./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ee209640ee994f311a04b9c2d813fadfd34b19e8b71a748e88ebcbbe5883af1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 18:54:42,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 18:54:42,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 18:54:42,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 18:54:42,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 18:54:42,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 18:54:42,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 18:54:42,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 18:54:42,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 18:54:42,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 18:54:42,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 18:54:42,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 18:54:42,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 18:54:42,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 18:54:42,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 18:54:42,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 18:54:42,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 18:54:42,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 18:54:42,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 18:54:42,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 18:54:42,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 18:54:42,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 18:54:42,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 18:54:42,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 18:54:42,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 18:54:42,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 18:54:42,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 18:54:42,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 18:54:42,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 18:54:42,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 18:54:42,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 18:54:42,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 18:54:42,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 18:54:42,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 18:54:42,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 18:54:42,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 18:54:42,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 18:54:42,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 18:54:42,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 18:54:42,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 18:54:42,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 18:54:42,706 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 18:54:42,720 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 18:54:42,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 18:54:42,739 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 18:54:42,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 18:54:42,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 18:54:42,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 18:54:42,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 18:54:42,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 18:54:42,743 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 18:54:42,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 18:54:42,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 18:54:42,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 18:54:42,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 18:54:42,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 18:54:42,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 18:54:42,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 18:54:42,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 18:54:42,745 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 18:54:42,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 18:54:42,745 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 18:54:42,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 18:54:42,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 18:54:42,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 18:54:42,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 18:54:42,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:54:42,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 18:54:42,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 18:54:42,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 18:54:42,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 18:54:42,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 18:54:42,747 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 18:54:42,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 18:54:42,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 18:54:42,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 18:54:42,748 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ee209640ee994f311a04b9c2d813fadfd34b19e8b71a748e88ebcbbe5883af1 [2021-12-17 18:54:42,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 18:54:42,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 18:54:42,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 18:54:42,930 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 18:54:42,930 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 18:54:42,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c [2021-12-17 18:54:43,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8150075e6/6ab5821640f64e6bb4d1cd14cd14eeef/FLAGc0b5028ac [2021-12-17 18:54:43,726 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 18:54:43,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-2.c [2021-12-17 18:54:43,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8150075e6/6ab5821640f64e6bb4d1cd14cd14eeef/FLAGc0b5028ac [2021-12-17 18:54:43,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8150075e6/6ab5821640f64e6bb4d1cd14cd14eeef [2021-12-17 18:54:43,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 18:54:43,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 18:54:43,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 18:54:43,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 18:54:43,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 18:54:43,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:54:43" (1/1) ... [2021-12-17 18:54:43,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296ad171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:43, skipping insertion in model container [2021-12-17 18:54:43,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:54:43" (1/1) ... [2021-12-17 18:54:43,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 18:54:44,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 18:54:45,440 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_label43+token_ring.05.cil-2.c[381679,381692] [2021-12-17 18:54:45,464 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_label43+token_ring.05.cil-2.c[383339,383352] [2021-12-17 18:54:45,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:54:45,610 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 18:54:46,185 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_label43+token_ring.05.cil-2.c[381679,381692] [2021-12-17 18:54:46,188 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_label43+token_ring.05.cil-2.c[383339,383352] [2021-12-17 18:54:46,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:54:46,247 INFO L208 MainTranslator]: Completed translation [2021-12-17 18:54:46,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46 WrapperNode [2021-12-17 18:54:46,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 18:54:46,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 18:54:46,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 18:54:46,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 18:54:46,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,562 INFO L137 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12798 [2021-12-17 18:54:46,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 18:54:46,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 18:54:46,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 18:54:46,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 18:54:46,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 18:54:46,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 18:54:46,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 18:54:46,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 18:54:46,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (1/1) ... [2021-12-17 18:54:46,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:54:46,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:54:46,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 18:54:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 18:54:47,012 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 18:54:47,012 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 18:54:47,012 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 18:54:47,012 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 18:54:47,012 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 18:54:47,012 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 18:54:47,012 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-17 18:54:47,013 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-17 18:54:47,013 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 18:54:47,013 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 18:54:47,013 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 18:54:47,013 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 18:54:47,013 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 18:54:47,013 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 18:54:47,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 18:54:47,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 18:54:47,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 18:54:46,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 18:54:47,150 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 18:54:47,164 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 18:54:52,285 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 18:54:52,303 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 18:54:52,303 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-17 18:54:52,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:54:52 BoogieIcfgContainer [2021-12-17 18:54:52,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 18:54:52,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 18:54:52,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 18:54:52,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 18:54:52,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 06:54:43" (1/3) ... [2021-12-17 18:54:52,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f1d140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:54:52, skipping insertion in model container [2021-12-17 18:54:52,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:54:46" (2/3) ... [2021-12-17 18:54:52,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f1d140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:54:52, skipping insertion in model container [2021-12-17 18:54:52,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:54:52" (3/3) ... [2021-12-17 18:54:52,314 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.05.cil-2.c [2021-12-17 18:54:52,317 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 18:54:52,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 18:54:52,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 18:54:52,395 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 18:54:52,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 18:54:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 2398 states, 2367 states have (on average 1.85297845373891) internal successors, (4386), 2372 states have internal predecessors, (4386), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 18:54:52,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:54:52,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:54:52,447 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] [2021-12-17 18:54:52,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:54:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:54:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash -645844934, now seen corresponding path program 1 times [2021-12-17 18:54:52,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:54:52,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191443007] [2021-12-17 18:54:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:54:52,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:54:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:52,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:54:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:52,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:54:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:52,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:54:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:52,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:54:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:52,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:54:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:54:52,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:54:52,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191443007] [2021-12-17 18:54:52,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191443007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:54:52,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:54:52,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 18:54:52,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067308768] [2021-12-17 18:54:52,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:54:52,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 18:54:52,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:54:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 18:54:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 18:54:52,805 INFO L87 Difference]: Start difference. First operand has 2398 states, 2367 states have (on average 1.85297845373891) internal successors, (4386), 2372 states have internal predecessors, (4386), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:54:53,539 INFO L93 Difference]: Finished difference Result 4852 states and 8953 transitions. [2021-12-17 18:54:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 18:54:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:54:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:54:53,562 INFO L225 Difference]: With dead ends: 4852 [2021-12-17 18:54:53,562 INFO L226 Difference]: Without dead ends: 2395 [2021-12-17 18:54:53,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:54:53,574 INFO L933 BasicCegarLoop]: 4373 mSDtfsCounter, 521 mSDsluCounter, 12314 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 16687 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 18:54:53,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 16687 Invalid, 389 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 18:54:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-12-17 18:54:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2330. [2021-12-17 18:54:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2301 states have (on average 1.841373315949587) internal successors, (4237), 2304 states have internal predecessors, (4237), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 18:54:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 4277 transitions. [2021-12-17 18:54:53,704 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 4277 transitions. Word has length 102 [2021-12-17 18:54:53,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:54:53,705 INFO L470 AbstractCegarLoop]: Abstraction has 2330 states and 4277 transitions. [2021-12-17 18:54:53,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 4277 transitions. [2021-12-17 18:54:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:54:53,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:54:53,717 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] [2021-12-17 18:54:53,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 18:54:53,717 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:54:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:54:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1294737080, now seen corresponding path program 1 times [2021-12-17 18:54:53,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:54:53,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483793962] [2021-12-17 18:54:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:54:53,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:54:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:53,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:54:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:53,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:54:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:53,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:54:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:53,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:54:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:53,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:54:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:54:53,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:54:53,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483793962] [2021-12-17 18:54:53,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483793962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:54:53,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:54:53,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:54:53,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832381303] [2021-12-17 18:54:53,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:54:53,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:54:53,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:54:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:54:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:54:53,855 INFO L87 Difference]: Start difference. First operand 2330 states and 4277 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:54:55,093 INFO L93 Difference]: Finished difference Result 2856 states and 5108 transitions. [2021-12-17 18:54:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:54:55,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:54:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:54:55,102 INFO L225 Difference]: With dead ends: 2856 [2021-12-17 18:54:55,102 INFO L226 Difference]: Without dead ends: 2660 [2021-12-17 18:54:55,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:54:55,105 INFO L933 BasicCegarLoop]: 4328 mSDtfsCounter, 4721 mSDsluCounter, 12456 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4733 SdHoareTripleChecker+Valid, 16784 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:54:55,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4733 Valid, 16784 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 18:54:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-12-17 18:54:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2529. [2021-12-17 18:54:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.8217022993142395) internal successors, (4516), 2483 states have internal predecessors, (4516), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-17 18:54:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4587 transitions. [2021-12-17 18:54:55,240 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4587 transitions. Word has length 102 [2021-12-17 18:54:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:54:55,241 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4587 transitions. [2021-12-17 18:54:55,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4587 transitions. [2021-12-17 18:54:55,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:54:55,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:54:55,244 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] [2021-12-17 18:54:55,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 18:54:55,244 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:54:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:54:55,245 INFO L85 PathProgramCache]: Analyzing trace with hash -389078092, now seen corresponding path program 1 times [2021-12-17 18:54:55,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:54:55,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090465649] [2021-12-17 18:54:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:54:55,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:54:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:55,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:54:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:54:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:54:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:54:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:55,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:54:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:54:55,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:54:55,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090465649] [2021-12-17 18:54:55,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090465649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:54:55,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:54:55,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:54:55,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508581381] [2021-12-17 18:54:55,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:54:55,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:54:55,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:54:55,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:54:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:54:55,358 INFO L87 Difference]: Start difference. First operand 2529 states and 4587 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:56,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:54:56,663 INFO L93 Difference]: Finished difference Result 3324 states and 5839 transitions. [2021-12-17 18:54:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:54:56,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:54:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:54:56,674 INFO L225 Difference]: With dead ends: 3324 [2021-12-17 18:54:56,674 INFO L226 Difference]: Without dead ends: 2929 [2021-12-17 18:54:56,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:54:56,677 INFO L933 BasicCegarLoop]: 4485 mSDtfsCounter, 4725 mSDsluCounter, 16937 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4737 SdHoareTripleChecker+Valid, 21422 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:54:56,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4737 Valid, 21422 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 18:54:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2021-12-17 18:54:56,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 2715. [2021-12-17 18:54:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2644 states have (on average 1.8037065052950076) internal successors, (4769), 2649 states have internal predecessors, (4769), 49 states have call successors, (49), 19 states have call predecessors, (49), 20 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-17 18:54:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 4870 transitions. [2021-12-17 18:54:56,738 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 4870 transitions. Word has length 102 [2021-12-17 18:54:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:54:56,738 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 4870 transitions. [2021-12-17 18:54:56,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 4870 transitions. [2021-12-17 18:54:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:54:56,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:54:56,740 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] [2021-12-17 18:54:56,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 18:54:56,740 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:54:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:54:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404726, now seen corresponding path program 1 times [2021-12-17 18:54:56,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:54:56,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130713995] [2021-12-17 18:54:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:54:56,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:54:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:56,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:54:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:56,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:54:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:56,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:54:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:56,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:54:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:56,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:54:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:54:56,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:54:56,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130713995] [2021-12-17 18:54:56,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130713995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:54:56,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:54:56,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:54:56,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333850639] [2021-12-17 18:54:56,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:54:56,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:54:56,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:54:56,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:54:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:54:56,840 INFO L87 Difference]: Start difference. First operand 2715 states and 4870 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:54:58,307 INFO L93 Difference]: Finished difference Result 4012 states and 6910 transitions. [2021-12-17 18:54:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:54:58,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:54:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:54:58,318 INFO L225 Difference]: With dead ends: 4012 [2021-12-17 18:54:58,318 INFO L226 Difference]: Without dead ends: 3431 [2021-12-17 18:54:58,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:54:58,321 INFO L933 BasicCegarLoop]: 4473 mSDtfsCounter, 4719 mSDsluCounter, 16933 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4731 SdHoareTripleChecker+Valid, 21406 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 18:54:58,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4731 Valid, 21406 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 18:54:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-12-17 18:54:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 3091. [2021-12-17 18:54:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 2978 states have (on average 1.77367360644728) internal successors, (5282), 2985 states have internal predecessors, (5282), 77 states have call successors, (77), 31 states have call predecessors, (77), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-17 18:54:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 5447 transitions. [2021-12-17 18:54:58,394 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 5447 transitions. Word has length 102 [2021-12-17 18:54:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:54:58,399 INFO L470 AbstractCegarLoop]: Abstraction has 3091 states and 5447 transitions. [2021-12-17 18:54:58,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 5447 transitions. [2021-12-17 18:54:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:54:58,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:54:58,401 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] [2021-12-17 18:54:58,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 18:54:58,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:54:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:54:58,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1482706376, now seen corresponding path program 1 times [2021-12-17 18:54:58,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:54:58,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980584845] [2021-12-17 18:54:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:54:58,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:54:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:58,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:54:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:58,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:54:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:58,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:54:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:58,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:54:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:58,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:54:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:54:58,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:54:58,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980584845] [2021-12-17 18:54:58,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980584845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:54:58,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:54:58,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:54:58,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299722369] [2021-12-17 18:54:58,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:54:58,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:54:58,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:54:58,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:54:58,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:54:58,512 INFO L87 Difference]: Start difference. First operand 3091 states and 5447 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:54:59,801 INFO L93 Difference]: Finished difference Result 5346 states and 8979 transitions. [2021-12-17 18:54:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:54:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:54:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:54:59,816 INFO L225 Difference]: With dead ends: 5346 [2021-12-17 18:54:59,816 INFO L226 Difference]: Without dead ends: 4389 [2021-12-17 18:54:59,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:54:59,821 INFO L933 BasicCegarLoop]: 4468 mSDtfsCounter, 4718 mSDsluCounter, 16933 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4730 SdHoareTripleChecker+Valid, 21401 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:54:59,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4730 Valid, 21401 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 18:54:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4389 states. [2021-12-17 18:54:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4389 to 3844. [2021-12-17 18:54:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3647 states have (on average 1.7296408006580752) internal successors, (6308), 3658 states have internal predecessors, (6308), 133 states have call successors, (133), 55 states have call predecessors, (133), 62 states have return successors, (166), 138 states have call predecessors, (166), 131 states have call successors, (166) [2021-12-17 18:54:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 6607 transitions. [2021-12-17 18:54:59,914 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 6607 transitions. Word has length 102 [2021-12-17 18:54:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:54:59,914 INFO L470 AbstractCegarLoop]: Abstraction has 3844 states and 6607 transitions. [2021-12-17 18:54:59,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:54:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 6607 transitions. [2021-12-17 18:54:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:54:59,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:54:59,916 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] [2021-12-17 18:54:59,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 18:54:59,917 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:54:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:54:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash 84051574, now seen corresponding path program 1 times [2021-12-17 18:54:59,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:54:59,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377449737] [2021-12-17 18:54:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:54:59,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:54:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:59,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:54:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:59,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:54:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:59,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:54:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:59,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:54:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:59,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:54:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:54:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:54:59,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:54:59,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377449737] [2021-12-17 18:54:59,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377449737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:54:59,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:54:59,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:54:59,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482385842] [2021-12-17 18:54:59,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:54:59,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:54:59,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:54:59,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:54:59,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:54:59,990 INFO L87 Difference]: Start difference. First operand 3844 states and 6607 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:01,265 INFO L93 Difference]: Finished difference Result 8013 states and 13133 transitions. [2021-12-17 18:55:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:55:01,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:55:01,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:01,302 INFO L225 Difference]: With dead ends: 8013 [2021-12-17 18:55:01,303 INFO L226 Difference]: Without dead ends: 6303 [2021-12-17 18:55:01,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:55:01,311 INFO L933 BasicCegarLoop]: 4463 mSDtfsCounter, 4717 mSDsluCounter, 16933 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4729 SdHoareTripleChecker+Valid, 21396 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:01,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4729 Valid, 21396 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 18:55:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2021-12-17 18:55:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 5357. [2021-12-17 18:55:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5357 states, 4992 states have (on average 1.6766826923076923) internal successors, (8370), 5011 states have internal predecessors, (8370), 245 states have call successors, (245), 103 states have call predecessors, (245), 118 states have return successors, (340), 258 states have call predecessors, (340), 243 states have call successors, (340) [2021-12-17 18:55:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 8955 transitions. [2021-12-17 18:55:01,489 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 8955 transitions. Word has length 102 [2021-12-17 18:55:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:01,490 INFO L470 AbstractCegarLoop]: Abstraction has 5357 states and 8955 transitions. [2021-12-17 18:55:01,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 8955 transitions. [2021-12-17 18:55:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:55:01,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:01,494 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] [2021-12-17 18:55:01,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 18:55:01,494 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:01,495 INFO L85 PathProgramCache]: Analyzing trace with hash -973786504, now seen corresponding path program 1 times [2021-12-17 18:55:01,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:01,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915501694] [2021-12-17 18:55:01,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:01,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:01,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:01,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:01,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:01,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:01,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:55:01,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:01,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915501694] [2021-12-17 18:55:01,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915501694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:01,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:55:01,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:55:01,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091522211] [2021-12-17 18:55:01,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:01,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:55:01,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:55:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:55:01,589 INFO L87 Difference]: Start difference. First operand 5357 states and 8955 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:02,351 INFO L93 Difference]: Finished difference Result 9548 states and 15592 transitions. [2021-12-17 18:55:02,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:55:02,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:55:02,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:02,373 INFO L225 Difference]: With dead ends: 9548 [2021-12-17 18:55:02,374 INFO L226 Difference]: Without dead ends: 6325 [2021-12-17 18:55:02,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:55:02,384 INFO L933 BasicCegarLoop]: 4257 mSDtfsCounter, 4622 mSDsluCounter, 12279 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4635 SdHoareTripleChecker+Valid, 16536 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:02,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4635 Valid, 16536 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 18:55:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6325 states. [2021-12-17 18:55:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6325 to 5357. [2021-12-17 18:55:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5357 states, 4992 states have (on average 1.6732772435897436) internal successors, (8353), 5011 states have internal predecessors, (8353), 245 states have call successors, (245), 103 states have call predecessors, (245), 118 states have return successors, (340), 258 states have call predecessors, (340), 243 states have call successors, (340) [2021-12-17 18:55:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 8938 transitions. [2021-12-17 18:55:02,560 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 8938 transitions. Word has length 102 [2021-12-17 18:55:02,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:02,560 INFO L470 AbstractCegarLoop]: Abstraction has 5357 states and 8938 transitions. [2021-12-17 18:55:02,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 8938 transitions. [2021-12-17 18:55:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:55:02,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:02,563 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] [2021-12-17 18:55:02,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 18:55:02,564 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2116288970, now seen corresponding path program 1 times [2021-12-17 18:55:02,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:02,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751347743] [2021-12-17 18:55:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:02,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:02,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:02,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:02,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:02,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:55:02,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:02,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751347743] [2021-12-17 18:55:02,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751347743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:02,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:55:02,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:55:02,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643366839] [2021-12-17 18:55:02,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:02,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:55:02,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:55:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:55:02,635 INFO L87 Difference]: Start difference. First operand 5357 states and 8938 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:04,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:04,187 INFO L93 Difference]: Finished difference Result 14402 states and 23001 transitions. [2021-12-17 18:55:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:55:04,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:55:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:04,218 INFO L225 Difference]: With dead ends: 14402 [2021-12-17 18:55:04,218 INFO L226 Difference]: Without dead ends: 11179 [2021-12-17 18:55:04,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 18:55:04,229 INFO L933 BasicCegarLoop]: 4525 mSDtfsCounter, 4751 mSDsluCounter, 16922 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4762 SdHoareTripleChecker+Valid, 21447 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:04,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4762 Valid, 21447 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 18:55:04,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-12-17 18:55:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 8207. [2021-12-17 18:55:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8207 states, 7522 states have (on average 1.6193831427811751) internal successors, (12181), 7557 states have internal predecessors, (12181), 453 states have call successors, (453), 199 states have call predecessors, (453), 230 states have return successors, (726), 482 states have call predecessors, (726), 451 states have call successors, (726) [2021-12-17 18:55:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8207 states to 8207 states and 13360 transitions. [2021-12-17 18:55:04,466 INFO L78 Accepts]: Start accepts. Automaton has 8207 states and 13360 transitions. Word has length 102 [2021-12-17 18:55:04,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:04,467 INFO L470 AbstractCegarLoop]: Abstraction has 8207 states and 13360 transitions. [2021-12-17 18:55:04,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8207 states and 13360 transitions. [2021-12-17 18:55:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:55:04,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:04,471 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] [2021-12-17 18:55:04,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 18:55:04,472 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:04,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1876049224, now seen corresponding path program 1 times [2021-12-17 18:55:04,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:04,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119239981] [2021-12-17 18:55:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:04,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:04,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:04,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:04,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:04,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:04,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:55:04,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:04,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119239981] [2021-12-17 18:55:04,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119239981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:04,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:55:04,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:55:04,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63873411] [2021-12-17 18:55:04,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:04,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:55:04,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:55:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:55:04,538 INFO L87 Difference]: Start difference. First operand 8207 states and 13360 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:05,232 INFO L93 Difference]: Finished difference Result 16012 states and 25723 transitions. [2021-12-17 18:55:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:55:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:55:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:05,258 INFO L225 Difference]: With dead ends: 16012 [2021-12-17 18:55:05,258 INFO L226 Difference]: Without dead ends: 9939 [2021-12-17 18:55:05,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:55:05,276 INFO L933 BasicCegarLoop]: 4262 mSDtfsCounter, 4599 mSDsluCounter, 12280 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4612 SdHoareTripleChecker+Valid, 16542 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:05,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4612 Valid, 16542 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 18:55:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9939 states. [2021-12-17 18:55:05,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9939 to 8207. [2021-12-17 18:55:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8207 states, 7522 states have (on average 1.6149960116990163) internal successors, (12148), 7557 states have internal predecessors, (12148), 453 states have call successors, (453), 199 states have call predecessors, (453), 230 states have return successors, (726), 482 states have call predecessors, (726), 451 states have call successors, (726) [2021-12-17 18:55:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8207 states to 8207 states and 13327 transitions. [2021-12-17 18:55:05,592 INFO L78 Accepts]: Start accepts. Automaton has 8207 states and 13327 transitions. Word has length 102 [2021-12-17 18:55:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:05,592 INFO L470 AbstractCegarLoop]: Abstraction has 8207 states and 13327 transitions. [2021-12-17 18:55:05,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 8207 states and 13327 transitions. [2021-12-17 18:55:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:55:05,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:05,597 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] [2021-12-17 18:55:05,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 18:55:05,597 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:05,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1037015562, now seen corresponding path program 1 times [2021-12-17 18:55:05,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:05,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440238417] [2021-12-17 18:55:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:05,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:05,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:05,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:05,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:55:05,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:05,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440238417] [2021-12-17 18:55:05,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440238417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:05,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:55:05,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:55:05,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331705156] [2021-12-17 18:55:05,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:05,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:55:05,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:55:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:55:05,661 INFO L87 Difference]: Start difference. First operand 8207 states and 13327 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:07,346 INFO L93 Difference]: Finished difference Result 24624 states and 38857 transitions. [2021-12-17 18:55:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:55:07,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:55:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:07,408 INFO L225 Difference]: With dead ends: 24624 [2021-12-17 18:55:07,408 INFO L226 Difference]: Without dead ends: 18551 [2021-12-17 18:55:07,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 18:55:07,433 INFO L933 BasicCegarLoop]: 4437 mSDtfsCounter, 4800 mSDsluCounter, 16925 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4818 SdHoareTripleChecker+Valid, 21362 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:07,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4818 Valid, 21362 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 18:55:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18551 states. [2021-12-17 18:55:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18551 to 14081. [2021-12-17 18:55:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14081 states, 12772 states have (on average 1.5740682743501409) internal successors, (20104), 12839 states have internal predecessors, (20104), 853 states have call successors, (853), 391 states have call predecessors, (853), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-17 18:55:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14081 states to 14081 states and 22601 transitions. [2021-12-17 18:55:08,130 INFO L78 Accepts]: Start accepts. Automaton has 14081 states and 22601 transitions. Word has length 102 [2021-12-17 18:55:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:08,130 INFO L470 AbstractCegarLoop]: Abstraction has 14081 states and 22601 transitions. [2021-12-17 18:55:08,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 14081 states and 22601 transitions. [2021-12-17 18:55:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:55:08,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:08,139 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] [2021-12-17 18:55:08,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 18:55:08,140 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:08,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1009949960, now seen corresponding path program 1 times [2021-12-17 18:55:08,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:08,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796403992] [2021-12-17 18:55:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:08,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:08,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:08,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:08,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:08,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:55:08,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796403992] [2021-12-17 18:55:08,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796403992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:08,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:55:08,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:55:08,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623473121] [2021-12-17 18:55:08,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:08,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:55:08,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:55:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:55:08,208 INFO L87 Difference]: Start difference. First operand 14081 states and 22601 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:09,325 INFO L93 Difference]: Finished difference Result 29098 states and 46614 transitions. [2021-12-17 18:55:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:55:09,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:55:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:09,377 INFO L225 Difference]: With dead ends: 29098 [2021-12-17 18:55:09,377 INFO L226 Difference]: Without dead ends: 17151 [2021-12-17 18:55:09,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:55:09,404 INFO L933 BasicCegarLoop]: 4252 mSDtfsCounter, 4516 mSDsluCounter, 16350 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4529 SdHoareTripleChecker+Valid, 20602 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:09,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4529 Valid, 20602 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 18:55:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17151 states. [2021-12-17 18:55:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17151 to 14081. [2021-12-17 18:55:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14081 states, 12772 states have (on average 1.56897901659881) internal successors, (20039), 12839 states have internal predecessors, (20039), 853 states have call successors, (853), 391 states have call predecessors, (853), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-17 18:55:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14081 states to 14081 states and 22536 transitions. [2021-12-17 18:55:09,911 INFO L78 Accepts]: Start accepts. Automaton has 14081 states and 22536 transitions. Word has length 102 [2021-12-17 18:55:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:09,912 INFO L470 AbstractCegarLoop]: Abstraction has 14081 states and 22536 transitions. [2021-12-17 18:55:09,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 14081 states and 22536 transitions. [2021-12-17 18:55:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 18:55:09,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:09,919 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] [2021-12-17 18:55:09,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 18:55:09,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash 724154490, now seen corresponding path program 1 times [2021-12-17 18:55:09,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:09,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615440413] [2021-12-17 18:55:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:09,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:09,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:09,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:09,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:09,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:09,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:55:09,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615440413] [2021-12-17 18:55:09,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615440413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:09,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:55:09,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:55:09,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616296870] [2021-12-17 18:55:09,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:09,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:55:09,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:55:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:55:09,978 INFO L87 Difference]: Start difference. First operand 14081 states and 22536 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:11,804 INFO L93 Difference]: Finished difference Result 36427 states and 57254 transitions. [2021-12-17 18:55:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:55:11,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-17 18:55:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:11,939 INFO L225 Difference]: With dead ends: 36427 [2021-12-17 18:55:11,955 INFO L226 Difference]: Without dead ends: 24481 [2021-12-17 18:55:11,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 18:55:12,011 INFO L933 BasicCegarLoop]: 4568 mSDtfsCounter, 4921 mSDsluCounter, 12546 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4952 SdHoareTripleChecker+Valid, 17114 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:12,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4952 Valid, 17114 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 18:55:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24481 states. [2021-12-17 18:55:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24481 to 19980. [2021-12-17 18:55:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19980 states, 17994 states have (on average 1.5410692453039903) internal successors, (27730), 18126 states have internal predecessors, (27730), 1300 states have call successors, (1300), 589 states have call predecessors, (1300), 684 states have return successors, (2335), 1328 states have call predecessors, (2335), 1298 states have call successors, (2335) [2021-12-17 18:55:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19980 states to 19980 states and 31365 transitions. [2021-12-17 18:55:12,798 INFO L78 Accepts]: Start accepts. Automaton has 19980 states and 31365 transitions. Word has length 102 [2021-12-17 18:55:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:12,798 INFO L470 AbstractCegarLoop]: Abstraction has 19980 states and 31365 transitions. [2021-12-17 18:55:12,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:55:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 19980 states and 31365 transitions. [2021-12-17 18:55:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-17 18:55:12,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:12,835 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:55:12,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 18:55:12,836 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1880616710, now seen corresponding path program 1 times [2021-12-17 18:55:12,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:12,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465696135] [2021-12-17 18:55:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:12,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:12,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:12,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:12,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:12,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:12,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:12,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 18:55:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:55:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:12,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 18:55:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:55:12,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:12,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465696135] [2021-12-17 18:55:12,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465696135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:55:12,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273144714] [2021-12-17 18:55:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:12,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:55:12,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:55:12,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:55:12,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 18:55:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:55:13,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:55:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 18:55:13,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:55:13,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273144714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:13,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:55:13,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:55:13,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895574185] [2021-12-17 18:55:13,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:13,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:55:13,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:13,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:55:13,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:55:13,272 INFO L87 Difference]: Start difference. First operand 19980 states and 31365 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:55:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:14,288 INFO L93 Difference]: Finished difference Result 55323 states and 86233 transitions. [2021-12-17 18:55:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:55:14,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-12-17 18:55:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:14,505 INFO L225 Difference]: With dead ends: 55323 [2021-12-17 18:55:14,506 INFO L226 Difference]: Without dead ends: 37478 [2021-12-17 18:55:14,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:55:14,594 INFO L933 BasicCegarLoop]: 4284 mSDtfsCounter, 4220 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4220 SdHoareTripleChecker+Valid, 4569 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:14,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4220 Valid, 4569 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:55:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37478 states. [2021-12-17 18:55:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37478 to 37278. [2021-12-17 18:55:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37278 states, 33364 states have (on average 1.5195719937657355) internal successors, (50699), 33625 states have internal predecessors, (50699), 2544 states have call successors, (2544), 1177 states have call predecessors, (2544), 1368 states have return successors, (4553), 2539 states have call predecessors, (4553), 2542 states have call successors, (4553) [2021-12-17 18:55:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37278 states to 37278 states and 57796 transitions. [2021-12-17 18:55:16,606 INFO L78 Accepts]: Start accepts. Automaton has 37278 states and 57796 transitions. Word has length 165 [2021-12-17 18:55:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:16,608 INFO L470 AbstractCegarLoop]: Abstraction has 37278 states and 57796 transitions. [2021-12-17 18:55:16,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:55:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 37278 states and 57796 transitions. [2021-12-17 18:55:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-17 18:55:16,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:16,742 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:55:16,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 18:55:16,943 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,SelfDestructingSolverStorable12 [2021-12-17 18:55:16,943 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:16,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1261756442, now seen corresponding path program 1 times [2021-12-17 18:55:16,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:16,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787546122] [2021-12-17 18:55:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:16,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:16,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:16,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:17,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:17,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:17,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 18:55:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:17,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:55:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:17,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 18:55:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:55:17,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:17,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787546122] [2021-12-17 18:55:17,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787546122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:55:17,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750580577] [2021-12-17 18:55:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:17,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:55:17,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:55:17,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:55:17,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 18:55:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:17,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:55:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:55:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 18:55:17,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:55:17,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750580577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:17,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:55:17,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:55:17,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048416749] [2021-12-17 18:55:17,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:17,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:55:17,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:17,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:55:17,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:55:17,351 INFO L87 Difference]: Start difference. First operand 37278 states and 57796 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:55:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:19,605 INFO L93 Difference]: Finished difference Result 106583 states and 165158 transitions. [2021-12-17 18:55:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:55:19,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-12-17 18:55:19,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:19,806 INFO L225 Difference]: With dead ends: 106583 [2021-12-17 18:55:19,807 INFO L226 Difference]: Without dead ends: 71440 [2021-12-17 18:55:19,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:55:19,885 INFO L933 BasicCegarLoop]: 4284 mSDtfsCounter, 4214 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4214 SdHoareTripleChecker+Valid, 4569 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:19,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4214 Valid, 4569 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:55:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71440 states. [2021-12-17 18:55:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71440 to 71044. [2021-12-17 18:55:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71044 states, 63420 states have (on average 1.5083412172816146) internal successors, (95659), 63939 states have internal predecessors, (95659), 4886 states have call successors, (4886), 2353 states have call predecessors, (4886), 2736 states have return successors, (8843), 4815 states have call predecessors, (8843), 4884 states have call successors, (8843) [2021-12-17 18:55:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71044 states to 71044 states and 109388 transitions. [2021-12-17 18:55:22,953 INFO L78 Accepts]: Start accepts. Automaton has 71044 states and 109388 transitions. Word has length 165 [2021-12-17 18:55:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:22,954 INFO L470 AbstractCegarLoop]: Abstraction has 71044 states and 109388 transitions. [2021-12-17 18:55:22,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:55:22,954 INFO L276 IsEmpty]: Start isEmpty. Operand 71044 states and 109388 transitions. [2021-12-17 18:55:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-17 18:55:23,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:23,056 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:55:23,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 18:55:23,271 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,SelfDestructingSolverStorable13 [2021-12-17 18:55:23,271 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2006157114, now seen corresponding path program 1 times [2021-12-17 18:55:23,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:23,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774461372] [2021-12-17 18:55:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:23,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 18:55:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:55:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 18:55:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:55:23,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774461372] [2021-12-17 18:55:23,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774461372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:55:23,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38714407] [2021-12-17 18:55:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:23,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:55:23,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:55:23,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:55:23,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 18:55:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:23,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:55:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:55:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 18:55:23,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:55:23,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38714407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:23,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:55:23,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:55:23,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297800549] [2021-12-17 18:55:23,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:23,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:55:23,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:23,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:55:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:55:23,690 INFO L87 Difference]: Start difference. First operand 71044 states and 109388 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:55:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:55:28,821 INFO L93 Difference]: Finished difference Result 206901 states and 319532 transitions. [2021-12-17 18:55:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:55:28,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-12-17 18:55:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:55:29,325 INFO L225 Difference]: With dead ends: 206901 [2021-12-17 18:55:29,326 INFO L226 Difference]: Without dead ends: 137992 [2021-12-17 18:55:29,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:55:29,464 INFO L933 BasicCegarLoop]: 4284 mSDtfsCounter, 4202 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 4569 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:55:29,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4202 Valid, 4569 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:55:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137992 states. [2021-12-17 18:55:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137992 to 137204. [2021-12-17 18:55:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137204 states, 122356 states have (on average 1.5022965772009547) internal successors, (183815), 123391 states have internal predecessors, (183815), 9374 states have call successors, (9374), 4705 states have call predecessors, (9374), 5472 states have return successors, (17227), 9171 states have call predecessors, (17227), 9372 states have call successors, (17227) [2021-12-17 18:55:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137204 states to 137204 states and 210416 transitions. [2021-12-17 18:55:35,248 INFO L78 Accepts]: Start accepts. Automaton has 137204 states and 210416 transitions. Word has length 165 [2021-12-17 18:55:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:55:35,249 INFO L470 AbstractCegarLoop]: Abstraction has 137204 states and 210416 transitions. [2021-12-17 18:55:35,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:55:35,249 INFO L276 IsEmpty]: Start isEmpty. Operand 137204 states and 210416 transitions. [2021-12-17 18:55:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-17 18:55:35,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:55:35,683 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:55:35,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 18:55:35,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:55:35,901 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:55:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:55:35,901 INFO L85 PathProgramCache]: Analyzing trace with hash 945544794, now seen corresponding path program 1 times [2021-12-17 18:55:35,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:55:35,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725592099] [2021-12-17 18:55:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:35,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:55:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:35,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:55:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:35,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:55:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:35,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:55:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:36,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:55:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:36,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:55:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:36,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 18:55:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:36,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:55:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:36,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 18:55:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:55:36,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:55:36,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725592099] [2021-12-17 18:55:36,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725592099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:55:36,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756510600] [2021-12-17 18:55:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:55:36,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:55:36,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:55:36,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:55:36,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 18:55:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:55:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:55:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:55:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 18:55:36,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:55:36,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756510600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:55:36,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:55:36,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:55:36,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165066737] [2021-12-17 18:55:36,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:55:36,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:55:36,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:55:36,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:55:36,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:55:36,389 INFO L87 Difference]: Start difference. First operand 137204 states and 210416 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)