./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/loops-crafted-1/mono-crafted_6.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 a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:54:03,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:54:03,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:54:03,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:54:03,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:54:03,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:54:03,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:54:03,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:54:03,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:54:03,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:54:03,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:54:03,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:54:03,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:54:03,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:54:03,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:54:03,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:54:03,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:54:03,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:54:03,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:54:03,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:54:03,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:54:03,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:54:03,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:54:03,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:54:03,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:54:03,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:54:03,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:54:03,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:54:03,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:54:03,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:54:03,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:54:03,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:54:03,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:54:03,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:54:03,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:54:03,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:54:03,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:54:03,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:54:03,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:54:03,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:54:03,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:54:03,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:54:03,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:54:03,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:54:03,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:54:03,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:54:03,913 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:54:03,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:54:03,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:54:03,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:54:03,913 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:54:03,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:54:03,922 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:54:03,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:54:03,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:54:03,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:54:03,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:54:03,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:54:03,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:54:03,924 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:54:03,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:54:03,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:54:03,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:54:03,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:54:03,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:54:03,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:54:03,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:54:03,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:54:03,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:54:03,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:54:03,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:54:03,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:54:03,927 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:54:03,927 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:54:03,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:54:03,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:54:03,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d [2021-12-14 13:54:04,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:54:04,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:54:04,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:54:04,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:54:04,144 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:54:04,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-12-14 13:54:04,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f7809b33/a7d5d5c4721e44129a12f238a175f06e/FLAG31e577495 [2021-12-14 13:54:04,494 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:54:04,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-12-14 13:54:04,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f7809b33/a7d5d5c4721e44129a12f238a175f06e/FLAG31e577495 [2021-12-14 13:54:04,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f7809b33/a7d5d5c4721e44129a12f238a175f06e [2021-12-14 13:54:04,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:54:04,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:54:04,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:54:04,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:54:04,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:54:04,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:54:04" (1/1) ... [2021-12-14 13:54:04,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769381f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:04, skipping insertion in model container [2021-12-14 13:54:04,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:54:04" (1/1) ... [2021-12-14 13:54:04,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:54:04,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:54:05,078 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/loops-crafted-1/mono-crafted_6.c[318,331] [2021-12-14 13:54:05,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:54:05,097 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:54:05,106 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/loops-crafted-1/mono-crafted_6.c[318,331] [2021-12-14 13:54:05,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:54:05,117 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:54:05,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05 WrapperNode [2021-12-14 13:54:05,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:54:05,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:54:05,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:54:05,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:54:05,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,141 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-12-14 13:54:05,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:54:05,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:54:05,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:54:05,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:54:05,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:54:05,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:54:05,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:54:05,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:54:05,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (1/1) ... [2021-12-14 13:54:05,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:54:05,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:05,188 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) [2021-12-14 13:54:05,208 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 [2021-12-14 13:54:05,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:54:05,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:54:05,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:54:05,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:54:05,255 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:54:05,256 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:54:05,358 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:54:05,363 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:54:05,363 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 13:54:05,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:54:05 BoogieIcfgContainer [2021-12-14 13:54:05,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:54:05,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:54:05,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:54:05,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:54:05,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:54:04" (1/3) ... [2021-12-14 13:54:05,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437bf861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:54:05, skipping insertion in model container [2021-12-14 13:54:05,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:54:05" (2/3) ... [2021-12-14 13:54:05,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437bf861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:54:05, skipping insertion in model container [2021-12-14 13:54:05,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:54:05" (3/3) ... [2021-12-14 13:54:05,371 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2021-12-14 13:54:05,375 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:54:05,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:54:05,415 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:54:05,421 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 [2021-12-14 13:54:05,421 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:54:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2021-12-14 13:54:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:54:05,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:05,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:54:05,438 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2021-12-14 13:54:05,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:05,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841937555] [2021-12-14 13:54:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:05,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:05,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:05,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841937555] [2021-12-14 13:54:05,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841937555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:54:05,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:54:05,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:54:05,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180624853] [2021-12-14 13:54:05,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:54:05,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:54:05,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:54:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:54:05,655 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-14 13:54:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:05,686 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-12-14 13:54:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:54:05,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-12-14 13:54:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:05,693 INFO L225 Difference]: With dead ends: 28 [2021-12-14 13:54:05,693 INFO L226 Difference]: Without dead ends: 12 [2021-12-14 13:54:05,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:54:05,698 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:05,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-14 13:54:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-14 13:54:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-12-14 13:54:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-14 13:54:05,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-12-14 13:54:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:05,723 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-14 13:54:05,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-14 13:54:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-14 13:54:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 13:54:05,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:05,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:05,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:54:05,725 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash 295698875, now seen corresponding path program 1 times [2021-12-14 13:54:05,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:05,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849313733] [2021-12-14 13:54:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:05,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:05,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:05,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849313733] [2021-12-14 13:54:05,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849313733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:05,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510257002] [2021-12-14 13:54:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:05,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:05,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:05,772 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) [2021-12-14 13:54:05,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:54:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:05,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 13:54:05,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:05,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:54:05,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510257002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:05,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:05,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 13:54:05,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868497025] [2021-12-14 13:54:05,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:05,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 13:54:05,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:05,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 13:54:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:54:05,864 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-12-14 13:54:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:05,897 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2021-12-14 13:54:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:54:05,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 8 [2021-12-14 13:54:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:05,899 INFO L225 Difference]: With dead ends: 26 [2021-12-14 13:54:05,899 INFO L226 Difference]: Without dead ends: 18 [2021-12-14 13:54:05,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:54:05,901 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:05,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-14 13:54:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-12-14 13:54:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2021-12-14 13:54:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-14 13:54:05,904 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-12-14 13:54:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:05,904 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-14 13:54:05,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-12-14 13:54:05,905 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-14 13:54:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 13:54:05,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:05,905 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:05,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 13:54:06,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:06,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash 890916581, now seen corresponding path program 1 times [2021-12-14 13:54:06,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:06,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502947798] [2021-12-14 13:54:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:06,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 13:54:06,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502947798] [2021-12-14 13:54:06,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502947798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:54:06,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:54:06,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:54:06,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581870059] [2021-12-14 13:54:06,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:54:06,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:54:06,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:54:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:54:06,156 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-14 13:54:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:06,173 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-12-14 13:54:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:54:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 14 [2021-12-14 13:54:06,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:06,174 INFO L225 Difference]: With dead ends: 29 [2021-12-14 13:54:06,174 INFO L226 Difference]: Without dead ends: 19 [2021-12-14 13:54:06,174 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 [2021-12-14 13:54:06,176 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:06,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-14 13:54:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-14 13:54:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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) [2021-12-14 13:54:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-14 13:54:06,184 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-12-14 13:54:06,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:06,185 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-14 13:54:06,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-14 13:54:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-14 13:54:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 13:54:06,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:06,187 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:06,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 13:54:06,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash -894818322, now seen corresponding path program 1 times [2021-12-14 13:54:06,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:06,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895289478] [2021-12-14 13:54:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:06,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:06,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:06,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895289478] [2021-12-14 13:54:06,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895289478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:06,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484079837] [2021-12-14 13:54:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:06,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:06,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:06,223 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) [2021-12-14 13:54:06,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:54:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:06,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:54:06,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:06,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:06,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484079837] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:06,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:06,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-14 13:54:06,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123875896] [2021-12-14 13:54:06,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:06,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 13:54:06,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 13:54:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:54:06,327 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-12-14 13:54:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:06,348 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-12-14 13:54:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 13:54:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 18 [2021-12-14 13:54:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:06,349 INFO L225 Difference]: With dead ends: 40 [2021-12-14 13:54:06,350 INFO L226 Difference]: Without dead ends: 27 [2021-12-14 13:54:06,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:54:06,351 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:06,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-14 13:54:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-14 13:54:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2021-12-14 13:54:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-14 13:54:06,355 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-12-14 13:54:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:06,355 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-14 13:54:06,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-12-14 13:54:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-14 13:54:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 13:54:06,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:06,356 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:06,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:06,574 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,SelfDestructingSolverStorable3 [2021-12-14 13:54:06,575 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash 118887930, now seen corresponding path program 2 times [2021-12-14 13:54:06,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:06,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608640832] [2021-12-14 13:54:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:06,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:06,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608640832] [2021-12-14 13:54:06,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608640832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:06,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709290926] [2021-12-14 13:54:06,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:54:06,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:06,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:06,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:06,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:54:06,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:54:06,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 13:54:06,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:06,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:06,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709290926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:06,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:06,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-14 13:54:06,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098814098] [2021-12-14 13:54:06,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:06,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 13:54:06,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 13:54:06,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-14 13:54:06,955 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-12-14 13:54:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:06,998 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-12-14 13:54:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 13:54:06,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 26 [2021-12-14 13:54:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:07,001 INFO L225 Difference]: With dead ends: 56 [2021-12-14 13:54:07,002 INFO L226 Difference]: Without dead ends: 43 [2021-12-14 13:54:07,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-14 13:54:07,003 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:07,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:54:07,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-14 13:54:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-14 13:54:07,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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) [2021-12-14 13:54:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-12-14 13:54:07,012 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2021-12-14 13:54:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:07,013 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-12-14 13:54:07,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-12-14 13:54:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-12-14 13:54:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 13:54:07,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:07,015 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:07,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:07,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:07,237 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:07,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash -173044206, now seen corresponding path program 3 times [2021-12-14 13:54:07,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:07,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411657157] [2021-12-14 13:54:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:07,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:54:07,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:07,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411657157] [2021-12-14 13:54:07,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411657157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930027222] [2021-12-14 13:54:07,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:54:07,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:07,405 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:07,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:54:07,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-14 13:54:07,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:07,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:54:07,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-14 13:54:07,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-14 13:54:07,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930027222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:07,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:07,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 21 [2021-12-14 13:54:07,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083405603] [2021-12-14 13:54:07,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:07,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 13:54:07,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 13:54:07,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-12-14 13:54:07,603 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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) [2021-12-14 13:54:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:07,673 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-12-14 13:54:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 13:54:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 42 [2021-12-14 13:54:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:07,674 INFO L225 Difference]: With dead ends: 70 [2021-12-14 13:54:07,674 INFO L226 Difference]: Without dead ends: 57 [2021-12-14 13:54:07,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-12-14 13:54:07,675 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:07,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 30 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:54:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-14 13:54:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-14 13:54:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 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) [2021-12-14 13:54:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-14 13:54:07,680 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 42 [2021-12-14 13:54:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:07,680 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-14 13:54:07,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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) [2021-12-14 13:54:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-14 13:54:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-14 13:54:07,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:07,682 INFO L514 BasicCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:07,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:07,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:07,895 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1187818742, now seen corresponding path program 4 times [2021-12-14 13:54:07,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:07,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583697054] [2021-12-14 13:54:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:07,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-14 13:54:08,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:08,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583697054] [2021-12-14 13:54:08,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583697054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:08,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977221992] [2021-12-14 13:54:08,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:54:08,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:08,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:08,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:08,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:54:08,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:54:08,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:08,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 13:54:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-14 13:54:08,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-14 13:54:08,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977221992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:08,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:08,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-12-14 13:54:08,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077257782] [2021-12-14 13:54:08,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:08,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 13:54:08,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 13:54:08,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 13:54:08,551 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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) [2021-12-14 13:54:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:08,630 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2021-12-14 13:54:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 13:54:08,631 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 56 [2021-12-14 13:54:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:08,632 INFO L225 Difference]: With dead ends: 116 [2021-12-14 13:54:08,632 INFO L226 Difference]: Without dead ends: 91 [2021-12-14 13:54:08,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 13:54:08,633 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:08,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:54:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-14 13:54:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-14 13:54:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 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) [2021-12-14 13:54:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-12-14 13:54:08,646 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 56 [2021-12-14 13:54:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:08,646 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-12-14 13:54:08,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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) [2021-12-14 13:54:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-12-14 13:54:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 13:54:08,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:08,650 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:08,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:08,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:08,851 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1855342691, now seen corresponding path program 5 times [2021-12-14 13:54:08,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:08,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987529113] [2021-12-14 13:54:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:08,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-14 13:54:09,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:09,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987529113] [2021-12-14 13:54:09,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987529113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:09,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268253440] [2021-12-14 13:54:09,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:54:09,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:09,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:09,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 13:54:09,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-14 13:54:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 13:54:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-12-14 13:54:09,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-12-14 13:54:10,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268253440] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:10,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:10,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17, 17] total 65 [2021-12-14 13:54:10,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426080150] [2021-12-14 13:54:10,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:10,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-14 13:54:10,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-14 13:54:10,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-14 13:54:10,428 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 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) [2021-12-14 13:54:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:10,660 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2021-12-14 13:54:10,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-14 13:54:10,660 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 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 90 [2021-12-14 13:54:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:10,662 INFO L225 Difference]: With dead ends: 234 [2021-12-14 13:54:10,662 INFO L226 Difference]: Without dead ends: 209 [2021-12-14 13:54:10,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-14 13:54:10,664 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 164 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:10,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 63 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:54:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-14 13:54:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-12-14 13:54:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.1875) internal successors, (247), 208 states have internal predecessors, (247), 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) [2021-12-14 13:54:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 247 transitions. [2021-12-14 13:54:10,673 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 247 transitions. Word has length 90 [2021-12-14 13:54:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:10,674 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 247 transitions. [2021-12-14 13:54:10,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 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) [2021-12-14 13:54:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 247 transitions. [2021-12-14 13:54:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-14 13:54:10,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:10,676 INFO L514 BasicCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:10,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 13:54:10,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:10,891 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:10,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:10,892 INFO L85 PathProgramCache]: Analyzing trace with hash 960421829, now seen corresponding path program 6 times [2021-12-14 13:54:10,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:10,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806238118] [2021-12-14 13:54:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:10,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-12-14 13:54:11,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:11,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806238118] [2021-12-14 13:54:11,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806238118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:11,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385148375] [2021-12-14 13:54:11,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:54:11,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:11,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:11,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:11,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 13:54:11,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-14 13:54:11,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:11,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 13:54:11,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2021-12-14 13:54:11,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2021-12-14 13:54:12,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385148375] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:12,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:12,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 46 [2021-12-14 13:54:12,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809771506] [2021-12-14 13:54:12,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:12,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-14 13:54:12,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:12,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-14 13:54:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 13:54:12,097 INFO L87 Difference]: Start difference. First operand 209 states and 247 transitions. Second operand has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 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) [2021-12-14 13:54:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:12,238 INFO L93 Difference]: Finished difference Result 376 states and 471 transitions. [2021-12-14 13:54:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-14 13:54:12,238 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 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 208 [2021-12-14 13:54:12,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:12,239 INFO L225 Difference]: With dead ends: 376 [2021-12-14 13:54:12,240 INFO L226 Difference]: Without dead ends: 235 [2021-12-14 13:54:12,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 13:54:12,241 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:12,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 30 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:54:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-14 13:54:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-12-14 13:54:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.2179487179487178) internal successors, (285), 234 states have internal predecessors, (285), 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) [2021-12-14 13:54:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 285 transitions. [2021-12-14 13:54:12,250 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 285 transitions. Word has length 208 [2021-12-14 13:54:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:12,250 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 285 transitions. [2021-12-14 13:54:12,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 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) [2021-12-14 13:54:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 285 transitions. [2021-12-14 13:54:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-14 13:54:12,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:12,253 INFO L514 BasicCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:12,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:12,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:12,467 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:12,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:12,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1401661778, now seen corresponding path program 7 times [2021-12-14 13:54:12,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:12,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277762672] [2021-12-14 13:54:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:12,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-14 13:54:12,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:12,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277762672] [2021-12-14 13:54:12,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277762672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:12,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760582691] [2021-12-14 13:54:12,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:54:12,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:12,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:12,944 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:12,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 13:54:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:13,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 13:54:13,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-14 13:54:13,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-14 13:54:14,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760582691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:14,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:14,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2021-12-14 13:54:14,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283211353] [2021-12-14 13:54:14,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:14,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-14 13:54:14,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:14,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-14 13:54:14,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-12-14 13:54:14,711 INFO L87 Difference]: Start difference. First operand 235 states and 285 transitions. Second operand has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 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) [2021-12-14 13:54:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:14,865 INFO L93 Difference]: Finished difference Result 472 states and 608 transitions. [2021-12-14 13:54:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-14 13:54:14,866 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 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 234 [2021-12-14 13:54:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:14,868 INFO L225 Difference]: With dead ends: 472 [2021-12-14 13:54:14,868 INFO L226 Difference]: Without dead ends: 307 [2021-12-14 13:54:14,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-12-14 13:54:14,871 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:14,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:54:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-14 13:54:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-12-14 13:54:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.1666666666666667) internal successors, (357), 306 states have internal predecessors, (357), 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) [2021-12-14 13:54:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2021-12-14 13:54:14,885 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 234 [2021-12-14 13:54:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:14,885 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2021-12-14 13:54:14,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 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) [2021-12-14 13:54:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2021-12-14 13:54:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-14 13:54:14,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:14,888 INFO L514 BasicCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:14,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:15,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 13:54:15,105 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:15,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1256502206, now seen corresponding path program 8 times [2021-12-14 13:54:15,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:15,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587900903] [2021-12-14 13:54:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:15,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-14 13:54:16,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:16,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587900903] [2021-12-14 13:54:16,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587900903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:16,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697031192] [2021-12-14 13:54:16,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:54:16,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:16,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:16,707 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:16,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 13:54:16,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:54:16,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-14 13:54:16,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-14 13:54:17,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-14 13:54:21,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697031192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:21,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:21,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 145 [2021-12-14 13:54:21,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800726668] [2021-12-14 13:54:21,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:21,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-12-14 13:54:21,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:21,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-12-14 13:54:21,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2021-12-14 13:54:21,822 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 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) [2021-12-14 13:54:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:22,255 INFO L93 Difference]: Finished difference Result 616 states and 788 transitions. [2021-12-14 13:54:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-12-14 13:54:22,256 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 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 306 [2021-12-14 13:54:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:22,257 INFO L225 Difference]: With dead ends: 616 [2021-12-14 13:54:22,257 INFO L226 Difference]: Without dead ends: 451 [2021-12-14 13:54:22,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2021-12-14 13:54:22,261 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:22,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 13:54:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-14 13:54:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2021-12-14 13:54:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.1133333333333333) internal successors, (501), 450 states have internal predecessors, (501), 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) [2021-12-14 13:54:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 501 transitions. [2021-12-14 13:54:22,270 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 501 transitions. Word has length 306 [2021-12-14 13:54:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:22,270 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 501 transitions. [2021-12-14 13:54:22,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 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) [2021-12-14 13:54:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 501 transitions. [2021-12-14 13:54:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-12-14 13:54:22,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:22,275 INFO L514 BasicCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:22,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:22,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:22,493 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash -932895594, now seen corresponding path program 9 times [2021-12-14 13:54:22,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:22,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420872140] [2021-12-14 13:54:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:22,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-14 13:54:28,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:28,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420872140] [2021-12-14 13:54:28,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420872140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:28,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087058423] [2021-12-14 13:54:28,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:54:28,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:28,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:28,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:28,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 13:54:28,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-14 13:54:28,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:28,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 13:54:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2021-12-14 13:54:29,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2021-12-14 13:54:31,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087058423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:31,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:31,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 13, 13] total 167 [2021-12-14 13:54:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460827596] [2021-12-14 13:54:31,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:31,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-12-14 13:54:31,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-12-14 13:54:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2021-12-14 13:54:31,097 INFO L87 Difference]: Start difference. First operand 451 states and 501 transitions. Second operand has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 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) [2021-12-14 13:54:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:32,053 INFO L93 Difference]: Finished difference Result 666 states and 803 transitions. [2021-12-14 13:54:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-12-14 13:54:32,053 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 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 450 [2021-12-14 13:54:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:32,055 INFO L225 Difference]: With dead ends: 666 [2021-12-14 13:54:32,055 INFO L226 Difference]: Without dead ends: 501 [2021-12-14 13:54:32,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 878 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2021-12-14 13:54:32,057 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 352 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 1097 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1097 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:32,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 39 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1097 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 13:54:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-14 13:54:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2021-12-14 13:54:32,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.15) internal successors, (575), 500 states have internal predecessors, (575), 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) [2021-12-14 13:54:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 575 transitions. [2021-12-14 13:54:32,066 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 575 transitions. Word has length 450 [2021-12-14 13:54:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:32,067 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 575 transitions. [2021-12-14 13:54:32,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 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) [2021-12-14 13:54:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 575 transitions. [2021-12-14 13:54:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-12-14 13:54:32,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:32,070 INFO L514 BasicCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:32,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:32,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 13:54:32,271 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash -278359667, now seen corresponding path program 10 times [2021-12-14 13:54:32,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:32,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925895954] [2021-12-14 13:54:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:32,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:54:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-14 13:54:38,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:54:38,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925895954] [2021-12-14 13:54:38,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925895954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:54:38,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926178993] [2021-12-14 13:54:38,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:54:38,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:54:38,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:54:38,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:54:38,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 13:54:38,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:54:38,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:54:38,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-14 13:54:38,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:54:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-14 13:54:38,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:54:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-14 13:54:56,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926178993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:54:56,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:54:56,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146, 146] total 291 [2021-12-14 13:54:56,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879201820] [2021-12-14 13:54:56,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:54:56,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 291 states [2021-12-14 13:54:56,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:54:56,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 291 interpolants. [2021-12-14 13:54:56,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42195, Invalid=42195, Unknown=0, NotChecked=0, Total=84390 [2021-12-14 13:54:56,418 INFO L87 Difference]: Start difference. First operand 501 states and 575 transitions. Second operand has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 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) [2021-12-14 13:54:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:54:57,544 INFO L93 Difference]: Finished difference Result 1004 states and 1297 transitions. [2021-12-14 13:54:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-12-14 13:54:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 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 500 [2021-12-14 13:54:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:54:57,547 INFO L225 Difference]: With dead ends: 1004 [2021-12-14 13:54:57,547 INFO L226 Difference]: Without dead ends: 791 [2021-12-14 13:54:57,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=42195, Invalid=42195, Unknown=0, NotChecked=0, Total=84390 [2021-12-14 13:54:57,551 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 13:54:57,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 13:54:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-12-14 13:54:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 791. [2021-12-14 13:54:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.0949367088607596) internal successors, (865), 790 states have internal predecessors, (865), 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) [2021-12-14 13:54:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 865 transitions. [2021-12-14 13:54:57,584 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 865 transitions. Word has length 500 [2021-12-14 13:54:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:54:57,584 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 865 transitions. [2021-12-14 13:54:57,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 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) [2021-12-14 13:54:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 865 transitions. [2021-12-14 13:54:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2021-12-14 13:54:57,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:54:57,589 INFO L514 BasicCegarLoop]: trace histogram [340, 288, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1] [2021-12-14 13:54:57,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 13:54:57,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 13:54:57,806 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:54:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:54:57,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1077236000, now seen corresponding path program 11 times [2021-12-14 13:54:57,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:54:57,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784896930] [2021-12-14 13:54:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:54:57,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:54:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat