02,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499539358] [2021-12-21 14:20:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:20:02,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:20:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:20:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:20:03,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:20:03,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499539358] [2021-12-21 14:20:03,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499539358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:20:03,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:20:03,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:20:03,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643301011] [2021-12-21 14:20:03,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:20:03,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:20:03,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:20:03,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:20:03,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:20:03,014 INFO L87 Difference]: Start difference. First operand 20958 states and 26894 transitions. Second operand has 3 states, 3 states have (on average 562.6666666666666) internal successors, (1688), 3 states have internal predecessors, (1688), 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) [2021-12-21 14:20:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:20:08,096 INFO L93 Difference]: Finished difference Result 62366 states and 80052 transitions. [2021-12-21 14:20:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:20:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 562.6666666666666) internal successors, (1688), 3 states have internal predecessors, (1688), 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 1688 [2021-12-21 14:20:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:20:08,185 INFO L225 Difference]: With dead ends: 62366 [2021-12-21 14:20:08,185 INFO L226 Difference]: Without dead ends: 41411 [2021-12-21 14:20:08,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:20:08,213 INFO L933 BasicCegarLoop]: 3941 mSDtfsCounter, 1832 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 5427 mSolverCounterSat, 1899 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 4179 SdHoareTripleChecker+Invalid, 7326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1899 IncrementalHoareTripleChecker+Valid, 5427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:20:08,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1832 Valid, 4179 Invalid, 7326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1899 Valid, 5427 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-21 14:20:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41411 states. [2021-12-21 14:20:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41411 to 41348. [2021-12-21 14:20:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41348 states, 41347 states have (on average 1.1989503470626648) internal successors, (49573), 41347 states have internal predecessors, (49573), 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) [2021-12-21 14:20:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41348 states to 41348 states and 49573 transitions. [2021-12-21 14:20:08,687 INFO L78 Accepts]: Start accepts. Automaton has 41348 states and 49573 transitions. Word has length 1688 [2021-12-21 14:20:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:20:08,687 INFO L470 AbstractCegarLoop]: Abstraction has 41348 states and 49573 transitions. [2021-12-21 14:20:08,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 562.6666666666666) internal successors, (1688), 3 states have internal predecessors, (1688), 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) [2021-12-21 14:20:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 41348 states and 49573 transitions. [2021-12-21 14:20:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1693 [2021-12-21 14:20:08,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:20:08,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:20:08,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:20:08,774 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:20:08,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:20:08,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1849033794, now seen corresponding path program 1 times [2021-12-21 14:20:08,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:20:08,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977322766] [2021-12-21 14:20:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:20:08,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:20:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:20:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:20:09,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:20:09,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977322766] [2021-12-21 14:20:09,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977322766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:20:09,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:20:09,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:20:09,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784075775] [2021-12-21 14:20:09,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:20:09,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:20:09,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:20:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:20:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:20:09,361 INFO L87 Difference]: Start difference. First operand 41348 states and 49573 transitions. Second operand has 3 states, 3 states have (on average 564.0) internal successors, (1692), 2 states have internal predecessors, (1692), 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) [2021-12-21 14:20:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:20:14,236 INFO L93 Difference]: Finished difference Result 121768 states and 146175 transitions. [2021-12-21 14:20:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:20:14,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 564.0) internal successors, (1692), 2 states have internal predecessors, (1692), 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 1692 [2021-12-21 14:20:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:20:14,357 INFO L225 Difference]: With dead ends: 121768 [2021-12-21 14:20:14,358 INFO L226 Difference]: Without dead ends: 80423 [2021-12-21 14:20:14,404 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 [2021-12-21 14:20:14,405 INFO L933 BasicCegarLoop]: 1375 mSDtfsCounter, 2156 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 4972 mSolverCounterSat, 2513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2156 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 7485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2513 IncrementalHoareTripleChecker+Valid, 4972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:20:14,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2156 Valid, 1515 Invalid, 7485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2513 Valid, 4972 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-21 14:20:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80423 states. [2021-12-21 14:20:15,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80423 to 80406. [2021-12-21 14:20:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80406 states, 80405 states have (on average 1.1671164728561656) internal successors, (93842), 80405 states have internal predecessors, (93842), 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) [2021-12-21 14:20:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80406 states to 80406 states and 93842 transitions. [2021-12-21 14:20:15,222 INFO L78 Accepts]: Start accepts. Automaton has 80406 states and 93842 transitions. Word has length 1692 [2021-12-21 14:20:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:20:15,222 INFO L470 AbstractCegarLoop]: Abstraction has 80406 states and 93842 transitions. [2021-12-21 14:20:15,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 564.0) internal successors, (1692), 2 states have internal predecessors, (1692), 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) [2021-12-21 14:20:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 80406 states and 93842 transitions. [2021-12-21 14:20:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1703 [2021-12-21 14:20:15,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:20:15,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:20:15,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 14:20:15,317 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:20:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:20:15,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1707808169, now seen corresponding path program 1 times [2021-12-21 14:20:15,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:20:15,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626039116] [2021-12-21 14:20:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:20:15,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:20:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:20:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:20:15,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:20:15,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626039116] [2021-12-21 14:20:15,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626039116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:20:15,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:20:15,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:20:15,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708581388] [2021-12-21 14:20:15,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:20:15,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:20:15,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:20:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:20:15,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:20:15,748 INFO L87 Difference]: Start difference. First operand 80406 states and 93842 transitions. Second operand has 3 states, 3 states have (on average 567.3333333333334) internal successors, (1702), 2 states have internal predecessors, (1702), 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) [2021-12-21 14:20:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:20:19,834 INFO L93 Difference]: Finished difference Result 196460 states and 227061 transitions. [2021-12-21 14:20:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:20:19,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 567.3333333333334) internal successors, (1702), 2 states have internal predecessors, (1702), 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 1702 [2021-12-21 14:20:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:20:20,093 INFO L225 Difference]: With dead ends: 196460 [2021-12-21 14:20:20,094 INFO L226 Difference]: Without dead ends: 116057 [2021-12-21 14:20:20,116 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 [2021-12-21 14:20:20,116 INFO L933 BasicCegarLoop]: 1056 mSDtfsCounter, 3143 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4771 mSolverCounterSat, 1198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3143 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 5969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1198 IncrementalHoareTripleChecker+Valid, 4771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:20:20,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3143 Valid, 1139 Invalid, 5969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1198 Valid, 4771 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 14:20:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116057 states.