./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.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 00613173bfd5be4a2d23c5cbdde33ad3a2bf8c778a3dcd5e833889c0a53ce55c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:55:42,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:55:42,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:55:42,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:55:42,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:55:42,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:55:42,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:55:42,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:55:42,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:55:42,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:55:42,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:55:42,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:55:42,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:55:42,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:55:42,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:55:42,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:55:42,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:55:42,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:55:42,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:55:42,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:55:42,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:55:42,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:55:42,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:55:42,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:55:42,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:55:42,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:55:42,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:55:42,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:55:42,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:55:42,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:55:42,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:55:42,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:55:42,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:55:42,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:55:42,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:55:42,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:55:42,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:55:42,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:55:42,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:55:42,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:55:42,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:55:42,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:55:42,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:55:42,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:55:42,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:55:42,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:55:42,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:55:42,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:55:42,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:55:42,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:55:42,943 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:55:42,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:55:42,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:55:42,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:55:42,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:55:42,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:55:42,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:55:42,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:55:42,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:55:42,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:55:42,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:55:42,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:55:42,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:55:42,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:55:42,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:55:42,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:55:42,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:55:42,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:55:42,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:55:42,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:55:42,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:55:42,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:55:42,952 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:55:42,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:55:42,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:55:42,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:55:42,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00613173bfd5be4a2d23c5cbdde33ad3a2bf8c778a3dcd5e833889c0a53ce55c [2021-12-22 12:55:43,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:55:43,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:55:43,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:55:43,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:55:43,166 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:55:43,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-22 12:55:43,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67bee72f3/11b74a1c795b48c2989cd5c459af82a0/FLAG493a48189 [2021-12-22 12:55:43,754 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:55:43,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-22 12:55:43,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67bee72f3/11b74a1c795b48c2989cd5c459af82a0/FLAG493a48189 [2021-12-22 12:55:43,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67bee72f3/11b74a1c795b48c2989cd5c459af82a0 [2021-12-22 12:55:43,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:55:43,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:55:43,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:55:43,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:55:43,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:55:43,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:55:43" (1/1) ... [2021-12-22 12:55:43,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3d0e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:43, skipping insertion in model container [2021-12-22 12:55:43,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:55:43" (1/1) ... [2021-12-22 12:55:43,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:55:44,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:55:44,367 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/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c[6450,6463] [2021-12-22 12:55:44,426 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/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c[14198,14211] [2021-12-22 12:55:44,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:55:44,880 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:55:44,906 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/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c[6450,6463] [2021-12-22 12:55:44,918 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/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c[14198,14211] [2021-12-22 12:55:45,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:55:45,271 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:55:45,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45 WrapperNode [2021-12-22 12:55:45,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:55:45,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:55:45,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:55:45,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:55:45,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,637 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4976 [2021-12-22 12:55:45,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:55:45,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:55:45,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:55:45,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:55:45,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:55:45,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:55:45,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:55:45,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:55:45,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (1/1) ... [2021-12-22 12:55:45,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:55:46,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:55:46,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 12:55:46,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 12:55:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:55:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:55:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:55:46,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:55:46,137 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:55:46,138 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:55:48,808 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:55:48,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:55:48,819 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 12:55:48,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:55:48 BoogieIcfgContainer [2021-12-22 12:55:48,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:55:48,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:55:48,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:55:48,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:55:48,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:55:43" (1/3) ... [2021-12-22 12:55:48,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b0f837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:55:48, skipping insertion in model container [2021-12-22 12:55:48,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:55:45" (2/3) ... [2021-12-22 12:55:48,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b0f837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:55:48, skipping insertion in model container [2021-12-22 12:55:48,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:55:48" (3/3) ... [2021-12-22 12:55:48,831 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-22 12:55:48,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:55:48,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:55:48,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:55:48,871 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 12:55:48,871 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:55:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 12:55:48,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:48,896 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] [2021-12-22 12:55:48,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1601385972, now seen corresponding path program 1 times [2021-12-22 12:55:48,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:48,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174584723] [2021-12-22 12:55:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:48,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:49,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:49,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174584723] [2021-12-22 12:55:49,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174584723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:49,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:49,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 12:55:49,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708903890] [2021-12-22 12:55:49,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 12:55:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:49,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 12:55:49,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 12:55:49,078 INFO L87 Difference]: Start difference. First operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:49,155 INFO L93 Difference]: Finished difference Result 1736 states and 3296 transitions. [2021-12-22 12:55:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 12:55:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 12:55:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:49,168 INFO L225 Difference]: With dead ends: 1736 [2021-12-22 12:55:49,169 INFO L226 Difference]: Without dead ends: 814 [2021-12-22 12:55:49,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 12:55:49,176 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:49,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-22 12:55:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-22 12:55:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8916256157635467) internal successors, (1536), 813 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1536 transitions. [2021-12-22 12:55:49,240 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1536 transitions. Word has length 26 [2021-12-22 12:55:49,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:49,240 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1536 transitions. [2021-12-22 12:55:49,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1536 transitions. [2021-12-22 12:55:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 12:55:49,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:49,242 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] [2021-12-22 12:55:49,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:55:49,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2021-12-22 12:55:49,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:49,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257769850] [2021-12-22 12:55:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:49,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:49,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:49,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257769850] [2021-12-22 12:55:49,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257769850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:49,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:49,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:55:49,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855445651] [2021-12-22 12:55:49,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:49,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:55:49,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:49,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:55:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:55:49,338 INFO L87 Difference]: Start difference. First operand 814 states and 1536 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:49,409 INFO L93 Difference]: Finished difference Result 856 states and 1599 transitions. [2021-12-22 12:55:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:55:49,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 12:55:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:49,413 INFO L225 Difference]: With dead ends: 856 [2021-12-22 12:55:49,413 INFO L226 Difference]: Without dead ends: 814 [2021-12-22 12:55:49,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:55:49,417 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 3 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:49,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6117 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-22 12:55:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-22 12:55:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8719211822660098) internal successors, (1520), 813 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1520 transitions. [2021-12-22 12:55:49,462 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1520 transitions. Word has length 26 [2021-12-22 12:55:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:49,462 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1520 transitions. [2021-12-22 12:55:49,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1520 transitions. [2021-12-22 12:55:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 12:55:49,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:49,463 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] [2021-12-22 12:55:49,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:55:49,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2021-12-22 12:55:49,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:49,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701484096] [2021-12-22 12:55:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:49,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:49,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:49,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701484096] [2021-12-22 12:55:49,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701484096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:49,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:49,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:55:49,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494082078] [2021-12-22 12:55:49,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:49,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:55:49,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:55:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:49,525 INFO L87 Difference]: Start difference. First operand 814 states and 1520 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:49,545 INFO L93 Difference]: Finished difference Result 884 states and 1628 transitions. [2021-12-22 12:55:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:55:49,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-22 12:55:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:49,548 INFO L225 Difference]: With dead ends: 884 [2021-12-22 12:55:49,549 INFO L226 Difference]: Without dead ends: 846 [2021-12-22 12:55:49,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:49,550 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:49,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1610 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-12-22 12:55:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 844. [2021-12-22 12:55:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.8610451306413303) internal successors, (1567), 843 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1567 transitions. [2021-12-22 12:55:49,564 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1567 transitions. Word has length 41 [2021-12-22 12:55:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:49,565 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1567 transitions. [2021-12-22 12:55:49,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1567 transitions. [2021-12-22 12:55:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 12:55:49,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:49,566 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] [2021-12-22 12:55:49,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:55:49,567 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:49,567 INFO L85 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2021-12-22 12:55:49,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:49,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771675186] [2021-12-22 12:55:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:49,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:49,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:49,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771675186] [2021-12-22 12:55:49,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771675186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:49,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:49,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:55:49,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693470564] [2021-12-22 12:55:49,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:49,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:55:49,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:55:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:49,610 INFO L87 Difference]: Start difference. First operand 844 states and 1567 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:49,639 INFO L93 Difference]: Finished difference Result 968 states and 1759 transitions. [2021-12-22 12:55:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:55:49,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-22 12:55:49,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:49,643 INFO L225 Difference]: With dead ends: 968 [2021-12-22 12:55:49,643 INFO L226 Difference]: Without dead ends: 900 [2021-12-22 12:55:49,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:49,644 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:49,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-12-22 12:55:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 898. [2021-12-22 12:55:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.8415178571428572) internal successors, (1650), 897 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1650 transitions. [2021-12-22 12:55:49,710 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1650 transitions. Word has length 41 [2021-12-22 12:55:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:49,710 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1650 transitions. [2021-12-22 12:55:49,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1650 transitions. [2021-12-22 12:55:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 12:55:49,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:49,713 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] [2021-12-22 12:55:49,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:55:49,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2021-12-22 12:55:49,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:49,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052146642] [2021-12-22 12:55:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:49,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:49,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:49,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052146642] [2021-12-22 12:55:49,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052146642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:49,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:49,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:55:49,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469251759] [2021-12-22 12:55:49,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:49,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:55:49,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:49,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:55:49,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:55:49,760 INFO L87 Difference]: Start difference. First operand 898 states and 1650 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:49,857 INFO L93 Difference]: Finished difference Result 1630 states and 2784 transitions. [2021-12-22 12:55:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 12:55:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-22 12:55:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:49,863 INFO L225 Difference]: With dead ends: 1630 [2021-12-22 12:55:49,863 INFO L226 Difference]: Without dead ends: 1508 [2021-12-22 12:55:49,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:55:49,864 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 4693 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:49,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 1934 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:49,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-12-22 12:55:49,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1018. [2021-12-22 12:55:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1016 states have (on average 1.8011811023622046) internal successors, (1830), 1017 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1830 transitions. [2021-12-22 12:55:49,893 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1830 transitions. Word has length 41 [2021-12-22 12:55:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:49,893 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1830 transitions. [2021-12-22 12:55:49,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1830 transitions. [2021-12-22 12:55:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 12:55:49,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:49,895 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] [2021-12-22 12:55:49,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:55:49,895 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:49,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2021-12-22 12:55:49,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:49,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432749470] [2021-12-22 12:55:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:49,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:49,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432749470] [2021-12-22 12:55:49,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432749470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:49,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:49,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:55:49,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685473070] [2021-12-22 12:55:49,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:49,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:55:49,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:49,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:55:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:49,934 INFO L87 Difference]: Start difference. First operand 1018 states and 1830 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:49,973 INFO L93 Difference]: Finished difference Result 1458 states and 2492 transitions. [2021-12-22 12:55:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:55:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-22 12:55:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:49,978 INFO L225 Difference]: With dead ends: 1458 [2021-12-22 12:55:49,978 INFO L226 Difference]: Without dead ends: 1216 [2021-12-22 12:55:49,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:49,979 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:49,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1569 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:49,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-22 12:55:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1206. [2021-12-22 12:55:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.739202657807309) internal successors, (2094), 1205 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2094 transitions. [2021-12-22 12:55:50,012 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2094 transitions. Word has length 43 [2021-12-22 12:55:50,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:50,013 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2094 transitions. [2021-12-22 12:55:50,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2094 transitions. [2021-12-22 12:55:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 12:55:50,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:50,014 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] [2021-12-22 12:55:50,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:55:50,014 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:50,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2021-12-22 12:55:50,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:50,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905072955] [2021-12-22 12:55:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:50,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:50,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:50,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905072955] [2021-12-22 12:55:50,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905072955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:50,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:50,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:55:50,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842352438] [2021-12-22 12:55:50,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:50,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:55:50,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:55:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:55:50,152 INFO L87 Difference]: Start difference. First operand 1206 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:50,283 INFO L93 Difference]: Finished difference Result 1638 states and 2728 transitions. [2021-12-22 12:55:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:55:50,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-22 12:55:50,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:50,287 INFO L225 Difference]: With dead ends: 1638 [2021-12-22 12:55:50,288 INFO L226 Difference]: Without dead ends: 1208 [2021-12-22 12:55:50,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:55:50,296 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 1531 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:50,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1680 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-12-22 12:55:50,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1206. [2021-12-22 12:55:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.7325581395348837) internal successors, (2086), 1205 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2086 transitions. [2021-12-22 12:55:50,333 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2086 transitions. Word has length 43 [2021-12-22 12:55:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:50,335 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2086 transitions. [2021-12-22 12:55:50,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2086 transitions. [2021-12-22 12:55:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 12:55:50,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:50,336 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] [2021-12-22 12:55:50,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:55:50,337 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:50,338 INFO L85 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2021-12-22 12:55:50,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:50,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256092968] [2021-12-22 12:55:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:50,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:50,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:50,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256092968] [2021-12-22 12:55:50,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256092968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:50,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:50,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 12:55:50,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173794096] [2021-12-22 12:55:50,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:50,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 12:55:50,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:50,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 12:55:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:55:50,433 INFO L87 Difference]: Start difference. First operand 1206 states and 2086 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:50,574 INFO L93 Difference]: Finished difference Result 1540 states and 2558 transitions. [2021-12-22 12:55:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:55:50,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-22 12:55:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:50,579 INFO L225 Difference]: With dead ends: 1540 [2021-12-22 12:55:50,580 INFO L226 Difference]: Without dead ends: 1538 [2021-12-22 12:55:50,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-22 12:55:50,581 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 396 mSDsluCounter, 8921 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 10473 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:50,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 10473 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-22 12:55:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1230. [2021-12-22 12:55:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1228 states have (on average 1.714983713355049) internal successors, (2106), 1229 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2106 transitions. [2021-12-22 12:55:50,622 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2106 transitions. Word has length 44 [2021-12-22 12:55:50,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:50,623 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2106 transitions. [2021-12-22 12:55:50,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2106 transitions. [2021-12-22 12:55:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 12:55:50,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:50,624 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] [2021-12-22 12:55:50,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:55:50,624 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:50,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2021-12-22 12:55:50,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:50,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486190099] [2021-12-22 12:55:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:50,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:50,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:50,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486190099] [2021-12-22 12:55:50,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486190099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:50,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:50,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:55:50,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661306073] [2021-12-22 12:55:50,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:50,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:55:50,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:55:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:50,651 INFO L87 Difference]: Start difference. First operand 1230 states and 2106 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:50,695 INFO L93 Difference]: Finished difference Result 1701 states and 2784 transitions. [2021-12-22 12:55:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:55:50,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-22 12:55:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:50,700 INFO L225 Difference]: With dead ends: 1701 [2021-12-22 12:55:50,700 INFO L226 Difference]: Without dead ends: 1434 [2021-12-22 12:55:50,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:50,701 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1485 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:50,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1615 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-12-22 12:55:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1432. [2021-12-22 12:55:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1430 states have (on average 1.6671328671328671) internal successors, (2384), 1431 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2384 transitions. [2021-12-22 12:55:50,743 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2384 transitions. Word has length 45 [2021-12-22 12:55:50,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:50,743 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2384 transitions. [2021-12-22 12:55:50,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:50,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2384 transitions. [2021-12-22 12:55:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 12:55:50,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:50,745 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:55:50,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 12:55:50,745 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash -393288849, now seen corresponding path program 1 times [2021-12-22 12:55:50,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134857526] [2021-12-22 12:55:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:50,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 12:55:50,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:50,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134857526] [2021-12-22 12:55:50,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134857526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:50,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:50,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:55:50,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205662461] [2021-12-22 12:55:50,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:50,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:55:50,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:55:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:55:50,785 INFO L87 Difference]: Start difference. First operand 1432 states and 2384 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:51,099 INFO L93 Difference]: Finished difference Result 3536 states and 5336 transitions. [2021-12-22 12:55:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:55:51,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-22 12:55:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:51,120 INFO L225 Difference]: With dead ends: 3536 [2021-12-22 12:55:51,120 INFO L226 Difference]: Without dead ends: 2882 [2021-12-22 12:55:51,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:55:51,123 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3084 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3084 SdHoareTripleChecker+Valid, 3199 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:51,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3084 Valid, 3199 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:55:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-12-22 12:55:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2084. [2021-12-22 12:55:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2082 states have (on average 1.5811719500480308) internal successors, (3292), 2083 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3292 transitions. [2021-12-22 12:55:51,213 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3292 transitions. Word has length 64 [2021-12-22 12:55:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:51,214 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 3292 transitions. [2021-12-22 12:55:51,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3292 transitions. [2021-12-22 12:55:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 12:55:51,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:51,215 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:55:51,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 12:55:51,216 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895631, now seen corresponding path program 1 times [2021-12-22 12:55:51,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:51,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341393747] [2021-12-22 12:55:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:51,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 12:55:51,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:51,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341393747] [2021-12-22 12:55:51,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341393747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:51,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:51,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:55:51,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860592107] [2021-12-22 12:55:51,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:51,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:55:51,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:55:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:55:51,287 INFO L87 Difference]: Start difference. First operand 2084 states and 3292 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:51,451 INFO L93 Difference]: Finished difference Result 4188 states and 6244 transitions. [2021-12-22 12:55:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:55:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-22 12:55:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:51,460 INFO L225 Difference]: With dead ends: 4188 [2021-12-22 12:55:51,460 INFO L226 Difference]: Without dead ends: 3534 [2021-12-22 12:55:51,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:55:51,462 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3078 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 3217 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:51,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 3217 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3534 states. [2021-12-22 12:55:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3534 to 3064. [2021-12-22 12:55:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3062 states have (on average 1.5166557805355976) internal successors, (4644), 3063 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 4644 transitions. [2021-12-22 12:55:51,585 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 4644 transitions. Word has length 64 [2021-12-22 12:55:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:51,585 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 4644 transitions. [2021-12-22 12:55:51,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 4644 transitions. [2021-12-22 12:55:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 12:55:51,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:51,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:55:51,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 12:55:51,588 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1342668761, now seen corresponding path program 1 times [2021-12-22 12:55:51,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:51,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461909803] [2021-12-22 12:55:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:51,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:51,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:51,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461909803] [2021-12-22 12:55:51,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461909803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:51,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:51,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:55:51,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827557470] [2021-12-22 12:55:51,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:51,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:55:51,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:51,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:55:51,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:51,642 INFO L87 Difference]: Start difference. First operand 3064 states and 4644 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:51,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:51,727 INFO L93 Difference]: Finished difference Result 4714 states and 6968 transitions. [2021-12-22 12:55:51,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:55:51,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-22 12:55:51,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:51,734 INFO L225 Difference]: With dead ends: 4714 [2021-12-22 12:55:51,734 INFO L226 Difference]: Without dead ends: 2428 [2021-12-22 12:55:51,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:55:51,737 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 36 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:51,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3048 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:51,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-12-22 12:55:51,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2426. [2021-12-22 12:55:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2424 states have (on average 1.549917491749175) internal successors, (3757), 2425 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 3757 transitions. [2021-12-22 12:55:51,831 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 3757 transitions. Word has length 66 [2021-12-22 12:55:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:51,831 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 3757 transitions. [2021-12-22 12:55:51,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 3757 transitions. [2021-12-22 12:55:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 12:55:51,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:51,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:55:51,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 12:55:51,832 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash -366937100, now seen corresponding path program 1 times [2021-12-22 12:55:51,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:51,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033989815] [2021-12-22 12:55:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:51,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:55:51,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:51,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033989815] [2021-12-22 12:55:51,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033989815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:51,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:51,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:55:51,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295326383] [2021-12-22 12:55:51,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:51,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:55:51,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:55:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:55:51,869 INFO L87 Difference]: Start difference. First operand 2426 states and 3757 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:52,029 INFO L93 Difference]: Finished difference Result 3826 states and 5729 transitions. [2021-12-22 12:55:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:55:52,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-22 12:55:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:52,041 INFO L225 Difference]: With dead ends: 3826 [2021-12-22 12:55:52,041 INFO L226 Difference]: Without dead ends: 3360 [2021-12-22 12:55:52,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:55:52,043 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3074 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3074 SdHoareTripleChecker+Valid, 3215 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:52,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3074 Valid, 3215 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:55:52,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-12-22 12:55:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2890. [2021-12-22 12:55:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2888 states have (on average 1.5252770083102494) internal successors, (4405), 2889 states have internal predecessors, (4405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4405 transitions. [2021-12-22 12:55:52,224 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4405 transitions. Word has length 66 [2021-12-22 12:55:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:52,225 INFO L470 AbstractCegarLoop]: Abstraction has 2890 states and 4405 transitions. [2021-12-22 12:55:52,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4405 transitions. [2021-12-22 12:55:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 12:55:52,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:52,230 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] [2021-12-22 12:55:52,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 12:55:52,230 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash -914037272, now seen corresponding path program 1 times [2021-12-22 12:55:52,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:52,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158585573] [2021-12-22 12:55:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:52,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:52,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:52,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158585573] [2021-12-22 12:55:52,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158585573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:55:52,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:55:52,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:55:52,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178640278] [2021-12-22 12:55:52,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:55:52,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:55:52,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:55:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:55:52,307 INFO L87 Difference]: Start difference. First operand 2890 states and 4405 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:55:57,454 INFO L93 Difference]: Finished difference Result 5145 states and 8714 transitions. [2021-12-22 12:55:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:55:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-22 12:55:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:55:57,468 INFO L225 Difference]: With dead ends: 5145 [2021-12-22 12:55:57,468 INFO L226 Difference]: Without dead ends: 4392 [2021-12-22 12:55:57,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:55:57,470 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 2342 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5154 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2342 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 6404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 5154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-22 12:55:57,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2342 Valid, 792 Invalid, 6404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 5154 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-22 12:55:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4392 states. [2021-12-22 12:55:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4392 to 4392. [2021-12-22 12:55:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4390 states have (on average 1.4535307517084282) internal successors, (6381), 4391 states have internal predecessors, (6381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 6381 transitions. [2021-12-22 12:55:57,665 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 6381 transitions. Word has length 67 [2021-12-22 12:55:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:55:57,666 INFO L470 AbstractCegarLoop]: Abstraction has 4392 states and 6381 transitions. [2021-12-22 12:55:57,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:55:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 6381 transitions. [2021-12-22 12:55:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 12:55:57,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:55:57,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:55:57,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 12:55:57,669 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:55:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:55:57,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1328887140, now seen corresponding path program 1 times [2021-12-22 12:55:57,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:55:57,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682728928] [2021-12-22 12:55:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:57,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:55:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:55:57,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:55:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682728928] [2021-12-22 12:55:57,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682728928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:55:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482311911] [2021-12-22 12:55:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:55:57,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:55:57,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:55:57,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:55:57,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:55:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:55:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 12:55:57,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:55:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:55:58,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 12:55:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 12:55:58,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482311911] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 12:55:58,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 12:55:58,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-22 12:55:58,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212012019] [2021-12-22 12:55:58,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 12:55:58,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 12:55:58,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:55:58,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 12:55:58,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-22 12:55:58,368 INFO L87 Difference]: Start difference. First operand 4392 states and 6381 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:56:03,021 INFO L93 Difference]: Finished difference Result 24772 states and 34226 transitions. [2021-12-22 12:56:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-22 12:56:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-22 12:56:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:56:03,071 INFO L225 Difference]: With dead ends: 24772 [2021-12-22 12:56:03,071 INFO L226 Difference]: Without dead ends: 22682 [2021-12-22 12:56:03,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4630 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2148, Invalid=10062, Unknown=0, NotChecked=0, Total=12210 [2021-12-22 12:56:03,081 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 16603 mSDsluCounter, 5183 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16603 SdHoareTripleChecker+Valid, 6738 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 12:56:03,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16603 Valid, 6738 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 12:56:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22682 states. [2021-12-22 12:56:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22682 to 13305. [2021-12-22 12:56:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13305 states, 13303 states have (on average 1.3649552732466361) internal successors, (18158), 13304 states have internal predecessors, (18158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 18158 transitions. [2021-12-22 12:56:04,140 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 18158 transitions. Word has length 67 [2021-12-22 12:56:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:56:04,140 INFO L470 AbstractCegarLoop]: Abstraction has 13305 states and 18158 transitions. [2021-12-22 12:56:04,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 18158 transitions. [2021-12-22 12:56:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:56:04,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:56:04,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:56:04,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 12:56:04,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 12:56:04,356 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:56:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:56:04,357 INFO L85 PathProgramCache]: Analyzing trace with hash 620602156, now seen corresponding path program 1 times [2021-12-22 12:56:04,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:56:04,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18933437] [2021-12-22 12:56:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:56:04,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:56:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:56:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:56:04,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:56:04,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18933437] [2021-12-22 12:56:04,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18933437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:56:04,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875429146] [2021-12-22 12:56:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:56:04,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:56:04,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:56:04,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 12:56:04,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 12:56:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:56:04,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 12:56:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:56:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:56:05,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 12:56:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:56:05,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875429146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 12:56:05,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 12:56:05,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-22 12:56:05,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143376401] [2021-12-22 12:56:05,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 12:56:05,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 12:56:05,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:56:05,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 12:56:05,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-22 12:56:05,558 INFO L87 Difference]: Start difference. First operand 13305 states and 18158 transitions. Second operand has 25 states, 25 states have (on average 6.88) internal successors, (172), 24 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:56:23,419 INFO L93 Difference]: Finished difference Result 146293 states and 191724 transitions. [2021-12-22 12:56:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-22 12:56:23,420 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.88) internal successors, (172), 24 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 12:56:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:56:23,707 INFO L225 Difference]: With dead ends: 146293 [2021-12-22 12:56:23,708 INFO L226 Difference]: Without dead ends: 136108 [2021-12-22 12:56:23,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8692 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3558, Invalid=20934, Unknown=0, NotChecked=0, Total=24492 [2021-12-22 12:56:23,754 INFO L933 BasicCegarLoop]: 1622 mSDtfsCounter, 18395 mSDsluCounter, 7499 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18395 SdHoareTripleChecker+Valid, 9121 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:56:23,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18395 Valid, 9121 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 12:56:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136108 states. [2021-12-22 12:56:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136108 to 54762. [2021-12-22 12:56:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54762 states, 54760 states have (on average 1.3195945945945946) internal successors, (72261), 54761 states have internal predecessors, (72261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54762 states to 54762 states and 72261 transitions. [2021-12-22 12:56:30,248 INFO L78 Accepts]: Start accepts. Automaton has 54762 states and 72261 transitions. Word has length 68 [2021-12-22 12:56:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:56:30,248 INFO L470 AbstractCegarLoop]: Abstraction has 54762 states and 72261 transitions. [2021-12-22 12:56:30,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.88) internal successors, (172), 24 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 54762 states and 72261 transitions. [2021-12-22 12:56:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:56:30,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:56:30,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:56:30,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 12:56:30,462 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,SelfDestructingSolverStorable15 [2021-12-22 12:56:30,462 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:56:30,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:56:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1702537876, now seen corresponding path program 1 times [2021-12-22 12:56:30,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:56:30,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149918026] [2021-12-22 12:56:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:56:30,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:56:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:56:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:56:30,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:56:30,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149918026] [2021-12-22 12:56:30,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149918026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:56:30,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:56:30,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:56:30,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921391993] [2021-12-22 12:56:30,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:56:30,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:56:30,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:56:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:56:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:56:30,499 INFO L87 Difference]: Start difference. First operand 54762 states and 72261 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:56:34,161 INFO L93 Difference]: Finished difference Result 79200 states and 103804 transitions. [2021-12-22 12:56:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:56:34,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 12:56:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:56:34,203 INFO L225 Difference]: With dead ends: 79200 [2021-12-22 12:56:34,204 INFO L226 Difference]: Without dead ends: 32120 [2021-12-22 12:56:34,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:56:34,237 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 26 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:56:34,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3030 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:56:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32120 states. [2021-12-22 12:56:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32120 to 31692. [2021-12-22 12:56:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31692 states, 31690 states have (on average 1.2890186178605239) internal successors, (40849), 31691 states have internal predecessors, (40849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31692 states to 31692 states and 40849 transitions. [2021-12-22 12:56:37,354 INFO L78 Accepts]: Start accepts. Automaton has 31692 states and 40849 transitions. Word has length 68 [2021-12-22 12:56:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:56:37,355 INFO L470 AbstractCegarLoop]: Abstraction has 31692 states and 40849 transitions. [2021-12-22 12:56:37,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 31692 states and 40849 transitions. [2021-12-22 12:56:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:56:37,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:56:37,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:56:37,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 12:56:37,358 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:56:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:56:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash 455030260, now seen corresponding path program 1 times [2021-12-22 12:56:37,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:56:37,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106138026] [2021-12-22 12:56:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:56:37,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:56:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:56:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:56:37,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:56:37,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106138026] [2021-12-22 12:56:37,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106138026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:56:37,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:56:37,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:56:37,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434267890] [2021-12-22 12:56:37,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:56:37,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:56:37,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:56:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:56:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:56:37,399 INFO L87 Difference]: Start difference. First operand 31692 states and 40849 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:56:39,453 INFO L93 Difference]: Finished difference Result 47678 states and 61063 transitions. [2021-12-22 12:56:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:56:39,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 12:56:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:56:39,476 INFO L225 Difference]: With dead ends: 47678 [2021-12-22 12:56:39,476 INFO L226 Difference]: Without dead ends: 21614 [2021-12-22 12:56:39,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:56:39,489 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 20 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:56:39,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:56:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21614 states. [2021-12-22 12:56:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21614 to 21612. [2021-12-22 12:56:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21612 states, 21610 states have (on average 1.2683017121702915) internal successors, (27408), 21611 states have internal predecessors, (27408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21612 states to 21612 states and 27408 transitions. [2021-12-22 12:56:41,377 INFO L78 Accepts]: Start accepts. Automaton has 21612 states and 27408 transitions. Word has length 68 [2021-12-22 12:56:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:56:41,378 INFO L470 AbstractCegarLoop]: Abstraction has 21612 states and 27408 transitions. [2021-12-22 12:56:41,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 21612 states and 27408 transitions. [2021-12-22 12:56:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:56:41,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:56:41,380 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:56:41,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 12:56:41,380 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:56:41,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:56:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash 530169440, now seen corresponding path program 1 times [2021-12-22 12:56:41,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:56:41,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469433278] [2021-12-22 12:56:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:56:41,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:56:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:56:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 12:56:41,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:56:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469433278] [2021-12-22 12:56:41,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469433278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:56:41,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:56:41,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:56:41,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004256624] [2021-12-22 12:56:41,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:56:41,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:56:41,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:56:41,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:56:41,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:56:41,423 INFO L87 Difference]: Start difference. First operand 21612 states and 27408 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:56:43,031 INFO L93 Difference]: Finished difference Result 37375 states and 47133 transitions. [2021-12-22 12:56:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:56:43,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 12:56:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:56:43,055 INFO L225 Difference]: With dead ends: 37375 [2021-12-22 12:56:43,055 INFO L226 Difference]: Without dead ends: 18128 [2021-12-22 12:56:43,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:56:43,070 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4553 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:56:43,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 2957 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:56:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18128 states. [2021-12-22 12:56:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18128 to 18128. [2021-12-22 12:56:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18128 states, 18126 states have (on average 1.2589650226194418) internal successors, (22820), 18127 states have internal predecessors, (22820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18128 states to 18128 states and 22820 transitions. [2021-12-22 12:56:44,787 INFO L78 Accepts]: Start accepts. Automaton has 18128 states and 22820 transitions. Word has length 68 [2021-12-22 12:56:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:56:44,787 INFO L470 AbstractCegarLoop]: Abstraction has 18128 states and 22820 transitions. [2021-12-22 12:56:44,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 18128 states and 22820 transitions. [2021-12-22 12:56:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:56:44,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:56:44,789 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:56:44,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 12:56:44,790 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:56:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:56:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1360814688, now seen corresponding path program 1 times [2021-12-22 12:56:44,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:56:44,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043699027] [2021-12-22 12:56:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:56:44,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:56:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:56:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 12:56:44,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:56:44,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043699027] [2021-12-22 12:56:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043699027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:56:44,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:56:44,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:56:44,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722170144] [2021-12-22 12:56:44,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:56:44,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:56:44,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:56:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:56:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:56:44,846 INFO L87 Difference]: Start difference. First operand 18128 states and 22820 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:56:46,160 INFO L93 Difference]: Finished difference Result 29739 states and 37071 transitions. [2021-12-22 12:56:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:56:46,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 12:56:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:56:46,177 INFO L225 Difference]: With dead ends: 29739 [2021-12-22 12:56:46,178 INFO L226 Difference]: Without dead ends: 14008 [2021-12-22 12:56:46,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:56:46,191 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4513 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4513 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:56:46,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4513 Valid, 2962 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:56:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14008 states. [2021-12-22 12:56:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14008 to 14008. [2021-12-22 12:56:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14008 states, 14006 states have (on average 1.252249036127374) internal successors, (17539), 14007 states have internal predecessors, (17539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14008 states to 14008 states and 17539 transitions. [2021-12-22 12:56:47,481 INFO L78 Accepts]: Start accepts. Automaton has 14008 states and 17539 transitions. Word has length 68 [2021-12-22 12:56:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:56:47,481 INFO L470 AbstractCegarLoop]: Abstraction has 14008 states and 17539 transitions. [2021-12-22 12:56:47,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:56:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 14008 states and 17539 transitions. [2021-12-22 12:56:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:56:47,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:56:47,483 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 12:56:47,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 12:56:47,483 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:56:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:56:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1355942016, now seen corresponding path program 1 times [2021-12-22 12:56:47,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:56:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987977018] [2021-12-22 12:56:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:56:47,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:56:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:56:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 12:56:47,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:56:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987977018] [2021-12-22 12:56:47,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987977018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:56:47,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:56:47,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:56:47,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304994628] [2021-12-22 12:56:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:56:47,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:56:47,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:56:47,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:56:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:56:47,519 INFO L87 Difference]: Start difference. First operand 14008 states and 17539 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)