./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label47+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_label47+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 6efc92bef151ce13307933930fbf12d828dd2fc0ecd03ad5da23928a5efb5fb2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 19:02:56,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 19:02:56,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 19:02:56,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 19:02:56,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 19:02:56,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 19:02:56,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 19:02:56,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 19:02:56,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 19:02:56,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 19:02:56,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 19:02:56,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 19:02:56,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 19:02:56,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 19:02:56,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 19:02:56,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 19:02:56,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 19:02:56,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 19:02:56,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 19:02:56,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 19:02:56,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 19:02:56,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 19:02:56,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 19:02:56,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 19:02:56,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 19:02:56,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 19:02:56,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 19:02:56,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 19:02:56,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 19:02:56,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 19:02:56,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 19:02:56,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 19:02:56,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 19:02:56,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 19:02:56,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 19:02:56,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 19:02:56,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 19:02:56,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 19:02:56,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 19:02:56,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 19:02:56,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 19:02:56,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 19:02:56,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 19:02:56,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 19:02:56,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 19:02:56,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 19:02:56,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 19:02:56,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 19:02:56,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 19:02:56,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 19:02:56,928 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 19:02:56,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 19:02:56,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 19:02:56,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 19:02:56,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 19:02:56,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 19:02:56,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 19:02:56,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 19:02:56,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 19:02:56,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 19:02:56,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 19:02:56,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 19:02:56,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 19:02:56,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 19:02:56,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 19:02:56,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 19:02:56,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:02:56,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 19:02:56,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 19:02:56,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 19:02:56,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 19:02:56,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 19:02:56,934 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 19:02:56,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 19:02:56,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 19:02:56,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 19:02:56,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6efc92bef151ce13307933930fbf12d828dd2fc0ecd03ad5da23928a5efb5fb2 [2021-12-17 19:02:57,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 19:02:57,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 19:02:57,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 19:02:57,187 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 19:02:57,188 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 19:02:57,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label47+token_ring.03.cil-2.c [2021-12-17 19:02:57,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e83e859c/d02f2600798b4d2e863d1ad45ac65295/FLAG86594ca33 [2021-12-17 19:02:58,009 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 19:02:58,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.03.cil-2.c [2021-12-17 19:02:58,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e83e859c/d02f2600798b4d2e863d1ad45ac65295/FLAG86594ca33 [2021-12-17 19:02:58,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e83e859c/d02f2600798b4d2e863d1ad45ac65295 [2021-12-17 19:02:58,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 19:02:58,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 19:02:58,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 19:02:58,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 19:02:58,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 19:02:58,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:02:58" (1/1) ... [2021-12-17 19:02:58,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c85ed1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:02:58, skipping insertion in model container [2021-12-17 19:02:58,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:02:58" (1/1) ... [2021-12-17 19:02:58,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 19:02:58,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 19:02:59,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.03.cil-2.c[377612,377625] [2021-12-17 19:02:59,919 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.03.cil-2.c[383339,383352] [2021-12-17 19:03:00,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:03:00,081 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 19:03:00,785 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_label47+token_ring.03.cil-2.c[377612,377625] [2021-12-17 19:03:00,794 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label47+token_ring.03.cil-2.c[383339,383352] [2021-12-17 19:03:00,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:03:00,911 INFO L208 MainTranslator]: Completed translation [2021-12-17 19:03:00,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00 WrapperNode [2021-12-17 19:03:00,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 19:03:00,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 19:03:00,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 19:03:00,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 19:03:00,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,478 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-12-17 19:03:01,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 19:03:01,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 19:03:01,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 19:03:01,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 19:03:01,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 19:03:01,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 19:03:01,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 19:03:01,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 19:03:01,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (1/1) ... [2021-12-17 19:03:01,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:03:01,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:03:01,933 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 19:03:02,000 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 19:03:02,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 19:03:02,029 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 19:03:02,029 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 19:03:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 19:03:02,030 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 19:03:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 19:03:02,030 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 19:03:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 19:03:02,030 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 19:03:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 19:03:02,030 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 19:03:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 19:03:02,030 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 19:03:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 19:03:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 19:03:02,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 19:03:02,168 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 19:03:02,169 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 19:03:07,955 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 19:03:07,987 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 19:03:07,988 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-17 19:03:07,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:03:07 BoogieIcfgContainer [2021-12-17 19:03:07,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 19:03:07,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 19:03:07,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 19:03:08,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 19:03:08,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:02:58" (1/3) ... [2021-12-17 19:03:08,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c014f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:03:08, skipping insertion in model container [2021-12-17 19:03:08,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:03:00" (2/3) ... [2021-12-17 19:03:08,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c014f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:03:08, skipping insertion in model container [2021-12-17 19:03:08,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:03:07" (3/3) ... [2021-12-17 19:03:08,003 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.03.cil-2.c [2021-12-17 19:03:08,007 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 19:03:08,007 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 19:03:08,068 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 19:03:08,074 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 19:03:08,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 19:03:08,132 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 19:03:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 19:03:08,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:08,146 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 19:03:08,147 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:08,152 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-12-17 19:03:08,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:08,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983255005] [2021-12-17 19:03:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:08,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:08,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:08,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:08,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:08,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:08,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:08,496 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 19:03:08,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:08,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983255005] [2021-12-17 19:03:08,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983255005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:08,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:03:08,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:03:08,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464487952] [2021-12-17 19:03:08,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:08,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:03:08,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:08,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:03:08,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:03:08,536 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 19:03:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:09,687 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-12-17 19:03:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:03:09,689 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 19:03:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:09,717 INFO L225 Difference]: With dead ends: 4899 [2021-12-17 19:03:09,717 INFO L226 Difference]: Without dead ends: 2500 [2021-12-17 19:03:09,727 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 19:03:09,730 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 19:03:09,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 19:03:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-17 19:03:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-12-17 19:03:09,853 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 19:03:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-12-17 19:03:09,864 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-12-17 19:03:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:09,865 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-12-17 19:03:09,865 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 19:03:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-12-17 19:03:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 19:03:09,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:09,877 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 19:03:09,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 19:03:09,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:09,880 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-12-17 19:03:09,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:09,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425053719] [2021-12-17 19:03:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:09,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:09,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:09,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:09,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:10,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:10,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:10,067 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 19:03:10,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:10,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425053719] [2021-12-17 19:03:10,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425053719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:10,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:03:10,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:03:10,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939696730] [2021-12-17 19:03:10,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:10,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:03:10,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:10,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:03:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:03:10,071 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 19:03:11,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:11,211 INFO L93 Difference]: Finished difference Result 2969 states and 5244 transitions. [2021-12-17 19:03:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:03:11,212 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 19:03:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:11,223 INFO L225 Difference]: With dead ends: 2969 [2021-12-17 19:03:11,223 INFO L226 Difference]: Without dead ends: 2686 [2021-12-17 19:03:11,225 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 19:03:11,226 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 4469 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20915 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 19:03:11,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20915 Invalid, 1107 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 19:03:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-12-17 19:03:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2548. [2021-12-17 19:03:11,278 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 19:03:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4593 transitions. [2021-12-17 19:03:11,286 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4593 transitions. Word has length 79 [2021-12-17 19:03:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:11,287 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4593 transitions. [2021-12-17 19:03:11,287 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 19:03:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4593 transitions. [2021-12-17 19:03:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 19:03:11,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:11,289 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 19:03:11,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 19:03:11,289 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-12-17 19:03:11,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:11,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861909851] [2021-12-17 19:03:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:11,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:11,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:11,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:11,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:11,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:11,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:11,388 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 19:03:11,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:11,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861909851] [2021-12-17 19:03:11,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861909851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:11,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:03:11,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:03:11,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769806564] [2021-12-17 19:03:11,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:11,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:03:11,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:03:11,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:03:11,394 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 19:03:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:12,418 INFO L93 Difference]: Finished difference Result 3451 states and 5967 transitions. [2021-12-17 19:03:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:03:12,419 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 19:03:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:12,432 INFO L225 Difference]: With dead ends: 3451 [2021-12-17 19:03:12,432 INFO L226 Difference]: Without dead ends: 3035 [2021-12-17 19:03:12,434 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 19:03:12,435 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 19:03:12,436 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 19:03:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-12-17 19:03:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2815. [2021-12-17 19:03:12,497 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 19:03:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 4988 transitions. [2021-12-17 19:03:12,508 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 4988 transitions. Word has length 79 [2021-12-17 19:03:12,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:12,509 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 4988 transitions. [2021-12-17 19:03:12,509 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 19:03:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 4988 transitions. [2021-12-17 19:03:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 19:03:12,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:12,511 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 19:03:12,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 19:03:12,511 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:12,512 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-12-17 19:03:12,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:12,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666284701] [2021-12-17 19:03:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:12,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:12,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:12,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:12,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:12,594 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 19:03:12,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:12,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666284701] [2021-12-17 19:03:12,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666284701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:12,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:03:12,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:03:12,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779139791] [2021-12-17 19:03:12,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:12,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:03:12,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:12,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:03:12,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:03:12,597 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 19:03:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:13,638 INFO L93 Difference]: Finished difference Result 4382 states and 7362 transitions. [2021-12-17 19:03:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:03:13,639 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 19:03:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:13,654 INFO L225 Difference]: With dead ends: 4382 [2021-12-17 19:03:13,655 INFO L226 Difference]: Without dead ends: 3699 [2021-12-17 19:03:13,659 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 19:03:13,660 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, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 19:03:13,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4472 Valid, 20899 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 19:03:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-12-17 19:03:13,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3350. [2021-12-17 19:03:13,824 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 19:03:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5784 transitions. [2021-12-17 19:03:13,841 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5784 transitions. Word has length 79 [2021-12-17 19:03:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:13,841 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5784 transitions. [2021-12-17 19:03:13,841 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 19:03:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5784 transitions. [2021-12-17 19:03:13,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 19:03:13,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:13,844 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 19:03:13,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 19:03:13,844 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-12-17 19:03:13,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:13,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195388091] [2021-12-17 19:03:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:13,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:13,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:13,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:13,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:13,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:13,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:13,928 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 19:03:13,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:13,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195388091] [2021-12-17 19:03:13,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195388091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:13,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:03:13,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:03:13,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695462094] [2021-12-17 19:03:13,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:13,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:03:13,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:03:13,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:03:13,931 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 19:03:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:14,458 INFO L93 Difference]: Finished difference Result 4914 states and 8177 transitions. [2021-12-17 19:03:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:03:14,459 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 19:03:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:14,473 INFO L225 Difference]: With dead ends: 4914 [2021-12-17 19:03:14,474 INFO L226 Difference]: Without dead ends: 3696 [2021-12-17 19:03:14,477 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 19:03:14,478 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4396 mSDsluCounter, 12153 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 19:03:14,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4407 Valid, 16322 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 19:03:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-12-17 19:03:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3350. [2021-12-17 19:03:14,578 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 19:03:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5775 transitions. [2021-12-17 19:03:14,588 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5775 transitions. Word has length 79 [2021-12-17 19:03:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:14,590 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5775 transitions. [2021-12-17 19:03:14,590 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 19:03:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5775 transitions. [2021-12-17 19:03:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 19:03:14,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:14,596 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 19:03:14,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 19:03:14,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-12-17 19:03:14,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:14,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881481620] [2021-12-17 19:03:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:14,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:14,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:14,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:14,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:14,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:14,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:14,698 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 19:03:14,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:14,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881481620] [2021-12-17 19:03:14,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881481620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:14,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:03:14,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:03:14,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001371980] [2021-12-17 19:03:14,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:14,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:03:14,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:03:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:03:14,701 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 19:03:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:15,795 INFO L93 Difference]: Finished difference Result 6544 states and 10562 transitions. [2021-12-17 19:03:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:03:15,796 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 19:03:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:15,823 INFO L225 Difference]: With dead ends: 6544 [2021-12-17 19:03:15,824 INFO L226 Difference]: Without dead ends: 5326 [2021-12-17 19:03:15,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 19:03:15,832 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 4475 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 19:03:15,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4484 Valid, 20917 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 19:03:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-12-17 19:03:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4369. [2021-12-17 19:03:15,980 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 19:03:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 7296 transitions. [2021-12-17 19:03:15,992 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 7296 transitions. Word has length 79 [2021-12-17 19:03:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:15,992 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 7296 transitions. [2021-12-17 19:03:15,993 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 19:03:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 7296 transitions. [2021-12-17 19:03:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 19:03:15,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:15,996 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 19:03:15,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 19:03:15,996 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-12-17 19:03:15,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556969902] [2021-12-17 19:03:15,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:15,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:16,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:16,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:16,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:16,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:16,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:16,095 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 19:03:16,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:16,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556969902] [2021-12-17 19:03:16,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556969902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:16,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:03:16,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:03:16,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288538835] [2021-12-17 19:03:16,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:16,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:03:16,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:03:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:03:16,099 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 19:03:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:17,212 INFO L93 Difference]: Finished difference Result 9937 states and 15669 transitions. [2021-12-17 19:03:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:03:17,214 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 19:03:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:17,251 INFO L225 Difference]: With dead ends: 9937 [2021-12-17 19:03:17,251 INFO L226 Difference]: Without dead ends: 7700 [2021-12-17 19:03:17,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 19:03:17,262 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4466 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:03:17,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4480 Valid, 20870 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 19:03:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7700 states. [2021-12-17 19:03:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7700 to 6452. [2021-12-17 19:03:17,493 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 19:03:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 10474 transitions. [2021-12-17 19:03:17,510 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 10474 transitions. Word has length 79 [2021-12-17 19:03:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:17,510 INFO L470 AbstractCegarLoop]: Abstraction has 6452 states and 10474 transitions. [2021-12-17 19:03:17,511 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 19:03:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 10474 transitions. [2021-12-17 19:03:17,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 19:03:17,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:17,515 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 19:03:17,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 19:03:17,516 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:17,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-12-17 19:03:17,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:17,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106494609] [2021-12-17 19:03:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:17,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:17,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:17,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:17,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:17,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:17,582 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 19:03:17,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:17,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106494609] [2021-12-17 19:03:17,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106494609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:17,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:03:17,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:03:17,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641597675] [2021-12-17 19:03:17,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:17,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:03:17,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:03:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:03:17,584 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 19:03:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:18,652 INFO L93 Difference]: Finished difference Result 14451 states and 22576 transitions. [2021-12-17 19:03:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:03:18,653 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 19:03:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:18,686 INFO L225 Difference]: With dead ends: 14451 [2021-12-17 19:03:18,687 INFO L226 Difference]: Without dead ends: 10132 [2021-12-17 19:03:18,704 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 19:03:18,705 INFO L933 BasicCegarLoop]: 4386 mSDtfsCounter, 4626 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:03:18,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4653 Valid, 16731 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 19:03:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10132 states. [2021-12-17 19:03:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10132 to 8642. [2021-12-17 19:03:19,065 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 19:03:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 13640 transitions. [2021-12-17 19:03:19,089 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 13640 transitions. Word has length 79 [2021-12-17 19:03:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:19,089 INFO L470 AbstractCegarLoop]: Abstraction has 8642 states and 13640 transitions. [2021-12-17 19:03:19,090 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 19:03:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 13640 transitions. [2021-12-17 19:03:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 19:03:19,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:19,106 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 19:03:19,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 19:03:19,107 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-12-17 19:03:19,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058272585] [2021-12-17 19:03:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:19,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 19:03:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:03:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 19:03:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,253 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 19:03:19,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:19,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058272585] [2021-12-17 19:03:19,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058272585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:03:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81484256] [2021-12-17 19:03:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:19,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:03:19,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:03:19,256 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 19:03:19,257 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 19:03:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:19,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:03:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:03:19,600 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 19:03:19,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:03:19,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81484256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:19,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:03:19,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:03:19,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136667754] [2021-12-17 19:03:19,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:19,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:03:19,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:19,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:03:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:03:19,602 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 19:03:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:20,032 INFO L93 Difference]: Finished difference Result 21481 states and 32916 transitions. [2021-12-17 19:03:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:03:20,032 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 19:03:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:20,094 INFO L225 Difference]: With dead ends: 21481 [2021-12-17 19:03:20,094 INFO L226 Difference]: Without dead ends: 14972 [2021-12-17 19:03:20,122 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 19:03:20,123 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 19:03:20,123 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 19:03:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14972 states. [2021-12-17 19:03:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14972 to 14870. [2021-12-17 19:03:20,752 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 19:03:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14870 states to 14870 states and 22815 transitions. [2021-12-17 19:03:20,795 INFO L78 Accepts]: Start accepts. Automaton has 14870 states and 22815 transitions. Word has length 128 [2021-12-17 19:03:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:20,795 INFO L470 AbstractCegarLoop]: Abstraction has 14870 states and 22815 transitions. [2021-12-17 19:03:20,795 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 19:03:20,796 INFO L276 IsEmpty]: Start isEmpty. Operand 14870 states and 22815 transitions. [2021-12-17 19:03:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 19:03:20,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:20,820 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 19:03:20,847 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 19:03:21,035 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 19:03:21,036 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:21,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-12-17 19:03:21,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:21,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478987797] [2021-12-17 19:03:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:21,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 19:03:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:03:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 19:03:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,156 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 19:03:21,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:21,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478987797] [2021-12-17 19:03:21,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478987797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:03:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141744104] [2021-12-17 19:03:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:21,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:03:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:03:21,159 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 19:03:21,160 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 19:03:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:21,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:03:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:03:21,524 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 19:03:21,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:03:21,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141744104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:21,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:03:21,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:03:21,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002761248] [2021-12-17 19:03:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:21,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:03:21,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:03:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:03:21,527 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 19:03:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:22,258 INFO L93 Difference]: Finished difference Result 39843 states and 60157 transitions. [2021-12-17 19:03:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:03:22,259 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 19:03:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:22,375 INFO L225 Difference]: With dead ends: 39843 [2021-12-17 19:03:22,376 INFO L226 Difference]: Without dead ends: 27106 [2021-12-17 19:03:22,424 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 19:03:22,425 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 19:03:22,425 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 19:03:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27106 states. [2021-12-17 19:03:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27106 to 26904. [2021-12-17 19:03:23,311 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 19:03:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 40519 transitions. [2021-12-17 19:03:23,392 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 40519 transitions. Word has length 128 [2021-12-17 19:03:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:23,392 INFO L470 AbstractCegarLoop]: Abstraction has 26904 states and 40519 transitions. [2021-12-17 19:03:23,392 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 19:03:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 40519 transitions. [2021-12-17 19:03:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 19:03:23,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:23,434 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 19:03:23,459 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 19:03:23,647 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 19:03:23,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:23,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:23,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-12-17 19:03:23,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:23,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205441314] [2021-12-17 19:03:23,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:23,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 19:03:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:03:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 19:03:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,755 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 19:03:23,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205441314] [2021-12-17 19:03:23,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205441314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:03:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391626749] [2021-12-17 19:03:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:23,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:03:23,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:03:23,757 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 19:03:23,758 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 19:03:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:23,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:03:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:03:24,039 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 19:03:24,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:03:24,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391626749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:24,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:03:24,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:03:24,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813559541] [2021-12-17 19:03:24,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:24,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:03:24,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:03:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:03:24,043 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 19:03:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:25,212 INFO L93 Difference]: Finished difference Result 75433 states and 113453 transitions. [2021-12-17 19:03:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:03:25,213 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 19:03:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:25,476 INFO L225 Difference]: With dead ends: 75433 [2021-12-17 19:03:25,476 INFO L226 Difference]: Without dead ends: 50663 [2021-12-17 19:03:25,558 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 19:03:25,558 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 19:03:25,559 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 19:03:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50663 states. [2021-12-17 19:03:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50663 to 50663. [2021-12-17 19:03:27,749 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 19:03:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50663 states to 50663 states and 75944 transitions. [2021-12-17 19:03:27,921 INFO L78 Accepts]: Start accepts. Automaton has 50663 states and 75944 transitions. Word has length 128 [2021-12-17 19:03:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:27,923 INFO L470 AbstractCegarLoop]: Abstraction has 50663 states and 75944 transitions. [2021-12-17 19:03:27,923 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 19:03:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 50663 states and 75944 transitions. [2021-12-17 19:03:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 19:03:28,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:28,051 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 19:03:28,079 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 19:03:28,271 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 19:03:28,272 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:28,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-12-17 19:03:28,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:28,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496413403] [2021-12-17 19:03:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:28,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 19:03:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:03:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 19:03:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:03:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 19:03:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,398 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 19:03:28,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:28,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496413403] [2021-12-17 19:03:28,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496413403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:03:28,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127059786] [2021-12-17 19:03:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:28,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:03:28,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:03:28,400 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 19:03:28,402 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 19:03:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:28,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:03:28,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:03:28,830 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 19:03:28,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:03:28,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127059786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:28,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:03:28,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:03:28,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724894886] [2021-12-17 19:03:28,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:28,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:03:28,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:28,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:03:28,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:03:28,835 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 19:03:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:31,578 INFO L93 Difference]: Finished difference Result 145415 states and 218067 transitions. [2021-12-17 19:03:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:03:31,581 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 19:03:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:32,020 INFO L225 Difference]: With dead ends: 145415 [2021-12-17 19:03:32,020 INFO L226 Difference]: Without dead ends: 96891 [2021-12-17 19:03:32,148 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 19:03:32,148 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 19:03:32,148 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 19:03:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96891 states. [2021-12-17 19:03:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96891 to 96089. [2021-12-17 19:03:35,668 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 19:03:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96089 states to 96089 states and 142864 transitions. [2021-12-17 19:03:35,948 INFO L78 Accepts]: Start accepts. Automaton has 96089 states and 142864 transitions. Word has length 166 [2021-12-17 19:03:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:35,948 INFO L470 AbstractCegarLoop]: Abstraction has 96089 states and 142864 transitions. [2021-12-17 19:03:35,948 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 19:03:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 96089 states and 142864 transitions. [2021-12-17 19:03:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 19:03:36,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:36,433 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 19:03:36,456 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 19:03:36,656 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 19:03:36,656 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:36,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash 399987983, now seen corresponding path program 1 times [2021-12-17 19:03:36,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:36,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068479406] [2021-12-17 19:03:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:36,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 19:03:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 19:03:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:03:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 19:03:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:03:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 19:03:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,794 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 19:03:36,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:36,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068479406] [2021-12-17 19:03:36,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068479406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:03:36,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37751657] [2021-12-17 19:03:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:36,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:03:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:03:36,796 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 19:03:36,797 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 19:03:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:36,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:03:36,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:03:37,219 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 19:03:37,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:03:37,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37751657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:37,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:03:37,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:03:37,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758590573] [2021-12-17 19:03:37,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:37,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:03:37,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:03:37,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:03:37,221 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 19:03:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:40,689 INFO L93 Difference]: Finished difference Result 202199 states and 303485 transitions. [2021-12-17 19:03:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:03:40,690 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 19:03:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:41,321 INFO L225 Difference]: With dead ends: 202199 [2021-12-17 19:03:41,322 INFO L226 Difference]: Without dead ends: 108251 [2021-12-17 19:03:41,515 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 19:03:41,516 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 19:03:41,516 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 19:03:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-12-17 19:03:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 108251. [2021-12-17 19:03:45,308 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 19:03:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108251 states to 108251 states and 156272 transitions. [2021-12-17 19:03:45,847 INFO L78 Accepts]: Start accepts. Automaton has 108251 states and 156272 transitions. Word has length 184 [2021-12-17 19:03:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:03:45,848 INFO L470 AbstractCegarLoop]: Abstraction has 108251 states and 156272 transitions. [2021-12-17 19:03:45,848 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 19:03:45,848 INFO L276 IsEmpty]: Start isEmpty. Operand 108251 states and 156272 transitions. [2021-12-17 19:03:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 19:03:46,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:03:46,050 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 19:03:46,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 19:03:46,251 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 19:03:46,251 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:03:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:03:46,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1248051052, now seen corresponding path program 1 times [2021-12-17 19:03:46,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:03:46,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116361564] [2021-12-17 19:03:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:46,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:03:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:03:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:03:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:03:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:03:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:03:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 19:03:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 19:03:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:03:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 19:03:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:03:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 19:03:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,384 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 19:03:46,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:03:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116361564] [2021-12-17 19:03:46,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116361564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:03:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383306852] [2021-12-17 19:03:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:03:46,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:03:46,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:03:46,386 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 19:03:46,387 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 19:03:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:03:46,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 19:03:46,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:03:46,771 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 19:03:46,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:03:46,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383306852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:03:46,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:03:46,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:03:46,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218418888] [2021-12-17 19:03:46,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:03:46,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:03:46,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:03:46,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:03:46,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:03:46,773 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) [2021-12-17 19:03:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:03:50,488 INFO L93 Difference]: Finished difference Result 187531 states and 268805 transitions. [2021-12-17 19:03:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:03:50,489 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 184 [2021-12-17 19:03:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:03:50,895 INFO L225 Difference]: With dead ends: 187531 [2021-12-17 19:03:50,895 INFO L226 Difference]: Without dead ends: 115519 [2021-12-17 19:03:51,239 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 19:03:51,240 INFO L933 BasicCegarLoop]: 4201 mSDtfsCounter, 4120 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4120 SdHoareTripleChecker+Valid, 4408 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:03:51,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4120 Valid, 4408 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:03:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115519 states.