./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 198234a6cbed333832b896acc347872fc09d4c349ed801953a7aa6331aa2ab3f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 18:58:07,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 18:58:07,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 18:58:07,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 18:58:07,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 18:58:07,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 18:58:07,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 18:58:07,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 18:58:07,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 18:58:07,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 18:58:07,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 18:58:07,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 18:58:07,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 18:58:07,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 18:58:07,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 18:58:07,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 18:58:07,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 18:58:07,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 18:58:07,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 18:58:07,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 18:58:08,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 18:58:08,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 18:58:08,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 18:58:08,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 18:58:08,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 18:58:08,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 18:58:08,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 18:58:08,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 18:58:08,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 18:58:08,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 18:58:08,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 18:58:08,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 18:58:08,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 18:58:08,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 18:58:08,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 18:58:08,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 18:58:08,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 18:58:08,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 18:58:08,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 18:58:08,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 18:58:08,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 18:58:08,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 18:58:08,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 18:58:08,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 18:58:08,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 18:58:08,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 18:58:08,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 18:58:08,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 18:58:08,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 18:58:08,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 18:58:08,045 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 18:58:08,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 18:58:08,046 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 18:58:08,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 18:58:08,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 18:58:08,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 18:58:08,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 18:58:08,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 18:58:08,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 18:58:08,047 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 18:58:08,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 18:58:08,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 18:58:08,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 18:58:08,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 18:58:08,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 18:58:08,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 18:58:08,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:58:08,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 18:58:08,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 18:58:08,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 18:58:08,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 18:58:08,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 18:58:08,050 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 18:58:08,050 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 18:58:08,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 18:58:08,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 18:58:08,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 198234a6cbed333832b896acc347872fc09d4c349ed801953a7aa6331aa2ab3f [2021-12-17 18:58:08,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 18:58:08,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 18:58:08,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 18:58:08,256 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 18:58:08,256 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 18:58:08,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-2.c [2021-12-17 18:58:08,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d720ac7a/eb46ec7af4724946be4c27b7e1b926cf/FLAG97a4b1689 [2021-12-17 18:58:08,933 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 18:58:08,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-2.c [2021-12-17 18:58:08,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d720ac7a/eb46ec7af4724946be4c27b7e1b926cf/FLAG97a4b1689 [2021-12-17 18:58:09,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d720ac7a/eb46ec7af4724946be4c27b7e1b926cf [2021-12-17 18:58:09,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 18:58:09,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 18:58:09,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 18:58:09,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 18:58:09,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 18:58:09,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:58:09" (1/1) ... [2021-12-17 18:58:09,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a473c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:09, skipping insertion in model container [2021-12-17 18:58:09,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:58:09" (1/1) ... [2021-12-17 18:58:09,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 18:58:09,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 18:58:10,769 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-2.c[380323,380336] [2021-12-17 18:58:10,785 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-2.c[383339,383352] [2021-12-17 18:58:10,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:58:10,893 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 18:58:11,529 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-2.c[380323,380336] [2021-12-17 18:58:11,534 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-2.c[383339,383352] [2021-12-17 18:58:11,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:58:11,590 INFO L208 MainTranslator]: Completed translation [2021-12-17 18:58:11,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11 WrapperNode [2021-12-17 18:58:11,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 18:58:11,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 18:58:11,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 18:58:11,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 18:58:11,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:11,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:11,915 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-12-17 18:58:11,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 18:58:11,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 18:58:11,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 18:58:11,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 18:58:11,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:11,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:11,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:11,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:12,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:12,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:12,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:12,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 18:58:12,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 18:58:12,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 18:58:12,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 18:58:12,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (1/1) ... [2021-12-17 18:58:12,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:58:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:58:12,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 18:58:12,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 18:58:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 18:58:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 18:58:12,500 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 18:58:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 18:58:12,503 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 18:58:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 18:58:12,503 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 18:58:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 18:58:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 18:58:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 18:58:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 18:58:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 18:58:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 18:58:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 18:58:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 18:58:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 18:58:12,575 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 18:58:12,576 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 18:58:17,599 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 18:58:17,617 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 18:58:17,617 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-17 18:58:17,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:58:17 BoogieIcfgContainer [2021-12-17 18:58:17,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 18:58:17,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 18:58:17,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 18:58:17,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 18:58:17,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 06:58:09" (1/3) ... [2021-12-17 18:58:17,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191fe42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:58:17, skipping insertion in model container [2021-12-17 18:58:17,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:58:11" (2/3) ... [2021-12-17 18:58:17,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191fe42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:58:17, skipping insertion in model container [2021-12-17 18:58:17,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:58:17" (3/3) ... [2021-12-17 18:58:17,625 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.03.cil-2.c [2021-12-17 18:58:17,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 18:58:17,628 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 18:58:17,662 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 18:58:17,666 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 18:58:17,667 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 18:58:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 18:58:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:58:17,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:17,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:17,707 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:17,710 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-12-17 18:58:17,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:17,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872544226] [2021-12-17 18:58:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:17,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:17,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:17,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:17,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:17,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:17,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:58:17,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:17,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872544226] [2021-12-17 18:58:17,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872544226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:17,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:58:17,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:58:17,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157649840] [2021-12-17 18:58:17,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:17,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:58:17,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:58:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:58:17,929 INFO L87 Difference]: Start difference. First operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:18,940 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-12-17 18:58:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:58:18,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:58:18,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:18,959 INFO L225 Difference]: With dead ends: 4899 [2021-12-17 18:58:18,960 INFO L226 Difference]: Without dead ends: 2500 [2021-12-17 18:58:18,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:58:18,968 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:18,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 18:58:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-17 18:58:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-12-17 18:58:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8291859974694222) internal successors, (4337), 2374 states have internal predecessors, (4337), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-17 18:58:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-12-17 18:58:19,057 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-12-17 18:58:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:19,058 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-12-17 18:58:19,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-12-17 18:58:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:58:19,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:19,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:19,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 18:58:19,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:19,063 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-12-17 18:58:19,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:19,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660308829] [2021-12-17 18:58:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:19,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:19,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:19,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:19,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:19,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:19,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:58:19,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:19,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660308829] [2021-12-17 18:58:19,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660308829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:19,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:58:19,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:58:19,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357427190] [2021-12-17 18:58:19,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:19,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:58:19,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:19,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:58:19,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:58:19,246 INFO L87 Difference]: Start difference. First operand 2415 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:20,159 INFO L93 Difference]: Finished difference Result 2969 states and 5244 transitions. [2021-12-17 18:58:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:58:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:58:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:20,170 INFO L225 Difference]: With dead ends: 2969 [2021-12-17 18:58:20,170 INFO L226 Difference]: Without dead ends: 2686 [2021-12-17 18:58:20,172 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 [2021-12-17 18:58:20,173 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 4469 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20915 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:20,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20915 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:58:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-12-17 18:58:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2548. [2021-12-17 18:58:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2485 states have (on average 1.8132796780684104) internal successors, (4506), 2489 states have internal predecessors, (4506), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-17 18:58:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4593 transitions. [2021-12-17 18:58:20,234 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4593 transitions. Word has length 79 [2021-12-17 18:58:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:20,234 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4593 transitions. [2021-12-17 18:58:20,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4593 transitions. [2021-12-17 18:58:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:58:20,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:20,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:20,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 18:58:20,237 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:20,238 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-12-17 18:58:20,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:20,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933737289] [2021-12-17 18:58:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:20,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:20,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:20,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:20,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:20,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:20,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:58:20,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:20,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933737289] [2021-12-17 18:58:20,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933737289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:20,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:58:20,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:58:20,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464016017] [2021-12-17 18:58:20,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:20,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:58:20,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:20,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:58:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:58:20,313 INFO L87 Difference]: Start difference. First operand 2548 states and 4593 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:21,317 INFO L93 Difference]: Finished difference Result 3451 states and 5967 transitions. [2021-12-17 18:58:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:58:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:58:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:21,328 INFO L225 Difference]: With dead ends: 3451 [2021-12-17 18:58:21,328 INFO L226 Difference]: Without dead ends: 3035 [2021-12-17 18:58:21,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:58:21,331 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4466 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 20903 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:21,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 20903 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:58:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-12-17 18:58:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2815. [2021-12-17 18:58:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2714 states have (on average 1.7851879145173175) internal successors, (4845), 2720 states have internal predecessors, (4845), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-17 18:58:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 4988 transitions. [2021-12-17 18:58:21,434 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 4988 transitions. Word has length 79 [2021-12-17 18:58:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:21,434 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 4988 transitions. [2021-12-17 18:58:21,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:21,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 4988 transitions. [2021-12-17 18:58:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:58:21,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:21,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:21,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 18:58:21,437 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:21,437 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-12-17 18:58:21,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:21,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76164417] [2021-12-17 18:58:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:21,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:21,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:21,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:21,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:21,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:21,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:58:21,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:21,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76164417] [2021-12-17 18:58:21,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76164417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:21,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:58:21,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:58:21,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620453453] [2021-12-17 18:58:21,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:21,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:58:21,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:21,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:58:21,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:58:21,529 INFO L87 Difference]: Start difference. First operand 2815 states and 4988 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:22,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:22,410 INFO L93 Difference]: Finished difference Result 4382 states and 7362 transitions. [2021-12-17 18:58:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:58:22,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:58:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:22,425 INFO L225 Difference]: With dead ends: 4382 [2021-12-17 18:58:22,425 INFO L226 Difference]: Without dead ends: 3699 [2021-12-17 18:58:22,428 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 [2021-12-17 18:58:22,429 INFO L933 BasicCegarLoop]: 4308 mSDtfsCounter, 4462 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 20899 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:22,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4472 Valid, 20899 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:58:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-12-17 18:58:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3350. [2021-12-17 18:58:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7406240151276395) internal successors, (5523), 3183 states have internal predecessors, (5523), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 18:58:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5784 transitions. [2021-12-17 18:58:22,506 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5784 transitions. Word has length 79 [2021-12-17 18:58:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:22,507 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5784 transitions. [2021-12-17 18:58:22,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5784 transitions. [2021-12-17 18:58:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:58:22,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:22,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:22,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 18:58:22,509 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:22,510 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-12-17 18:58:22,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:22,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758255085] [2021-12-17 18:58:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:22,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:22,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:22,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:22,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:22,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:58:22,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:22,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758255085] [2021-12-17 18:58:22,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758255085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:22,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:58:22,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:58:22,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240228119] [2021-12-17 18:58:22,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:22,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:58:22,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:22,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:58:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:58:22,575 INFO L87 Difference]: Start difference. First operand 3350 states and 5784 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:22,965 INFO L93 Difference]: Finished difference Result 4914 states and 8177 transitions. [2021-12-17 18:58:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:58:22,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:58:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:22,978 INFO L225 Difference]: With dead ends: 4914 [2021-12-17 18:58:22,978 INFO L226 Difference]: Without dead ends: 3696 [2021-12-17 18:58:22,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:58:22,983 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4396 mSDsluCounter, 12153 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4407 SdHoareTripleChecker+Valid, 16322 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:22,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4407 Valid, 16322 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 18:58:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-12-17 18:58:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3350. [2021-12-17 18:58:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7377875827292784) internal successors, (5514), 3183 states have internal predecessors, (5514), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 18:58:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5775 transitions. [2021-12-17 18:58:23,059 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5775 transitions. Word has length 79 [2021-12-17 18:58:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:23,059 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5775 transitions. [2021-12-17 18:58:23,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5775 transitions. [2021-12-17 18:58:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:58:23,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:23,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:23,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 18:58:23,061 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:23,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:23,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-12-17 18:58:23,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:23,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678063296] [2021-12-17 18:58:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:23,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:23,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:23,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:23,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:23,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:23,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:58:23,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:23,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678063296] [2021-12-17 18:58:23,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678063296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:23,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:58:23,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:58:23,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740663515] [2021-12-17 18:58:23,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:23,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:58:23,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:58:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:58:23,137 INFO L87 Difference]: Start difference. First operand 3350 states and 5775 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:24,112 INFO L93 Difference]: Finished difference Result 6544 states and 10562 transitions. [2021-12-17 18:58:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:58:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:58:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:24,130 INFO L225 Difference]: With dead ends: 6544 [2021-12-17 18:58:24,130 INFO L226 Difference]: Without dead ends: 5326 [2021-12-17 18:58:24,134 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 [2021-12-17 18:58:24,135 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 4475 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4484 SdHoareTripleChecker+Valid, 20917 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:24,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4484 Valid, 20917 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:58:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-12-17 18:58:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4369. [2021-12-17 18:58:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4048 states have (on average 1.679100790513834) internal successors, (6797), 4066 states have internal predecessors, (6797), 201 states have call successors, (201), 102 states have call predecessors, (201), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2021-12-17 18:58:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 7296 transitions. [2021-12-17 18:58:24,242 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 7296 transitions. Word has length 79 [2021-12-17 18:58:24,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:24,242 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 7296 transitions. [2021-12-17 18:58:24,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:24,243 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 7296 transitions. [2021-12-17 18:58:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:58:24,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:24,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:24,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 18:58:24,245 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-12-17 18:58:24,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:24,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976714567] [2021-12-17 18:58:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:24,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:24,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:24,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:24,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:24,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:58:24,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:24,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976714567] [2021-12-17 18:58:24,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976714567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:24,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:58:24,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:58:24,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374525501] [2021-12-17 18:58:24,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:24,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:58:24,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:58:24,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:58:24,305 INFO L87 Difference]: Start difference. First operand 4369 states and 7296 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:25,184 INFO L93 Difference]: Finished difference Result 9937 states and 15669 transitions. [2021-12-17 18:58:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:58:25,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:58:25,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:25,212 INFO L225 Difference]: With dead ends: 9937 [2021-12-17 18:58:25,212 INFO L226 Difference]: Without dead ends: 7700 [2021-12-17 18:58:25,222 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 [2021-12-17 18:58:25,222 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4466 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4480 SdHoareTripleChecker+Valid, 20870 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:25,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4480 Valid, 20870 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 18:58:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7700 states. [2021-12-17 18:58:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7700 to 6452. [2021-12-17 18:58:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 5851 states have (on average 1.6169885489659888) internal successors, (9461), 5885 states have internal predecessors, (9461), 369 states have call successors, (369), 198 states have call predecessors, (369), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2021-12-17 18:58:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 10474 transitions. [2021-12-17 18:58:25,407 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 10474 transitions. Word has length 79 [2021-12-17 18:58:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:25,408 INFO L470 AbstractCegarLoop]: Abstraction has 6452 states and 10474 transitions. [2021-12-17 18:58:25,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 10474 transitions. [2021-12-17 18:58:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:58:25,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:25,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:25,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 18:58:25,427 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-12-17 18:58:25,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:25,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654978751] [2021-12-17 18:58:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:25,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:25,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:25,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:25,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:25,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:58:25,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:25,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654978751] [2021-12-17 18:58:25,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654978751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:25,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:58:25,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:58:25,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735037197] [2021-12-17 18:58:25,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:25,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:58:25,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:58:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:58:25,493 INFO L87 Difference]: Start difference. First operand 6452 states and 10474 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:26,417 INFO L93 Difference]: Finished difference Result 14451 states and 22576 transitions. [2021-12-17 18:58:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:58:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:58:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:26,472 INFO L225 Difference]: With dead ends: 14451 [2021-12-17 18:58:26,472 INFO L226 Difference]: Without dead ends: 10132 [2021-12-17 18:58:26,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 18:58:26,488 INFO L933 BasicCegarLoop]: 4386 mSDtfsCounter, 4626 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4653 SdHoareTripleChecker+Valid, 16731 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:26,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4653 Valid, 16731 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 18:58:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10132 states. [2021-12-17 18:58:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10132 to 8642. [2021-12-17 18:58:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 7726 states have (on average 1.572741392699974) internal successors, (12151), 7793 states have internal predecessors, (12151), 566 states have call successors, (566), 300 states have call predecessors, (566), 348 states have return successors, (923), 580 states have call predecessors, (923), 566 states have call successors, (923) [2021-12-17 18:58:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 13640 transitions. [2021-12-17 18:58:26,707 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 13640 transitions. Word has length 79 [2021-12-17 18:58:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:26,709 INFO L470 AbstractCegarLoop]: Abstraction has 8642 states and 13640 transitions. [2021-12-17 18:58:26,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:58:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 13640 transitions. [2021-12-17 18:58:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:58:26,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:26,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:26,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 18:58:26,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:26,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:26,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-12-17 18:58:26,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:26,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127985269] [2021-12-17 18:58:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:26,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:26,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:26,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:26,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:26,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:26,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:58:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:26,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:58:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:26,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:58:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:58:26,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:26,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127985269] [2021-12-17 18:58:26,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127985269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:58:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113498733] [2021-12-17 18:58:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:26,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:58:26,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:58:26,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:58:26,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 18:58:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:27,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:58:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:58:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 18:58:27,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:58:27,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113498733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:27,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:58:27,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:58:27,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119722707] [2021-12-17 18:58:27,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:27,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:58:27,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:58:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:27,363 INFO L87 Difference]: Start difference. First operand 8642 states and 13640 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:58:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:27,600 INFO L93 Difference]: Finished difference Result 21481 states and 32916 transitions. [2021-12-17 18:58:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:58:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-17 18:58:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:27,639 INFO L225 Difference]: With dead ends: 21481 [2021-12-17 18:58:27,639 INFO L226 Difference]: Without dead ends: 14972 [2021-12-17 18:58:27,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:27,661 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4135 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4135 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:27,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4135 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:58:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14972 states. [2021-12-17 18:58:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14972 to 14870. [2021-12-17 18:58:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14870 states, 13070 states have (on average 1.5247130833970926) internal successors, (19928), 13202 states have internal predecessors, (19928), 1102 states have call successors, (1102), 600 states have call predecessors, (1102), 696 states have return successors, (1785), 1099 states have call predecessors, (1785), 1102 states have call successors, (1785) [2021-12-17 18:58:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14870 states to 14870 states and 22815 transitions. [2021-12-17 18:58:28,571 INFO L78 Accepts]: Start accepts. Automaton has 14870 states and 22815 transitions. Word has length 128 [2021-12-17 18:58:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:28,571 INFO L470 AbstractCegarLoop]: Abstraction has 14870 states and 22815 transitions. [2021-12-17 18:58:28,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:58:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 14870 states and 22815 transitions. [2021-12-17 18:58:28,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:58:28,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:28,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:28,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 18:58:28,817 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 [2021-12-17 18:58:28,817 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:28,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-12-17 18:58:28,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:28,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274385738] [2021-12-17 18:58:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:28,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:28,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:28,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:28,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:28,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:28,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:58:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:28,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:58:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:28,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:58:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:58:28,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:28,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274385738] [2021-12-17 18:58:28,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274385738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:58:28,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744245087] [2021-12-17 18:58:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:28,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:58:28,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:58:28,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:58:28,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 18:58:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:58:29,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:58:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 18:58:29,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:58:29,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744245087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:29,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:58:29,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:58:29,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115611845] [2021-12-17 18:58:29,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:29,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:58:29,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:58:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:29,211 INFO L87 Difference]: Start difference. First operand 14870 states and 22815 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:58:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:29,858 INFO L93 Difference]: Finished difference Result 39843 states and 60157 transitions. [2021-12-17 18:58:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:58:29,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-17 18:58:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:29,936 INFO L225 Difference]: With dead ends: 39843 [2021-12-17 18:58:29,936 INFO L226 Difference]: Without dead ends: 27106 [2021-12-17 18:58:29,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:29,976 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4129 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4129 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:29,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4129 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:58:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27106 states. [2021-12-17 18:58:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27106 to 26904. [2021-12-17 18:58:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 23410 states have (on average 1.494404100811619) internal successors, (34984), 23672 states have internal predecessors, (34984), 2100 states have call successors, (2100), 1200 states have call predecessors, (2100), 1392 states have return successors, (3435), 2063 states have call predecessors, (3435), 2100 states have call successors, (3435) [2021-12-17 18:58:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 40519 transitions. [2021-12-17 18:58:30,861 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 40519 transitions. Word has length 128 [2021-12-17 18:58:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:30,862 INFO L470 AbstractCegarLoop]: Abstraction has 26904 states and 40519 transitions. [2021-12-17 18:58:30,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:58:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 40519 transitions. [2021-12-17 18:58:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:58:30,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:30,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:30,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 18:58:31,115 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 [2021-12-17 18:58:31,116 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-12-17 18:58:31,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:31,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828599033] [2021-12-17 18:58:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:31,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:58:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:58:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:58:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:58:31,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:31,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828599033] [2021-12-17 18:58:31,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828599033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:58:31,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834339224] [2021-12-17 18:58:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:31,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:58:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:58:31,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:58:31,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 18:58:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:58:31,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:58:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 18:58:31,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:58:31,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834339224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:31,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:58:31,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:58:31,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971624154] [2021-12-17 18:58:31,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:31,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:58:31,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:31,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:58:31,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:31,480 INFO L87 Difference]: Start difference. First operand 26904 states and 40519 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 18:58:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:32,794 INFO L93 Difference]: Finished difference Result 75433 states and 113453 transitions. [2021-12-17 18:58:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:58:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2021-12-17 18:58:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:32,961 INFO L225 Difference]: With dead ends: 75433 [2021-12-17 18:58:32,961 INFO L226 Difference]: Without dead ends: 50663 [2021-12-17 18:58:33,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:33,002 INFO L933 BasicCegarLoop]: 4380 mSDtfsCounter, 193 mSDsluCounter, 4179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 8559 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 [2021-12-17 18:58:33,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 8559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:58:33,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50663 states. [2021-12-17 18:58:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50663 to 50663. [2021-12-17 18:58:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50663 states, 43814 states have (on average 1.4695531108778017) internal successors, (64387), 44269 states have internal predecessors, (64387), 4063 states have call successors, (4063), 2400 states have call predecessors, (4063), 2784 states have return successors, (7494), 4057 states have call predecessors, (7494), 4063 states have call successors, (7494) [2021-12-17 18:58:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50663 states to 50663 states and 75944 transitions. [2021-12-17 18:58:34,838 INFO L78 Accepts]: Start accepts. Automaton has 50663 states and 75944 transitions. Word has length 128 [2021-12-17 18:58:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:34,839 INFO L470 AbstractCegarLoop]: Abstraction has 50663 states and 75944 transitions. [2021-12-17 18:58:34,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 18:58:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 50663 states and 75944 transitions. [2021-12-17 18:58:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 18:58:34,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:34,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:34,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 18:58:35,175 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 [2021-12-17 18:58:35,175 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-12-17 18:58:35,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:35,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085383872] [2021-12-17 18:58:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:35,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:58:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:58:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 18:58:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:58:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 18:58:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 18:58:35,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:35,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085383872] [2021-12-17 18:58:35,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085383872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:58:35,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672378835] [2021-12-17 18:58:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:35,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:58:35,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:58:35,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:58:35,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 18:58:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:58:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:58:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 18:58:35,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:58:35,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672378835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:35,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:58:35,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:58:35,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298350863] [2021-12-17 18:58:35,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:35,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:58:35,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:35,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:58:35,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:35,661 INFO L87 Difference]: Start difference. First operand 50663 states and 75944 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 18:58:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:38,288 INFO L93 Difference]: Finished difference Result 145415 states and 218067 transitions. [2021-12-17 18:58:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:58:38,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-12-17 18:58:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:38,609 INFO L225 Difference]: With dead ends: 145415 [2021-12-17 18:58:38,609 INFO L226 Difference]: Without dead ends: 96891 [2021-12-17 18:58:38,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:38,724 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4085 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 4397 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:38,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4085 Valid, 4397 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:58:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96891 states. [2021-12-17 18:58:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96891 to 96089. [2021-12-17 18:58:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96089 states, 82996 states have (on average 1.4590703166417658) internal successors, (121097), 83903 states have internal predecessors, (121097), 7621 states have call successors, (7621), 4702 states have call predecessors, (7621), 5470 states have return successors, (14146), 7547 states have call predecessors, (14146), 7621 states have call successors, (14146) [2021-12-17 18:58:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96089 states to 96089 states and 142864 transitions. [2021-12-17 18:58:42,272 INFO L78 Accepts]: Start accepts. Automaton has 96089 states and 142864 transitions. Word has length 166 [2021-12-17 18:58:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:42,272 INFO L470 AbstractCegarLoop]: Abstraction has 96089 states and 142864 transitions. [2021-12-17 18:58:42,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 18:58:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 96089 states and 142864 transitions. [2021-12-17 18:58:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 18:58:42,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:42,529 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:42,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 18:58:42,749 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 [2021-12-17 18:58:42,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:42,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:42,750 INFO L85 PathProgramCache]: Analyzing trace with hash 399987983, now seen corresponding path program 1 times [2021-12-17 18:58:42,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:42,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115203291] [2021-12-17 18:58:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:42,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 18:58:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:58:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:58:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 18:58:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:58:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 18:58:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 18:58:42,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:42,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115203291] [2021-12-17 18:58:42,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115203291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:58:42,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194017220] [2021-12-17 18:58:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:42,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:58:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:58:42,835 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) [2021-12-17 18:58:42,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 18:58:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:58:42,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:58:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 18:58:43,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:58:43,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194017220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:43,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:58:43,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:58:43,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125198609] [2021-12-17 18:58:43,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:43,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:58:43,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:43,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:58:43,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:43,215 INFO L87 Difference]: Start difference. First operand 96089 states and 142864 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 18:58:46,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:58:46,922 INFO L93 Difference]: Finished difference Result 202199 states and 303485 transitions. [2021-12-17 18:58:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:58:46,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2021-12-17 18:58:46,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:58:47,402 INFO L225 Difference]: With dead ends: 202199 [2021-12-17 18:58:47,403 INFO L226 Difference]: Without dead ends: 108251 [2021-12-17 18:58:47,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:47,776 INFO L933 BasicCegarLoop]: 4178 mSDtfsCounter, 4108 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4108 SdHoareTripleChecker+Valid, 4222 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:58:47,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4108 Valid, 4222 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:58:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-12-17 18:58:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 108251. [2021-12-17 18:58:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108251 states, 94154 states have (on average 1.4208105869108056) internal successors, (133775), 95061 states have internal predecessors, (133775), 7923 states have call successors, (7923), 5404 states have call predecessors, (7923), 6172 states have return successors, (14574), 7849 states have call predecessors, (14574), 7923 states have call successors, (14574) [2021-12-17 18:58:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108251 states to 108251 states and 156272 transitions. [2021-12-17 18:58:52,081 INFO L78 Accepts]: Start accepts. Automaton has 108251 states and 156272 transitions. Word has length 184 [2021-12-17 18:58:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:58:52,081 INFO L470 AbstractCegarLoop]: Abstraction has 108251 states and 156272 transitions. [2021-12-17 18:58:52,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 18:58:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 108251 states and 156272 transitions. [2021-12-17 18:58:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 18:58:52,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:58:52,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:58:52,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 18:58:52,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 18:58:52,512 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:58:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:58:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1248051052, now seen corresponding path program 1 times [2021-12-17 18:58:52,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:58:52,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905705512] [2021-12-17 18:58:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:52,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:58:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:58:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:58:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:58:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:58:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:58:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 18:58:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:58:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:58:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 18:58:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:58:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 18:58:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 18:58:52,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:58:52,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905705512] [2021-12-17 18:58:52,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905705512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:58:52,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717964697] [2021-12-17 18:58:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:58:52,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:58:52,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:58:52,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:58:52,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 18:58:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:58:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:58:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:58:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 18:58:52,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:58:52,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717964697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:58:52,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:58:52,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:58:52,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497442523] [2021-12-17 18:58:52,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:58:52,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:58:52,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:58:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:58:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:58:52,977 INFO L87 Difference]: Start difference. First operand 108251 states and 156272 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)