./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ec37a095871269c822e7d35e6d840f2de134a68f657807281a5c0e96980df26 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:36:49,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:36:49,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:36:49,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:36:49,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:36:49,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:36:49,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:36:49,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:36:49,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:36:49,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:36:49,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:36:49,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:36:49,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:36:49,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:36:49,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:36:49,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:36:49,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:36:49,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:36:49,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:36:49,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:36:49,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:36:49,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:36:49,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:36:49,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:36:50,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:36:50,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:36:50,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:36:50,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:36:50,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:36:50,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:36:50,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:36:50,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:36:50,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:36:50,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:36:50,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:36:50,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:36:50,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:36:50,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:36:50,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:36:50,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:36:50,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:36:50,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:36:50,028 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:36:50,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:36:50,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:36:50,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:36:50,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:36:50,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:36:50,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:36:50,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:36:50,029 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:36:50,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:36:50,030 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:36:50,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:36:50,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:36:50,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:36:50,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:36:50,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:36:50,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:36:50,030 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:36:50,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:36:50,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:36:50,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:36:50,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:36:50,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:36:50,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:36:50,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:36:50,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:36:50,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:36:50,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:36:50,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:36:50,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:36:50,032 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:36:50,032 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:36:50,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:36:50,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:36:50,032 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ec37a095871269c822e7d35e6d840f2de134a68f657807281a5c0e96980df26 [2021-12-22 12:36:50,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:36:50,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:36:50,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:36:50,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:36:50,251 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:36:50,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c [2021-12-22 12:36:50,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbb767010/f5d72be2d30741209a7a0d6212184f2c/FLAGb3ff66e55 [2021-12-22 12:36:50,998 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:36:50,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c [2021-12-22 12:36:51,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbb767010/f5d72be2d30741209a7a0d6212184f2c/FLAGb3ff66e55 [2021-12-22 12:36:51,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbb767010/f5d72be2d30741209a7a0d6212184f2c [2021-12-22 12:36:51,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:36:51,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:36:51,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:36:51,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:36:51,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:36:51,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:36:51" (1/1) ... [2021-12-22 12:36:51,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37c85983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:51, skipping insertion in model container [2021-12-22 12:36:51,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:36:51" (1/1) ... [2021-12-22 12:36:51,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:36:51,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:36:52,956 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_label45+token_ring.03.cil-1.c[380323,380336] [2021-12-22 12:36:52,977 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_label45+token_ring.03.cil-1.c[383339,383352] [2021-12-22 12:36:53,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:36:53,119 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:36:53,786 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_label45+token_ring.03.cil-1.c[380323,380336] [2021-12-22 12:36:53,790 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_label45+token_ring.03.cil-1.c[383339,383352] [2021-12-22 12:36:53,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:36:53,861 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:36:53,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53 WrapperNode [2021-12-22 12:36:53,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:36:53,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:36:53,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:36:53,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:36:53,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:53,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:54,239 INFO L137 Inliner]: procedures = 50, calls = 51, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 12682 [2021-12-22 12:36:54,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:36:54,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:36:54,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:36:54,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:36:54,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:54,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:54,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:54,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:54,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:54,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:54,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:54,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:36:54,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:36:54,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:36:54,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:36:54,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (1/1) ... [2021-12-22 12:36:54,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:36:54,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:36:54,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 12:36:54,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 12:36:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:36:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-22 12:36:54,743 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-22 12:36:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 12:36:54,743 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 12:36:54,743 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-22 12:36:54,743 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-22 12:36:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-22 12:36:54,744 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-22 12:36:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-22 12:36:54,744 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-22 12:36:54,744 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-22 12:36:54,744 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-22 12:36:54,745 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-22 12:36:54,745 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-22 12:36:54,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:36:54,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:36:54,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:36:54,861 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:36:54,862 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:36:59,658 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:36:59,680 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:36:59,680 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-22 12:36:59,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:36:59 BoogieIcfgContainer [2021-12-22 12:36:59,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:36:59,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:36:59,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:36:59,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:36:59,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:36:51" (1/3) ... [2021-12-22 12:36:59,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cb5f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:36:59, skipping insertion in model container [2021-12-22 12:36:59,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:36:53" (2/3) ... [2021-12-22 12:36:59,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cb5f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:36:59, skipping insertion in model container [2021-12-22 12:36:59,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:36:59" (3/3) ... [2021-12-22 12:36:59,696 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.03.cil-1.c [2021-12-22 12:36:59,704 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:36:59,704 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:36:59,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:36:59,755 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 12:36:59,756 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:36:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 2348 states, 2319 states have (on average 1.8559724018973696) internal successors, (4304), 2324 states have internal predecessors, (4304), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-22 12:36:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 12:36:59,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:36:59,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:36:59,800 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:36:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:36:59,804 INFO L85 PathProgramCache]: Analyzing trace with hash 520182233, now seen corresponding path program 1 times [2021-12-22 12:36:59,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:36:59,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582820768] [2021-12-22 12:36:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:36:59,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:36:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:36:59,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:36:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:00,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:00,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582820768] [2021-12-22 12:37:00,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582820768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:00,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:00,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:37:00,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898851567] [2021-12-22 12:37:00,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:00,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:37:00,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:00,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:37:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:37:00,122 INFO L87 Difference]: Start difference. First operand has 2348 states, 2319 states have (on average 1.8559724018973696) internal successors, (4304), 2324 states have internal predecessors, (4304), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:00,963 INFO L93 Difference]: Finished difference Result 4921 states and 9054 transitions. [2021-12-22 12:37:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:37:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 12:37:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:00,983 INFO L225 Difference]: With dead ends: 4921 [2021-12-22 12:37:00,983 INFO L226 Difference]: Without dead ends: 2514 [2021-12-22 12:37:00,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 12:37:00,992 INFO L933 BasicCegarLoop]: 4299 mSDtfsCounter, 4559 mSDsluCounter, 12541 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4569 SdHoareTripleChecker+Valid, 16840 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:00,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4569 Valid, 16840 Invalid, 759 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [88 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:37:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-12-22 12:37:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2427. [2021-12-22 12:37:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2381 states have (on average 1.8299034019319613) internal successors, (4357), 2385 states have internal predecessors, (4357), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-22 12:37:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 4420 transitions. [2021-12-22 12:37:01,093 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 4420 transitions. Word has length 80 [2021-12-22 12:37:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:01,093 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 4420 transitions. [2021-12-22 12:37:01,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 4420 transitions. [2021-12-22 12:37:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 12:37:01,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:01,169 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] [2021-12-22 12:37:01,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:37:01,169 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash -721258283, now seen corresponding path program 1 times [2021-12-22 12:37:01,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:01,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959362633] [2021-12-22 12:37:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:01,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:01,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:01,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959362633] [2021-12-22 12:37:01,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959362633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:01,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:01,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:37:01,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162590648] [2021-12-22 12:37:01,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:01,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:37:01,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:37:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:37:01,317 INFO L87 Difference]: Start difference. First operand 2427 states and 4420 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:02,167 INFO L93 Difference]: Finished difference Result 3000 states and 5300 transitions. [2021-12-22 12:37:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:37:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 12:37:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:02,177 INFO L225 Difference]: With dead ends: 3000 [2021-12-22 12:37:02,177 INFO L226 Difference]: Without dead ends: 2705 [2021-12-22 12:37:02,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 12:37:02,180 INFO L933 BasicCegarLoop]: 4344 mSDtfsCounter, 4483 mSDsluCounter, 16678 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4493 SdHoareTripleChecker+Valid, 21022 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:02,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4493 Valid, 21022 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:37:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-12-22 12:37:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2565. [2021-12-22 12:37:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2500 states have (on average 1.8144) internal successors, (4536), 2505 states have internal predecessors, (4536), 43 states have call successors, (43), 19 states have call predecessors, (43), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-22 12:37:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4625 transitions. [2021-12-22 12:37:02,229 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4625 transitions. Word has length 80 [2021-12-22 12:37:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:02,230 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 4625 transitions. [2021-12-22 12:37:02,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4625 transitions. [2021-12-22 12:37:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 12:37:02,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:02,232 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] [2021-12-22 12:37:02,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:37:02,232 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:02,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1887529175, now seen corresponding path program 1 times [2021-12-22 12:37:02,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:02,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368829743] [2021-12-22 12:37:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:02,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:02,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:02,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368829743] [2021-12-22 12:37:02,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368829743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:02,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:02,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:37:02,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301551982] [2021-12-22 12:37:02,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:02,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:37:02,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:02,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:37:02,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:37:02,330 INFO L87 Difference]: Start difference. First operand 2565 states and 4625 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:03,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:03,162 INFO L93 Difference]: Finished difference Result 3497 states and 6053 transitions. [2021-12-22 12:37:03,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:37:03,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 12:37:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:03,172 INFO L225 Difference]: With dead ends: 3497 [2021-12-22 12:37:03,172 INFO L226 Difference]: Without dead ends: 3064 [2021-12-22 12:37:03,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 12:37:03,175 INFO L933 BasicCegarLoop]: 4336 mSDtfsCounter, 4480 mSDsluCounter, 16674 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4490 SdHoareTripleChecker+Valid, 21010 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:03,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4490 Valid, 21010 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:37:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-12-22 12:37:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2842. [2021-12-22 12:37:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2739 states have (on average 1.78714859437751) internal successors, (4895), 2746 states have internal predecessors, (4895), 67 states have call successors, (67), 31 states have call predecessors, (67), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-22 12:37:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 5040 transitions. [2021-12-22 12:37:03,246 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 5040 transitions. Word has length 80 [2021-12-22 12:37:03,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:03,247 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 5040 transitions. [2021-12-22 12:37:03,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 5040 transitions. [2021-12-22 12:37:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 12:37:03,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:03,250 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] [2021-12-22 12:37:03,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:37:03,250 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:03,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1833136277, now seen corresponding path program 1 times [2021-12-22 12:37:03,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:03,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468596946] [2021-12-22 12:37:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:03,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:03,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:03,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468596946] [2021-12-22 12:37:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468596946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:03,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:03,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:37:03,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142386571] [2021-12-22 12:37:03,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:03,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:37:03,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:03,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:37:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:37:03,352 INFO L87 Difference]: Start difference. First operand 2842 states and 5040 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:04,287 INFO L93 Difference]: Finished difference Result 4458 states and 7508 transitions. [2021-12-22 12:37:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:37:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 12:37:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:04,302 INFO L225 Difference]: With dead ends: 4458 [2021-12-22 12:37:04,302 INFO L226 Difference]: Without dead ends: 3748 [2021-12-22 12:37:04,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 12:37:04,307 INFO L933 BasicCegarLoop]: 4332 mSDtfsCounter, 4476 mSDsluCounter, 16674 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4486 SdHoareTripleChecker+Valid, 21006 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:04,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4486 Valid, 21006 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:37:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-12-22 12:37:04,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3397. [2021-12-22 12:37:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3218 states have (on average 1.7442510876320696) internal successors, (5613), 3229 states have internal predecessors, (5613), 115 states have call successors, (115), 55 states have call predecessors, (115), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-22 12:37:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5876 transitions. [2021-12-22 12:37:04,396 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5876 transitions. Word has length 80 [2021-12-22 12:37:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:04,397 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 5876 transitions. [2021-12-22 12:37:04,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5876 transitions. [2021-12-22 12:37:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 12:37:04,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:04,399 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] [2021-12-22 12:37:04,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:37:04,399 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:04,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1415739671, now seen corresponding path program 1 times [2021-12-22 12:37:04,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:04,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74135288] [2021-12-22 12:37:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:04,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:04,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:04,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74135288] [2021-12-22 12:37:04,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74135288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:04,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:04,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:37:04,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848031190] [2021-12-22 12:37:04,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:04,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:37:04,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:04,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:37:04,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:37:04,483 INFO L87 Difference]: Start difference. First operand 3397 states and 5876 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:05,470 INFO L93 Difference]: Finished difference Result 6787 states and 11028 transitions. [2021-12-22 12:37:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:37:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 12:37:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:05,490 INFO L225 Difference]: With dead ends: 6787 [2021-12-22 12:37:05,490 INFO L226 Difference]: Without dead ends: 5522 [2021-12-22 12:37:05,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:37:05,497 INFO L933 BasicCegarLoop]: 4326 mSDtfsCounter, 4607 mSDsluCounter, 16666 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4621 SdHoareTripleChecker+Valid, 20992 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:05,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4621 Valid, 20992 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 12:37:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2021-12-22 12:37:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 4488. [2021-12-22 12:37:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4165 states have (on average 1.6900360144057622) internal successors, (7039), 4184 states have internal predecessors, (7039), 203 states have call successors, (203), 103 states have call predecessors, (203), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2021-12-22 12:37:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 7540 transitions. [2021-12-22 12:37:05,637 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 7540 transitions. Word has length 80 [2021-12-22 12:37:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:05,637 INFO L470 AbstractCegarLoop]: Abstraction has 4488 states and 7540 transitions. [2021-12-22 12:37:05,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 7540 transitions. [2021-12-22 12:37:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 12:37:05,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:05,640 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] [2021-12-22 12:37:05,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:37:05,641 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2095011925, now seen corresponding path program 1 times [2021-12-22 12:37:05,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:05,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868618708] [2021-12-22 12:37:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:05,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:05,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:05,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:05,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:05,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:05,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868618708] [2021-12-22 12:37:05,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868618708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:05,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:05,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:37:05,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760399685] [2021-12-22 12:37:05,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:05,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:37:05,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:05,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:37:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:37:05,720 INFO L87 Difference]: Start difference. First operand 4488 states and 7540 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:06,810 INFO L93 Difference]: Finished difference Result 10772 states and 17130 transitions. [2021-12-22 12:37:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:37:06,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 12:37:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:06,841 INFO L225 Difference]: With dead ends: 10772 [2021-12-22 12:37:06,842 INFO L226 Difference]: Without dead ends: 8416 [2021-12-22 12:37:06,889 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 [2021-12-22 12:37:06,890 INFO L933 BasicCegarLoop]: 4363 mSDtfsCounter, 4493 mSDsluCounter, 16663 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4502 SdHoareTripleChecker+Valid, 21026 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:06,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4502 Valid, 21026 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 12:37:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8416 states. [2021-12-22 12:37:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8416 to 6499. [2021-12-22 12:37:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6499 states, 5896 states have (on average 1.6290705563093624) internal successors, (9605), 5931 states have internal predecessors, (9605), 371 states have call successors, (371), 199 states have call predecessors, (371), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2021-12-22 12:37:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6499 states to 6499 states and 10620 transitions. [2021-12-22 12:37:07,086 INFO L78 Accepts]: Start accepts. Automaton has 6499 states and 10620 transitions. Word has length 80 [2021-12-22 12:37:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:07,086 INFO L470 AbstractCegarLoop]: Abstraction has 6499 states and 10620 transitions. [2021-12-22 12:37:07,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 6499 states and 10620 transitions. [2021-12-22 12:37:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 12:37:07,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:07,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:37:07,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:37:07,091 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:07,092 INFO L85 PathProgramCache]: Analyzing trace with hash -238380713, now seen corresponding path program 1 times [2021-12-22 12:37:07,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:07,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207881845] [2021-12-22 12:37:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:07,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:07,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:07,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:07,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:07,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:07,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:07,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:07,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207881845] [2021-12-22 12:37:07,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207881845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:07,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:07,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:37:07,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972206847] [2021-12-22 12:37:07,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:07,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:37:07,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:07,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:37:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:37:07,167 INFO L87 Difference]: Start difference. First operand 6499 states and 10620 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:08,245 INFO L93 Difference]: Finished difference Result 17486 states and 27496 transitions. [2021-12-22 12:37:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:37:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 12:37:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:08,297 INFO L225 Difference]: With dead ends: 17486 [2021-12-22 12:37:08,297 INFO L226 Difference]: Without dead ends: 13119 [2021-12-22 12:37:08,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:37:08,317 INFO L933 BasicCegarLoop]: 4313 mSDtfsCounter, 4484 mSDsluCounter, 16666 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 20979 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:08,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4498 Valid, 20979 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:37:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13119 states. [2021-12-22 12:37:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13119 to 10695. [2021-12-22 12:37:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10695 states, 9548 states have (on average 1.581587767071638) internal successors, (15101), 9615 states have internal predecessors, (15101), 691 states have call successors, (691), 391 states have call predecessors, (691), 454 states have return successors, (1482), 752 states have call predecessors, (1482), 689 states have call successors, (1482) [2021-12-22 12:37:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10695 states to 10695 states and 17274 transitions. [2021-12-22 12:37:08,742 INFO L78 Accepts]: Start accepts. Automaton has 10695 states and 17274 transitions. Word has length 80 [2021-12-22 12:37:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:08,744 INFO L470 AbstractCegarLoop]: Abstraction has 10695 states and 17274 transitions. [2021-12-22 12:37:08,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 10695 states and 17274 transitions. [2021-12-22 12:37:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 12:37:08,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:08,751 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] [2021-12-22 12:37:08,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:37:08,751 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 322319065, now seen corresponding path program 1 times [2021-12-22 12:37:08,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:08,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122682349] [2021-12-22 12:37:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:08,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:37:08,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:08,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122682349] [2021-12-22 12:37:08,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122682349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:08,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:37:08,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:37:08,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874422246] [2021-12-22 12:37:08,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:08,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:37:08,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:37:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:37:08,809 INFO L87 Difference]: Start difference. First operand 10695 states and 17274 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:09,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:09,881 INFO L93 Difference]: Finished difference Result 26313 states and 41362 transitions. [2021-12-22 12:37:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:37:09,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (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 80 [2021-12-22 12:37:09,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:09,935 INFO L225 Difference]: With dead ends: 26313 [2021-12-22 12:37:09,935 INFO L226 Difference]: Without dead ends: 17751 [2021-12-22 12:37:09,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-22 12:37:09,971 INFO L933 BasicCegarLoop]: 4400 mSDtfsCounter, 4644 mSDsluCounter, 12372 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4671 SdHoareTripleChecker+Valid, 16772 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:09,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4671 Valid, 16772 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 12:37:09,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17751 states. [2021-12-22 12:37:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17751 to 14888. [2021-12-22 12:37:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14888 states, 13146 states have (on average 1.5442720219078045) internal successors, (20301), 13278 states have internal predecessors, (20301), 1056 states have call successors, (1056), 589 states have call predecessors, (1056), 684 states have return successors, (2091), 1084 states have call predecessors, (2091), 1054 states have call successors, (2091) [2021-12-22 12:37:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14888 states to 14888 states and 23448 transitions. [2021-12-22 12:37:10,559 INFO L78 Accepts]: Start accepts. Automaton has 14888 states and 23448 transitions. Word has length 80 [2021-12-22 12:37:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:10,559 INFO L470 AbstractCegarLoop]: Abstraction has 14888 states and 23448 transitions. [2021-12-22 12:37:10,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (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) [2021-12-22 12:37:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 14888 states and 23448 transitions. [2021-12-22 12:37:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 12:37:10,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:10,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:37:10,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:37:10,593 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:10,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2072406432, now seen corresponding path program 1 times [2021-12-22 12:37:10,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:10,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341734673] [2021-12-22 12:37:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:10,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 12:37:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 12:37:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:37:10,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:10,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341734673] [2021-12-22 12:37:10,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341734673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362684688] [2021-12-22 12:37:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:10,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:10,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:10,709 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:10,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:37:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:10,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:10,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 12:37:11,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:11,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362684688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:11,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:11,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:37:11,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631499236] [2021-12-22 12:37:11,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:11,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:11,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:11,017 INFO L87 Difference]: Start difference. First operand 14888 states and 23448 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (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) [2021-12-22 12:37:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:11,757 INFO L93 Difference]: Finished difference Result 40051 states and 62244 transitions. [2021-12-22 12:37:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (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 129 [2021-12-22 12:37:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:11,849 INFO L225 Difference]: With dead ends: 40051 [2021-12-22 12:37:11,849 INFO L226 Difference]: Without dead ends: 27296 [2021-12-22 12:37:11,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:11,889 INFO L933 BasicCegarLoop]: 4204 mSDtfsCounter, 4148 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4148 SdHoareTripleChecker+Valid, 4414 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:11,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4148 Valid, 4414 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:11,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27296 states. [2021-12-22 12:37:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27296 to 27096. [2021-12-22 12:37:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27096 states, 23670 states have (on average 1.514321926489227) internal successors, (35844), 23931 states have internal predecessors, (35844), 2056 states have call successors, (2056), 1177 states have call predecessors, (2056), 1368 states have return successors, (4065), 2051 states have call predecessors, (4065), 2054 states have call successors, (4065) [2021-12-22 12:37:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27096 states to 27096 states and 41965 transitions. [2021-12-22 12:37:12,950 INFO L78 Accepts]: Start accepts. Automaton has 27096 states and 41965 transitions. Word has length 129 [2021-12-22 12:37:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:12,951 INFO L470 AbstractCegarLoop]: Abstraction has 27096 states and 41965 transitions. [2021-12-22 12:37:12,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (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) [2021-12-22 12:37:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 27096 states and 41965 transitions. [2021-12-22 12:37:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 12:37:13,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:13,005 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:37:13,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 12:37:13,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:13,219 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash -853257536, now seen corresponding path program 1 times [2021-12-22 12:37:13,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:13,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970097187] [2021-12-22 12:37:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:13,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 12:37:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 12:37:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:37:13,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:13,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970097187] [2021-12-22 12:37:13,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970097187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:13,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168410308] [2021-12-22 12:37:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:13,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:13,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:13,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:13,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 12:37:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:13,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 12:37:13,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:13,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168410308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:13,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:13,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:37:13,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096147193] [2021-12-22 12:37:13,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:13,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:13,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:13,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:13,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:13,591 INFO L87 Difference]: Start difference. First operand 27096 states and 41965 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (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) [2021-12-22 12:37:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:14,826 INFO L93 Difference]: Finished difference Result 76329 states and 117663 transitions. [2021-12-22 12:37:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:14,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (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 129 [2021-12-22 12:37:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:15,018 INFO L225 Difference]: With dead ends: 76329 [2021-12-22 12:37:15,018 INFO L226 Difference]: Without dead ends: 51366 [2021-12-22 12:37:15,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:15,090 INFO L933 BasicCegarLoop]: 4204 mSDtfsCounter, 4142 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4142 SdHoareTripleChecker+Valid, 4414 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:15,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4142 Valid, 4414 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51366 states. [2021-12-22 12:37:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51366 to 50970. [2021-12-22 12:37:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50970 states, 44226 states have (on average 1.4955908289241622) internal successors, (66144), 44745 states have internal predecessors, (66144), 4006 states have call successors, (4006), 2353 states have call predecessors, (4006), 2736 states have return successors, (7963), 3935 states have call predecessors, (7963), 4004 states have call successors, (7963) [2021-12-22 12:37:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50970 states to 50970 states and 78113 transitions. [2021-12-22 12:37:16,984 INFO L78 Accepts]: Start accepts. Automaton has 50970 states and 78113 transitions. Word has length 129 [2021-12-22 12:37:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:16,984 INFO L470 AbstractCegarLoop]: Abstraction has 50970 states and 78113 transitions. [2021-12-22 12:37:16,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (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) [2021-12-22 12:37:16,985 INFO L276 IsEmpty]: Start isEmpty. Operand 50970 states and 78113 transitions. [2021-12-22 12:37:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 12:37:17,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:17,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:37:17,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:17,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 12:37:17,275 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:17,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2127588384, now seen corresponding path program 1 times [2021-12-22 12:37:17,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:17,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480173038] [2021-12-22 12:37:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:17,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 12:37:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 12:37:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 12:37:17,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:17,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480173038] [2021-12-22 12:37:17,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480173038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:17,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735644697] [2021-12-22 12:37:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:17,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:17,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:17,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 12:37:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 12:37:17,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:17,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735644697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:17,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:17,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:17,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592929936] [2021-12-22 12:37:17,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:17,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:17,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:17,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:17,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:17,635 INFO L87 Difference]: Start difference. First operand 50970 states and 78113 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-12-22 12:37:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:20,696 INFO L93 Difference]: Finished difference Result 146009 states and 224673 transitions. [2021-12-22 12:37:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) Word has length 129 [2021-12-22 12:37:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:21,123 INFO L225 Difference]: With dead ends: 146009 [2021-12-22 12:37:21,123 INFO L226 Difference]: Without dead ends: 97173 [2021-12-22 12:37:21,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:21,248 INFO L933 BasicCegarLoop]: 4394 mSDtfsCounter, 194 mSDsluCounter, 4192 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 8586 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:21,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 8586 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97173 states. [2021-12-22 12:37:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97173 to 97173. [2021-12-22 12:37:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97173 states, 83954 states have (on average 1.4752245277175595) internal successors, (123851), 84858 states have internal predecessors, (123851), 7745 states have call successors, (7745), 4705 states have call predecessors, (7745), 5472 states have return successors, (17046), 7737 states have call predecessors, (17046), 7743 states have call successors, (17046) [2021-12-22 12:37:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97173 states to 97173 states and 148642 transitions. [2021-12-22 12:37:25,110 INFO L78 Accepts]: Start accepts. Automaton has 97173 states and 148642 transitions. Word has length 129 [2021-12-22 12:37:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:25,111 INFO L470 AbstractCegarLoop]: Abstraction has 97173 states and 148642 transitions. [2021-12-22 12:37:25,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-12-22 12:37:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 97173 states and 148642 transitions. [2021-12-22 12:37:25,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 12:37:25,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:25,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:37:25,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:25,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:25,620 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:25,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash -318020336, now seen corresponding path program 1 times [2021-12-22 12:37:25,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:25,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870654772] [2021-12-22 12:37:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:25,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 12:37:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:37:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-22 12:37:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-22 12:37:25,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:25,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870654772] [2021-12-22 12:37:25,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870654772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:25,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284382226] [2021-12-22 12:37:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:25,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:25,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:25,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:25,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 12:37:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:26,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:26,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 12:37:26,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:26,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284382226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:26,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:26,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 12:37:26,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889596009] [2021-12-22 12:37:26,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:26,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:26,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:26,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:26,303 INFO L87 Difference]: Start difference. First operand 97173 states and 148642 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:37:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:37:31,932 INFO L93 Difference]: Finished difference Result 282449 states and 433585 transitions. [2021-12-22 12:37:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:37:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 167 [2021-12-22 12:37:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:37:32,893 INFO L225 Difference]: With dead ends: 282449 [2021-12-22 12:37:32,893 INFO L226 Difference]: Without dead ends: 187415 [2021-12-22 12:37:33,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:33,090 INFO L933 BasicCegarLoop]: 4207 mSDtfsCounter, 4098 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 4417 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:37:33,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 4417 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:37:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187415 states. [2021-12-22 12:37:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187415 to 185843. [2021-12-22 12:37:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185843 states, 160780 states have (on average 1.4701890782435627) internal successors, (236377), 162584 states have internal predecessors, (236377), 14407 states have call successors, (14407), 9119 states have call predecessors, (14407), 10654 states have return successors, (32274), 14267 states have call predecessors, (32274), 14405 states have call successors, (32274) [2021-12-22 12:37:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185843 states to 185843 states and 283058 transitions. [2021-12-22 12:37:40,575 INFO L78 Accepts]: Start accepts. Automaton has 185843 states and 283058 transitions. Word has length 167 [2021-12-22 12:37:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:37:40,576 INFO L470 AbstractCegarLoop]: Abstraction has 185843 states and 283058 transitions. [2021-12-22 12:37:40,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 12:37:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 185843 states and 283058 transitions. [2021-12-22 12:37:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-22 12:37:41,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:37:41,465 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 12:37:41,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 12:37:41,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:41,675 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:37:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:37:41,676 INFO L85 PathProgramCache]: Analyzing trace with hash 159535236, now seen corresponding path program 1 times [2021-12-22 12:37:41,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:37:41,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829738895] [2021-12-22 12:37:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:41,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:37:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 12:37:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:37:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 12:37:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:37:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 12:37:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 12:37:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 12:37:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-22 12:37:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-22 12:37:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-22 12:37:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-22 12:37:41,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:37:41,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829738895] [2021-12-22 12:37:41,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829738895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:37:41,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439317423] [2021-12-22 12:37:41,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:37:41,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:37:41,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:37:41,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:37:41,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 12:37:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:37:41,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 12:37:41,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:37:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 12:37:42,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:37:42,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439317423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:37:42,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:37:42,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 12:37:42,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411572945] [2021-12-22 12:37:42,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:37:42,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:37:42,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:37:42,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:37:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:37:42,125 INFO L87 Difference]: Start difference. First operand 185843 states and 283058 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)