./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 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/uthash-2.0.2/uthash_SAX_test7-2.i -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 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-06 01:58:23,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 01:58:23,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 01:58:23,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 01:58:23,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 01:58:23,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 01:58:23,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 01:58:23,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 01:58:23,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 01:58:23,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 01:58:23,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 01:58:23,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 01:58:23,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 01:58:23,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 01:58:23,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 01:58:23,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 01:58:23,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 01:58:23,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 01:58:23,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 01:58:23,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 01:58:23,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 01:58:23,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 01:58:23,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 01:58:23,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 01:58:23,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 01:58:23,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 01:58:23,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 01:58:23,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 01:58:23,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 01:58:23,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 01:58:23,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 01:58:23,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 01:58:23,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 01:58:23,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 01:58:23,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 01:58:23,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 01:58:23,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 01:58:23,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 01:58:23,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 01:58:23,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 01:58:23,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 01:58:23,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-06 01:58:23,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 01:58:23,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 01:58:23,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 01:58:23,291 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 01:58:23,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 01:58:23,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 01:58:23,293 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 01:58:23,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 01:58:23,293 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-06 01:58:23,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 01:58:23,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-06 01:58:23,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 01:58:23,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 01:58:23,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 01:58:23,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 01:58:23,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-06 01:58:23,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 01:58:23,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 01:58:23,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 01:58:23,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 01:58:23,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 01:58:23,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 01:58:23,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 01:58:23,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 01:58:23,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 01:58:23,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 01:58:23,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 01:58:23,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 01:58:23,304 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 01:58:23,304 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 01:58:23,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 01:58:23,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 01:58:23,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f [2021-11-06 01:58:23,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 01:58:23,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 01:58:23,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 01:58:23,588 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 01:58:23,588 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 01:58:23,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2021-11-06 01:58:23,640 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5049ae65/a26b60044e6a42af9469c9dc091fc1c4/FLAGcd3ab766e [2021-11-06 01:58:24,122 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 01:58:24,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2021-11-06 01:58:24,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5049ae65/a26b60044e6a42af9469c9dc091fc1c4/FLAGcd3ab766e [2021-11-06 01:58:24,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5049ae65/a26b60044e6a42af9469c9dc091fc1c4 [2021-11-06 01:58:24,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 01:58:24,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 01:58:24,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 01:58:24,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 01:58:24,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 01:58:24,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:24,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f08c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24, skipping insertion in model container [2021-11-06 01:58:24,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:24,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 01:58:24,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 01:58:24,522 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2021-11-06 01:58:24,636 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2021-11-06 01:58:24,637 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2021-11-06 01:58:24,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 01:58:24,666 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 01:58:24,698 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2021-11-06 01:58:24,777 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2021-11-06 01:58:24,777 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2021-11-06 01:58:24,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 01:58:24,823 INFO L208 MainTranslator]: Completed translation [2021-11-06 01:58:24,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24 WrapperNode [2021-11-06 01:58:24,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 01:58:24,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 01:58:24,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 01:58:24,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 01:58:24,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:24,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:24,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 01:58:24,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 01:58:24,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 01:58:24,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 01:58:24,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:24,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:24,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:24,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:25,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:25,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:25,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:25,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 01:58:25,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 01:58:25,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 01:58:25,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 01:58:25,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (1/1) ... [2021-11-06 01:58:25,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 01:58:25,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:25,076 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) [2021-11-06 01:58:25,099 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 [2021-11-06 01:58:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 01:58:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 01:58:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 01:58:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 01:58:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 01:58:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-06 01:58:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 01:58:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 01:58:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 01:58:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 01:58:25,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 01:58:26,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 01:58:26,136 INFO L299 CfgBuilder]: Removed 82 assume(true) statements. [2021-11-06 01:58:26,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:58:26 BoogieIcfgContainer [2021-11-06 01:58:26,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 01:58:26,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 01:58:26,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 01:58:26,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 01:58:26,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 01:58:24" (1/3) ... [2021-11-06 01:58:26,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d90a368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:58:26, skipping insertion in model container [2021-11-06 01:58:26,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:24" (2/3) ... [2021-11-06 01:58:26,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d90a368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:58:26, skipping insertion in model container [2021-11-06 01:58:26,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:58:26" (3/3) ... [2021-11-06 01:58:26,144 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test7-2.i [2021-11-06 01:58:26,148 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 01:58:26,148 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-06 01:58:26,179 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 01:58:26,185 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 [2021-11-06 01:58:26,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-06 01:58:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 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) [2021-11-06 01:58:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-06 01:58:26,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:26,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:26,203 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:26,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1366407864, now seen corresponding path program 1 times [2021-11-06 01:58:26,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:26,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297368774] [2021-11-06 01:58:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:26,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:26,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:26,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297368774] [2021-11-06 01:58:26,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297368774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:26,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:26,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 01:58:26,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123161446] [2021-11-06 01:58:26,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:26,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 01:58:26,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 01:58:26,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 01:58:26,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 01:58:26,373 INFO L87 Difference]: Start difference. First operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-06 01:58:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:26,401 INFO L93 Difference]: Finished difference Result 419 states and 707 transitions. [2021-11-06 01:58:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 01:58:26,403 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 [2021-11-06 01:58:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:26,410 INFO L225 Difference]: With dead ends: 419 [2021-11-06 01:58:26,410 INFO L226 Difference]: Without dead ends: 177 [2021-11-06 01:58:26,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 01:58:26,416 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:26,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-06 01:58:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-06 01:58:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-06 01:58:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 176 states have internal predecessors, (232), 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) [2021-11-06 01:58:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2021-11-06 01:58:26,449 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 8 [2021-11-06 01:58:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:26,449 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2021-11-06 01:58:26,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-06 01:58:26,450 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2021-11-06 01:58:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-06 01:58:26,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:26,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:26,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 01:58:26,451 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1136278917, now seen corresponding path program 1 times [2021-11-06 01:58:26,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:26,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512306345] [2021-11-06 01:58:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:26,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:26,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:26,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512306345] [2021-11-06 01:58:26,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512306345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:26,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:26,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 01:58:26,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62678563] [2021-11-06 01:58:26,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:26,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 01:58:26,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 01:58:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 01:58:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 01:58:26,540 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-06 01:58:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:26,900 INFO L93 Difference]: Finished difference Result 382 states and 501 transitions. [2021-11-06 01:58:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 01:58:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-06 01:58:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:26,902 INFO L225 Difference]: With dead ends: 382 [2021-11-06 01:58:26,902 INFO L226 Difference]: Without dead ends: 295 [2021-11-06 01:58:26,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.26ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 01:58:26,903 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 146 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.77ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 311.95ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:26,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 564 Invalid, 158 Unknown, 0 Unchecked, 7.77ms Time], IncrementalHoareTripleChecker [3 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 311.95ms Time] [2021-11-06 01:58:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-06 01:58:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 179. [2021-11-06 01:58:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.3220338983050848) internal successors, (234), 178 states have internal predecessors, (234), 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) [2021-11-06 01:58:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 234 transitions. [2021-11-06 01:58:26,915 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 234 transitions. Word has length 10 [2021-11-06 01:58:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:26,915 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 234 transitions. [2021-11-06 01:58:26,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-06 01:58:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 234 transitions. [2021-11-06 01:58:26,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 01:58:26,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:26,927 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:26,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 01:58:26,928 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2095912151, now seen corresponding path program 1 times [2021-11-06 01:58:26,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:26,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719157563] [2021-11-06 01:58:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:26,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:26,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 01:58:26,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46530782] [2021-11-06 01:58:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:26,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 01:58:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:26,952 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) [2021-11-06 01:58:26,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 01:58:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:27,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:27,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-06 01:58:27,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:27,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719157563] [2021-11-06 01:58:27,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 01:58:27,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46530782] [2021-11-06 01:58:27,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46530782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:27,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:27,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 01:58:27,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806190277] [2021-11-06 01:58:27,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:27,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 01:58:27,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 01:58:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 01:58:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 01:58:27,305 INFO L87 Difference]: Start difference. First operand 179 states and 234 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-06 01:58:27,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:27,347 INFO L93 Difference]: Finished difference Result 375 states and 495 transitions. [2021-11-06 01:58:27,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 01:58:27,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-11-06 01:58:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:27,348 INFO L225 Difference]: With dead ends: 375 [2021-11-06 01:58:27,348 INFO L226 Difference]: Without dead ends: 200 [2021-11-06 01:58:27,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.77ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 01:58:27,350 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 9 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.69ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:27,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 409 Invalid, 72 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 36.69ms Time] [2021-11-06 01:58:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-06 01:58:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-06 01:58:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 197 states have (on average 1.2893401015228427) internal successors, (254), 198 states have internal predecessors, (254), 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) [2021-11-06 01:58:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 254 transitions. [2021-11-06 01:58:27,358 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 254 transitions. Word has length 62 [2021-11-06 01:58:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:27,358 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 254 transitions. [2021-11-06 01:58:27,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-06 01:58:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 254 transitions. [2021-11-06 01:58:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 01:58:27,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:27,360 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:27,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:27,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 01:58:27,561 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:27,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1305568807, now seen corresponding path program 1 times [2021-11-06 01:58:27,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:27,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064052846] [2021-11-06 01:58:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:27,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:27,574 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 01:58:27,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464915378] [2021-11-06 01:58:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:27,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 01:58:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:27,576 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) [2021-11-06 01:58:27,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 01:58:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:27,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-06 01:58:27,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:27,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064052846] [2021-11-06 01:58:27,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 01:58:27,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464915378] [2021-11-06 01:58:27,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464915378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:27,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:27,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 01:58:27,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074702499] [2021-11-06 01:58:27,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:27,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 01:58:27,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 01:58:27,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 01:58:27,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 01:58:27,816 INFO L87 Difference]: Start difference. First operand 199 states and 254 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2021-11-06 01:58:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:27,870 INFO L93 Difference]: Finished difference Result 386 states and 496 transitions. [2021-11-06 01:58:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 01:58:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 62 [2021-11-06 01:58:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:27,872 INFO L225 Difference]: With dead ends: 386 [2021-11-06 01:58:27,872 INFO L226 Difference]: Without dead ends: 191 [2021-11-06 01:58:27,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.09ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 01:58:27,878 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 220 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.22ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:27,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 420 Invalid, 66 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 42.22ms Time] [2021-11-06 01:58:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-06 01:58:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 185. [2021-11-06 01:58:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.273224043715847) internal successors, (233), 184 states have internal predecessors, (233), 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) [2021-11-06 01:58:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2021-11-06 01:58:27,886 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 62 [2021-11-06 01:58:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:27,886 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2021-11-06 01:58:27,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2021-11-06 01:58:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2021-11-06 01:58:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 01:58:27,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:27,888 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:27,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:28,103 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 [2021-11-06 01:58:28,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1777715509, now seen corresponding path program 1 times [2021-11-06 01:58:28,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:28,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796508215] [2021-11-06 01:58:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:28,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:28,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 01:58:28,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061187841] [2021-11-06 01:58:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:28,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 01:58:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:28,127 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) [2021-11-06 01:58:28,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 01:58:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:28,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 01:58:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:28,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-06 01:58:28,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:28,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796508215] [2021-11-06 01:58:28,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 01:58:28,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061187841] [2021-11-06 01:58:28,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061187841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:28,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:28,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 01:58:28,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925878180] [2021-11-06 01:58:28,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:28,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 01:58:28,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 01:58:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 01:58:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 01:58:28,478 INFO L87 Difference]: Start difference. First operand 185 states and 233 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-06 01:58:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:28,545 INFO L93 Difference]: Finished difference Result 479 states and 602 transitions. [2021-11-06 01:58:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 01:58:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-11-06 01:58:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:28,547 INFO L225 Difference]: With dead ends: 479 [2021-11-06 01:58:28,547 INFO L226 Difference]: Without dead ends: 298 [2021-11-06 01:58:28,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.61ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 01:58:28,548 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 105 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.51ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:28,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 463 Invalid, 32 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 58.51ms Time] [2021-11-06 01:58:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-06 01:58:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2021-11-06 01:58:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 289 states have (on average 1.2664359861591696) internal successors, (366), 290 states have internal predecessors, (366), 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) [2021-11-06 01:58:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2021-11-06 01:58:28,563 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 62 [2021-11-06 01:58:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:28,564 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2021-11-06 01:58:28,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-06 01:58:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2021-11-06 01:58:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-06 01:58:28,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:28,570 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:28,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:28,786 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 [2021-11-06 01:58:28,786 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1300403396, now seen corresponding path program 1 times [2021-11-06 01:58:28,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:28,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687888242] [2021-11-06 01:58:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:28,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:28,808 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 01:58:28,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818739637] [2021-11-06 01:58:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:28,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 01:58:28,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:28,809 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) [2021-11-06 01:58:28,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 01:58:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:28,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:29,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-06 01:58:29,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-06 01:58:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 01:58:29,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-06 01:58:29,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:29,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687888242] [2021-11-06 01:58:29,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 01:58:29,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818739637] [2021-11-06 01:58:29,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818739637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:29,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:29,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 01:58:29,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978335350] [2021-11-06 01:58:29,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:29,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 01:58:29,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 01:58:29,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 01:58:29,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 01:58:29,090 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 01:58:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:29,360 INFO L93 Difference]: Finished difference Result 379 states and 483 transitions. [2021-11-06 01:58:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 01:58:29,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-06 01:58:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:29,362 INFO L225 Difference]: With dead ends: 379 [2021-11-06 01:58:29,362 INFO L226 Difference]: Without dead ends: 375 [2021-11-06 01:58:29,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.89ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 01:58:29,362 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 135 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.23ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:29,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 564 Invalid, 137 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 252.23ms Time] [2021-11-06 01:58:29,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-06 01:58:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 293. [2021-11-06 01:58:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 291 states have (on average 1.2646048109965635) internal successors, (368), 292 states have internal predecessors, (368), 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) [2021-11-06 01:58:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 368 transitions. [2021-11-06 01:58:29,369 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 368 transitions. Word has length 69 [2021-11-06 01:58:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:29,369 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 368 transitions. [2021-11-06 01:58:29,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 01:58:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 368 transitions. [2021-11-06 01:58:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 01:58:29,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:29,371 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:29,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:29,587 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 [2021-11-06 01:58:29,587 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:29,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2000986198, now seen corresponding path program 1 times [2021-11-06 01:58:29,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:29,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548513290] [2021-11-06 01:58:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:29,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:29,599 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 01:58:29,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454229551] [2021-11-06 01:58:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:29,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 01:58:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:29,600 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) [2021-11-06 01:58:29,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 01:58:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:29,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 01:58:29,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-06 01:58:29,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:29,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548513290] [2021-11-06 01:58:29,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 01:58:29,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454229551] [2021-11-06 01:58:29,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454229551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:29,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:29,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 01:58:29,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109395776] [2021-11-06 01:58:29,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:29,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 01:58:29,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 01:58:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 01:58:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 01:58:29,863 INFO L87 Difference]: Start difference. First operand 293 states and 368 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-11-06 01:58:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:29,906 INFO L93 Difference]: Finished difference Result 483 states and 627 transitions. [2021-11-06 01:58:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 01:58:29,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 103 [2021-11-06 01:58:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:29,908 INFO L225 Difference]: With dead ends: 483 [2021-11-06 01:58:29,908 INFO L226 Difference]: Without dead ends: 335 [2021-11-06 01:58:29,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.18ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 01:58:29,910 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 9 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.63ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:29,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 395 Invalid, 72 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 35.63ms Time] [2021-11-06 01:58:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-06 01:58:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 333. [2021-11-06 01:58:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 331 states have (on average 1.2326283987915407) internal successors, (408), 332 states have internal predecessors, (408), 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) [2021-11-06 01:58:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 408 transitions. [2021-11-06 01:58:29,918 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 408 transitions. Word has length 103 [2021-11-06 01:58:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:29,919 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 408 transitions. [2021-11-06 01:58:29,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-11-06 01:58:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 408 transitions. [2021-11-06 01:58:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 01:58:29,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:29,924 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:29,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:30,131 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 [2021-11-06 01:58:30,132 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1973776046, now seen corresponding path program 1 times [2021-11-06 01:58:30,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:30,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355572348] [2021-11-06 01:58:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:30,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:30,143 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 01:58:30,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626129207] [2021-11-06 01:58:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:30,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 01:58:30,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:30,145 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) [2021-11-06 01:58:30,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 01:58:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 01:58:30,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-06 01:58:30,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:30,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355572348] [2021-11-06 01:58:30,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 01:58:30,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626129207] [2021-11-06 01:58:30,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626129207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:30,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:30,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 01:58:30,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722953412] [2021-11-06 01:58:30,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:30,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 01:58:30,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 01:58:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 01:58:30,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 01:58:30,396 INFO L87 Difference]: Start difference. First operand 333 states and 408 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-11-06 01:58:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:30,441 INFO L93 Difference]: Finished difference Result 498 states and 622 transitions. [2021-11-06 01:58:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 01:58:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 103 [2021-11-06 01:58:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:30,442 INFO L225 Difference]: With dead ends: 498 [2021-11-06 01:58:30,442 INFO L226 Difference]: Without dead ends: 310 [2021-11-06 01:58:30,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.23ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 01:58:30,443 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 103 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.94ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:30,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 510 Invalid, 66 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 33.94ms Time] [2021-11-06 01:58:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-06 01:58:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 305. [2021-11-06 01:58:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 303 states have (on average 1.2079207920792079) internal successors, (366), 304 states have internal predecessors, (366), 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) [2021-11-06 01:58:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 366 transitions. [2021-11-06 01:58:30,450 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 366 transitions. Word has length 103 [2021-11-06 01:58:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:30,450 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 366 transitions. [2021-11-06 01:58:30,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-11-06 01:58:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 366 transitions. [2021-11-06 01:58:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 01:58:30,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:30,451 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:30,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:30,669 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 [2021-11-06 01:58:30,669 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1090927200, now seen corresponding path program 1 times [2021-11-06 01:58:30,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:30,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888006083] [2021-11-06 01:58:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:30,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:30,679 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 01:58:30,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849095738] [2021-11-06 01:58:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:30,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 01:58:30,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:30,681 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) [2021-11-06 01:58:30,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 01:58:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:30,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 01:58:30,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:30,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-06 01:58:30,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:30,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888006083] [2021-11-06 01:58:30,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 01:58:30,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849095738] [2021-11-06 01:58:30,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849095738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:30,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:30,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 01:58:30,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821103173] [2021-11-06 01:58:30,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:30,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 01:58:30,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 01:58:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 01:58:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 01:58:30,985 INFO L87 Difference]: Start difference. First operand 305 states and 366 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2021-11-06 01:58:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:31,127 INFO L93 Difference]: Finished difference Result 653 states and 790 transitions. [2021-11-06 01:58:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 01:58:31,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 103 [2021-11-06 01:58:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:31,129 INFO L225 Difference]: With dead ends: 653 [2021-11-06 01:58:31,129 INFO L226 Difference]: Without dead ends: 396 [2021-11-06 01:58:31,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.90ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 01:58:31,130 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 416 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.35ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:31,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 365 Invalid, 77 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 123.35ms Time] [2021-11-06 01:58:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-06 01:58:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 389. [2021-11-06 01:58:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 387 states have (on average 1.2144702842377262) internal successors, (470), 388 states have internal predecessors, (470), 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) [2021-11-06 01:58:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 470 transitions. [2021-11-06 01:58:31,138 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 470 transitions. Word has length 103 [2021-11-06 01:58:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:31,139 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 470 transitions. [2021-11-06 01:58:31,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2021-11-06 01:58:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 470 transitions. [2021-11-06 01:58:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-06 01:58:31,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:31,140 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:31,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:31,355 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 [2021-11-06 01:58:31,355 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:31,356 INFO L85 PathProgramCache]: Analyzing trace with hash 541561274, now seen corresponding path program 1 times [2021-11-06 01:58:31,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 01:58:31,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305367868] [2021-11-06 01:58:31,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:31,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 01:58:31,365 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 01:58:31,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618445594] [2021-11-06 01:58:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:31,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 01:58:31,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:31,367 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) [2021-11-06 01:58:31,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 01:58:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-06 01:58:31,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:31,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-06 01:58:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-06 01:58:31,548 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-06 01:58:31,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-06 01:58:31,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:31,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:31,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2021-11-06 01:58:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 57 [2021-11-06 01:58:32,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-11-06 01:58:32,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 54 [2021-11-06 01:58:32,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-06 01:58:32,483 INFO L354 Elim1Store]: treesize reduction 70, result has 23.1 percent of original size [2021-11-06 01:58:32,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 52 [2021-11-06 01:58:32,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:32,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2021-11-06 01:58:32,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-06 01:58:33,853 INFO L354 Elim1Store]: treesize reduction 364, result has 11.9 percent of original size [2021-11-06 01:58:33,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 2853 treesize of output 2296 [2021-11-06 01:58:33,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:33,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:33,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 01:58:38,890 WARN L230 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 354 DAG size of output: 88 [2021-11-06 01:58:38,891 INFO L354 Elim1Store]: treesize reduction 7776, result has 3.0 percent of original size [2021-11-06 01:58:38,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 3322 treesize of output 1825 [2021-11-06 01:58:38,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 01:58:38,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305367868] [2021-11-06 01:58:38,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 01:58:38,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618445594] [2021-11-06 01:58:38,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-06 01:58:38,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:38,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-06 01:58:38,952 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-06 01:58:38,953 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-06 01:58:38,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-06 01:58:38,964 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-06 01:58:38,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:39,167 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 [2021-11-06 01:58:39,170 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:39,172 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-06 01:58:39,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 01:58:39 BoogieIcfgContainer [2021-11-06 01:58:39,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-06 01:58:39,203 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-06 01:58:39,204 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-06 01:58:39,204 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-06 01:58:39,204 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:58:26" (3/4) ... [2021-11-06 01:58:39,206 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-06 01:58:39,207 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-06 01:58:39,207 INFO L158 Benchmark]: Toolchain (without parser) took 15053.72ms. Allocated memory was 58.7MB in the beginning and 180.4MB in the end (delta: 121.6MB). Free memory was 35.0MB in the beginning and 71.5MB in the end (delta: -36.5MB). Peak memory consumption was 87.0MB. Max. memory is 16.1GB. [2021-11-06 01:58:39,208 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 40.7MB in the beginning and 40.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-06 01:58:39,210 INFO L158 Benchmark]: CACSL2BoogieTranslator took 668.48ms. Allocated memory was 58.7MB in the beginning and 77.6MB in the end (delta: 18.9MB). Free memory was 34.8MB in the beginning and 50.8MB in the end (delta: -16.0MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2021-11-06 01:58:39,210 INFO L158 Benchmark]: Boogie Procedure Inliner took 113.55ms. Allocated memory is still 77.6MB. Free memory was 50.8MB in the beginning and 43.6MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-06 01:58:39,210 INFO L158 Benchmark]: Boogie Preprocessor took 99.04ms. Allocated memory is still 77.6MB. Free memory was 43.3MB in the beginning and 51.9MB in the end (delta: -8.6MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-11-06 01:58:39,210 INFO L158 Benchmark]: RCFGBuilder took 1099.13ms. Allocated memory was 77.6MB in the beginning and 123.7MB in the end (delta: 46.1MB). Free memory was 51.9MB in the beginning and 81.8MB in the end (delta: -29.9MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2021-11-06 01:58:39,211 INFO L158 Benchmark]: TraceAbstraction took 13059.64ms. Allocated memory was 123.7MB in the beginning and 180.4MB in the end (delta: 56.6MB). Free memory was 81.8MB in the beginning and 71.5MB in the end (delta: 10.3MB). Peak memory consumption was 95.5MB. Max. memory is 16.1GB. [2021-11-06 01:58:39,211 INFO L158 Benchmark]: Witness Printer took 3.46ms. Allocated memory is still 180.4MB. Free memory is still 71.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-06 01:58:39,212 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 40.7MB in the beginning and 40.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 668.48ms. Allocated memory was 58.7MB in the beginning and 77.6MB in the end (delta: 18.9MB). Free memory was 34.8MB in the beginning and 50.8MB in the end (delta: -16.0MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 113.55ms. Allocated memory is still 77.6MB. Free memory was 50.8MB in the beginning and 43.6MB in the end (delta: 7.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 99.04ms. Allocated memory is still 77.6MB. Free memory was 43.3MB in the beginning and 51.9MB in the end (delta: -8.6MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * RCFGBuilder took 1099.13ms. Allocated memory was 77.6MB in the beginning and 123.7MB in the end (delta: 46.1MB). Free memory was 51.9MB in the beginning and 81.8MB in the end (delta: -29.9MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. * TraceAbstraction took 13059.64ms. Allocated memory was 123.7MB in the beginning and 180.4MB in the end (delta: 56.6MB). Free memory was 81.8MB in the beginning and 71.5MB in the end (delta: 10.3MB). Peak memory consumption was 95.5MB. Max. memory is 16.1GB. * Witness Printer took 3.46ms. Allocated memory is still 180.4MB. Free memory is still 71.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 730]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint, overapproximation of bitwiseXor at line 725, overapproximation of bitwiseAnd at line 725. Possible FailurePath: [L713] int i; [L714] example_user_t *user, *tmp, *users=((void *)0); [L715] i=0 [L715] EXPR \read(i) [L715] COND TRUE i<1000 [L716] user = (example_user_t*)malloc(sizeof(example_user_t)) [L717] COND FALSE !(user == ((void *)0)) [L720] EXPR \read(i) [L720] user->id = i [L721] EXPR \read(i) [L721] EXPR \read(i) [L721] user->cookie = i*i [L722] unsigned _ha_hashv; [L722] unsigned _hj_i,_hj_j,_hj_k; [L722] unsigned const char *_hj_key=(unsigned const char*)(&((user)->id)); [L722] _ha_hashv = 0xfeedbeefu [L722] EXPR _hj_j = 0x9e3779b9u [L722] _hj_i = _hj_j = 0x9e3779b9u [L722] _hj_k = (unsigned)(sizeof(int)) [L722] COND FALSE !(_hj_k >= 12U) [L722] _ha_hashv += (unsigned)(sizeof(int)) [L722] case 11: [L722] case 10: [L722] case 9: [L722] case 8: [L722] case 7: [L722] case 6: [L722] case 5: [L722] case 4: [L722] EXPR _hj_key[3] [L722] _hj_i += ( (unsigned)_hj_key[3] << 24 ) [L722] case 3: [L722] EXPR _hj_key[2] [L722] _hj_i += ( (unsigned)_hj_key[2] << 16 ) [L722] case 2: [L722] EXPR _hj_key[1] [L722] _hj_i += ( (unsigned)_hj_key[1] << 8 ) [L722] case 1: [L722] EXPR _hj_key[0] [L722] _hj_i += _hj_key[0] [L722] _hj_i -= _hj_j [L722] _hj_i -= _ha_hashv [L722] _hj_i ^= ( _ha_hashv >> 13 ) [L722] _hj_j -= _ha_hashv [L722] _hj_j -= _hj_i [L722] _hj_j ^= ( _hj_i << 8 ) [L722] _ha_hashv -= _hj_i [L722] _ha_hashv -= _hj_j [L722] _ha_hashv ^= ( _hj_j >> 13 ) [L722] _hj_i -= _hj_j [L722] _hj_i -= _ha_hashv [L722] _hj_i ^= ( _ha_hashv >> 12 ) [L722] _hj_j -= _ha_hashv [L722] _hj_j -= _hj_i [L722] _hj_j ^= ( _hj_i << 16 ) [L722] _ha_hashv -= _hj_i [L722] _ha_hashv -= _hj_j [L722] _ha_hashv ^= ( _hj_j >> 5 ) [L722] _hj_i -= _hj_j [L722] _hj_i -= _ha_hashv [L722] _hj_i ^= ( _ha_hashv >> 3 ) [L722] _hj_j -= _ha_hashv [L722] _hj_j -= _hj_i [L722] _hj_j ^= ( _hj_i << 10 ) [L722] _ha_hashv -= _hj_i [L722] _ha_hashv -= _hj_j [L722] _ha_hashv ^= ( _hj_j >> 15 ) [L722] (user)->hh.hashv = (_ha_hashv) [L722] (user)->hh.key = (char*) (&((user)->id)) [L722] (user)->hh.keylen = (unsigned) (sizeof(int)) [L722] COND TRUE !(users) [L722] (user)->hh.next = ((void *)0) [L722] (user)->hh.prev = ((void *)0) [L722] (user)->hh.tbl = (UT_hash_table*)malloc(sizeof(UT_hash_table)) [L722] EXPR (user)->hh.tbl [L722] COND FALSE !(!(user)->hh.tbl) [L722] (user)->hh.tbl [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->tail = &((user)->hh) [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->num_buckets = 32U [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->log2_num_buckets = 5U [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->hho = (char*)(&(user)->hh) - (char*)(user) [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->buckets = (UT_hash_bucket*)malloc(32U * sizeof(struct UT_hash_bucket)) [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->signature = 0xa0111fe1u [L722] EXPR (user)->hh.tbl [L722] EXPR (user)->hh.tbl->buckets [L722] COND FALSE !(!(user)->hh.tbl->buckets) [L722] EXPR (user)->hh.tbl [L722] (user)->hh.tbl->buckets [L722] (users) = (user) [L722] unsigned _ha_bkt; [L722] EXPR (users)->hh.tbl [L722] EXPR (users)->hh.tbl->num_items [L722] (users)->hh.tbl->num_items++ [L722] EXPR (users)->hh.tbl [L722] EXPR (users)->hh.tbl->num_buckets [L722] _ha_bkt = ((_ha_hashv) & (((users)->hh.tbl->num_buckets) - 1U)) [L722] EXPR (users)->hh.tbl [L722] EXPR (users)->hh.tbl->buckets [L722] UT_hash_bucket *_ha_head = &((users)->hh.tbl->buckets[_ha_bkt]); [L722] EXPR _ha_head->count [L722] _ha_head->count++ [L722] EXPR _ha_head->hh_head [L722] (&(user)->hh)->hh_next = _ha_head->hh_head [L722] (&(user)->hh)->hh_prev = ((void *)0) [L722] EXPR _ha_head->hh_head [L722] COND FALSE !(_ha_head->hh_head != ((void *)0)) [L722] _ha_head->hh_head = (&(user)->hh) [L722] EXPR _ha_head->count [L722] EXPR _ha_head->expand_mult [L722] (_ha_head->count >= ((_ha_head->expand_mult + 1U) * 10U)) && !(&(user)->hh)->tbl->noexpand [L722] EXPR (&(user)->hh)->tbl [L722] EXPR (&(user)->hh)->tbl->noexpand [L722] (_ha_head->count >= ((_ha_head->expand_mult + 1U) * 10U)) && !(&(user)->hh)->tbl->noexpand [L722] COND FALSE !((_ha_head->count >= ((_ha_head->expand_mult + 1U) * 10U)) && !(&(user)->hh)->tbl->noexpand) [L715] EXPR \read(i) [L715] i++ [L715] EXPR \read(i) [L715] COND FALSE !(i<1000) [L724] i=0 [L724] EXPR \read(i) [L724] COND TRUE i<1000 [L725] unsigned _hf_hashv; [L725] unsigned _hj_i,_hj_j,_hj_k; [L725] unsigned const char *_hj_key=(unsigned const char*)(&i); [L725] _hf_hashv = 0xfeedbeefu [L725] EXPR _hj_j = 0x9e3779b9u [L725] _hj_i = _hj_j = 0x9e3779b9u [L725] _hj_k = (unsigned)(sizeof(int)) [L725] COND FALSE !(_hj_k >= 12U) [L725] _hf_hashv += (unsigned)(sizeof(int)) [L725] case 11: [L725] case 10: [L725] case 9: [L725] case 8: [L725] case 7: [L725] case 6: [L725] case 5: [L725] case 4: [L725] EXPR _hj_key[3] [L725] _hj_i += ( (unsigned)_hj_key[3] << 24 ) [L725] case 3: [L725] EXPR _hj_key[2] [L725] _hj_i += ( (unsigned)_hj_key[2] << 16 ) [L725] case 2: [L725] EXPR _hj_key[1] [L725] _hj_i += ( (unsigned)_hj_key[1] << 8 ) [L725] case 1: [L725] EXPR _hj_key[0] [L725] _hj_i += _hj_key[0] [L725] _hj_i -= _hj_j [L725] _hj_i -= _hf_hashv [L725] _hj_i ^= ( _hf_hashv >> 13 ) [L725] _hj_j -= _hf_hashv [L725] _hj_j -= _hj_i [L725] _hj_j ^= ( _hj_i << 8 ) [L725] _hf_hashv -= _hj_i [L725] _hf_hashv -= _hj_j [L725] _hf_hashv ^= ( _hj_j >> 13 ) [L725] _hj_i -= _hj_j [L725] _hj_i -= _hf_hashv [L725] _hj_i ^= ( _hf_hashv >> 12 ) [L725] _hj_j -= _hf_hashv [L725] _hj_j -= _hj_i [L725] _hj_j ^= ( _hj_i << 16 ) [L725] _hf_hashv -= _hj_i [L725] _hf_hashv -= _hj_j [L725] _hf_hashv ^= ( _hj_j >> 5 ) [L725] _hj_i -= _hj_j [L725] _hj_i -= _hf_hashv [L725] _hj_i ^= ( _hf_hashv >> 3 ) [L725] _hj_j -= _hf_hashv [L725] _hj_j -= _hj_i [L725] _hj_j ^= ( _hj_i << 10 ) [L725] _hf_hashv -= _hj_i [L725] _hf_hashv -= _hj_j [L725] _hf_hashv ^= ( _hj_j >> 15 ) [L725] (tmp) = ((void *)0) [L725] COND TRUE \read(*users) [L725] unsigned _hf_bkt; [L725] EXPR (users)->hh.tbl [L725] EXPR (users)->hh.tbl->num_buckets [L725] _hf_bkt = ((_hf_hashv) & (((users)->hh.tbl->num_buckets) - 1U)) [L725] EXPR (users)->hh.tbl [L725] EXPR (users)->hh.tbl->buckets [L725] EXPR ((users)->hh.tbl->buckets[ _hf_bkt ]).hh_head [L725] COND FALSE !(((users)->hh.tbl->buckets[ _hf_bkt ]).hh_head != ((void *)0)) [L725] (tmp) = ((void *)0) [L725] COND FALSE !((tmp) != ((void *)0)) [L726] COND FALSE !(tmp != ((void *)0)) [L730] reach_error() - UnprovableResult [Line: 734]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 211 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 12993.02ms, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 32.53ms, AutomataDifference: 1130.41ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 9.34ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1143 SdHoareTripleChecker+Valid, 894.52ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1143 mSDsluCounter, 3966 SdHoareTripleChecker+Invalid, 744.13ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1958 mSDsCounter, 119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 561 IncrementalHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 119 mSolverCounterUnsat, 2008 mSDtfsCounter, 561 mSolverCounterSat, 19.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.96ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=389occurred in iteration=9, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 88.68ms AutomataMinimizationTime, 9 MinimizatonAttempts, 226 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 344.62ms SsaConstructionTime, 326.06ms SatisfiabilityAnalysisTime, 8663.71ms InterpolantComputationTime, 692 NumberOfCodeBlocks, 692 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 573 ConstructedInterpolants, 0 QuantifiedInterpolants, 1106 SizeOfPredicates, 6 NumberOfNonLiveVariables, 2243 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-06 01:58:39,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/uthash-2.0.2/uthash_SAX_test7-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-06 01:58:40,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 01:58:40,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 01:58:40,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 01:58:40,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 01:58:40,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 01:58:40,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 01:58:40,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 01:58:40,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 01:58:40,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 01:58:40,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 01:58:40,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 01:58:40,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 01:58:40,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 01:58:40,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 01:58:40,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 01:58:40,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 01:58:40,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 01:58:40,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 01:58:40,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 01:58:40,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 01:58:40,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 01:58:40,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 01:58:40,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 01:58:40,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 01:58:40,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 01:58:40,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 01:58:40,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 01:58:40,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 01:58:40,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 01:58:40,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 01:58:40,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 01:58:40,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 01:58:40,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 01:58:40,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 01:58:40,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 01:58:40,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 01:58:40,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 01:58:40,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 01:58:40,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 01:58:40,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 01:58:40,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-06 01:58:40,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 01:58:40,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 01:58:40,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 01:58:40,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 01:58:40,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 01:58:40,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 01:58:40,996 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 01:58:40,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 01:58:40,997 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-06 01:58:40,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-06 01:58:40,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 01:58:40,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 01:58:40,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 01:58:40,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 01:58:40,998 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-06 01:58:40,998 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-06 01:58:40,998 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-06 01:58:40,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 01:58:40,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 01:58:40,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 01:58:40,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 01:58:40,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 01:58:40,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 01:58:40,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 01:58:40,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 01:58:40,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 01:58:41,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 01:58:41,000 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-06 01:58:41,000 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-06 01:58:41,000 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 01:58:41,000 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 01:58:41,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 01:58:41,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 01:58:41,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-06 01:58:41,001 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f [2021-11-06 01:58:41,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 01:58:41,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 01:58:41,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 01:58:41,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 01:58:41,272 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 01:58:41,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2021-11-06 01:58:41,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c0e2e13/33aa2e5a1df04f68b58ec01f80fe2ecd/FLAG028c52010 [2021-11-06 01:58:41,744 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 01:58:41,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2021-11-06 01:58:41,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c0e2e13/33aa2e5a1df04f68b58ec01f80fe2ecd/FLAG028c52010 [2021-11-06 01:58:41,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c0e2e13/33aa2e5a1df04f68b58ec01f80fe2ecd [2021-11-06 01:58:41,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 01:58:41,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 01:58:41,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 01:58:41,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 01:58:41,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 01:58:41,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:58:41" (1/1) ... [2021-11-06 01:58:41,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520d9701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:41, skipping insertion in model container [2021-11-06 01:58:41,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:58:41" (1/1) ... [2021-11-06 01:58:41,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 01:58:41,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 01:58:42,063 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2021-11-06 01:58:42,166 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2021-11-06 01:58:42,167 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2021-11-06 01:58:42,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 01:58:42,192 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 01:58:42,210 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2021-11-06 01:58:42,254 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2021-11-06 01:58:42,255 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2021-11-06 01:58:42,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 01:58:42,292 INFO L208 MainTranslator]: Completed translation [2021-11-06 01:58:42,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42 WrapperNode [2021-11-06 01:58:42,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 01:58:42,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 01:58:42,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 01:58:42,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 01:58:42,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 01:58:42,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 01:58:42,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 01:58:42,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 01:58:42,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 01:58:42,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 01:58:42,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 01:58:42,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 01:58:42,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (1/1) ... [2021-11-06 01:58:42,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 01:58:42,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 01:58:42,497 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) [2021-11-06 01:58:42,503 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 [2021-11-06 01:58:42,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-06 01:58:42,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-06 01:58:42,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 01:58:42,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 01:58:42,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 01:58:42,526 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-06 01:58:42,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 01:58:42,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 01:58:42,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-06 01:58:42,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-06 01:58:42,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 01:58:42,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 01:58:46,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 01:58:46,810 INFO L299 CfgBuilder]: Removed 82 assume(true) statements. [2021-11-06 01:58:46,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:58:46 BoogieIcfgContainer [2021-11-06 01:58:46,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 01:58:46,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 01:58:46,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 01:58:46,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 01:58:46,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 01:58:41" (1/3) ... [2021-11-06 01:58:46,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265045a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:58:46, skipping insertion in model container [2021-11-06 01:58:46,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:58:42" (2/3) ... [2021-11-06 01:58:46,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265045a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:58:46, skipping insertion in model container [2021-11-06 01:58:46,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:58:46" (3/3) ... [2021-11-06 01:58:46,820 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test7-2.i [2021-11-06 01:58:46,824 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 01:58:46,824 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-06 01:58:46,857 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 01:58:46,865 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 [2021-11-06 01:58:46,865 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-06 01:58:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 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) [2021-11-06 01:58:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-06 01:58:46,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:46,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:46,892 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:46,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1366407864, now seen corresponding path program 1 times [2021-11-06 01:58:46,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:58:46,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358186349] [2021-11-06 01:58:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:46,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:58:46,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:58:46,912 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:58:46,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-06 01:58:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-06 01:58:47,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:47,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:58:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:47,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:58:47,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358186349] [2021-11-06 01:58:47,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358186349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:47,132 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:47,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-06 01:58:47,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093997009] [2021-11-06 01:58:47,135 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:47,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 01:58:47,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:58:47,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 01:58:47,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 01:58:47,168 INFO L87 Difference]: Start difference. First operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-06 01:58:47,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:47,214 INFO L93 Difference]: Finished difference Result 419 states and 707 transitions. [2021-11-06 01:58:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 01:58:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 [2021-11-06 01:58:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:47,242 INFO L225 Difference]: With dead ends: 419 [2021-11-06 01:58:47,243 INFO L226 Difference]: Without dead ends: 177 [2021-11-06 01:58:47,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.09ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 01:58:47,249 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:47,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 3.93ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-06 01:58:47,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-06 01:58:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-06 01:58:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 176 states have internal predecessors, (232), 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) [2021-11-06 01:58:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2021-11-06 01:58:47,283 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 8 [2021-11-06 01:58:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:47,284 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2021-11-06 01:58:47,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-06 01:58:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2021-11-06 01:58:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-06 01:58:47,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:47,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:47,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:47,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:58:47,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:47,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1136278917, now seen corresponding path program 1 times [2021-11-06 01:58:47,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:58:47,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003576572] [2021-11-06 01:58:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:47,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:58:47,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:58:47,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:58:47,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-06 01:58:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:47,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:47,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:47,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-06 01:58:47,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-06 01:58:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:47,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:58:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:47,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:58:47,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003576572] [2021-11-06 01:58:47,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003576572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:47,746 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:47,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-06 01:58:47,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35286522] [2021-11-06 01:58:47,746 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:47,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 01:58:47,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:58:47,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 01:58:47,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 01:58:47,751 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2021-11-06 01:58:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:49,870 INFO L93 Difference]: Finished difference Result 468 states and 614 transitions. [2021-11-06 01:58:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 01:58:49,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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 10 [2021-11-06 01:58:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:49,874 INFO L225 Difference]: With dead ends: 468 [2021-11-06 01:58:49,874 INFO L226 Difference]: Without dead ends: 381 [2021-11-06 01:58:49,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.71ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 01:58:49,876 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 396 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1866.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.85ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2071.65ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:49,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 652 Invalid, 206 Unknown, 0 Unchecked, 7.85ms Time], IncrementalHoareTripleChecker [8 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 2071.65ms Time] [2021-11-06 01:58:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-06 01:58:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 179. [2021-11-06 01:58:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.3220338983050848) internal successors, (234), 178 states have internal predecessors, (234), 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) [2021-11-06 01:58:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 234 transitions. [2021-11-06 01:58:49,887 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 234 transitions. Word has length 10 [2021-11-06 01:58:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:49,887 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 234 transitions. [2021-11-06 01:58:49,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2021-11-06 01:58:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 234 transitions. [2021-11-06 01:58:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 01:58:49,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:49,889 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:49,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:50,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:58:50,097 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2095912151, now seen corresponding path program 1 times [2021-11-06 01:58:50,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:58:50,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556690269] [2021-11-06 01:58:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:50,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:58:50,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:58:50,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:58:50,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-06 01:58:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:50,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:50,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:58:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:50,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:58:50,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556690269] [2021-11-06 01:58:50,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556690269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:50,540 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:50,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-06 01:58:50,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891952272] [2021-11-06 01:58:50,541 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:50,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 01:58:50,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:58:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 01:58:50,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 01:58:50,541 INFO L87 Difference]: Start difference. First operand 179 states and 234 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 01:58:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:50,633 INFO L93 Difference]: Finished difference Result 363 states and 476 transitions. [2021-11-06 01:58:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 01:58:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-06 01:58:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:50,634 INFO L225 Difference]: With dead ends: 363 [2021-11-06 01:58:50,634 INFO L226 Difference]: Without dead ends: 188 [2021-11-06 01:58:50,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.34ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-06 01:58:50,636 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 217 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.01ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:50,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 423 Invalid, 69 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 77.01ms Time] [2021-11-06 01:58:50,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-06 01:58:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2021-11-06 01:58:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.2722222222222221) internal successors, (229), 181 states have internal predecessors, (229), 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) [2021-11-06 01:58:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 229 transitions. [2021-11-06 01:58:50,642 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 229 transitions. Word has length 62 [2021-11-06 01:58:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:50,643 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 229 transitions. [2021-11-06 01:58:50,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 01:58:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 229 transitions. [2021-11-06 01:58:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 01:58:50,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:50,644 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:50,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:50,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:58:50,858 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1777715509, now seen corresponding path program 1 times [2021-11-06 01:58:50,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:58:50,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386605539] [2021-11-06 01:58:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:50,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:58:50,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:58:50,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:58:50,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-06 01:58:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:51,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:51,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:51,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:58:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:51,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:58:51,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386605539] [2021-11-06 01:58:51,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386605539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:51,629 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:51,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-06 01:58:51,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572320543] [2021-11-06 01:58:51,629 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:51,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 01:58:51,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:58:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 01:58:51,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 01:58:51,630 INFO L87 Difference]: Start difference. First operand 182 states and 229 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-06 01:58:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:52,469 INFO L93 Difference]: Finished difference Result 470 states and 590 transitions. [2021-11-06 01:58:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 01:58:52,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-11-06 01:58:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:52,470 INFO L225 Difference]: With dead ends: 470 [2021-11-06 01:58:52,470 INFO L226 Difference]: Without dead ends: 292 [2021-11-06 01:58:52,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.49ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 01:58:52,472 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 101 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 778.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 825.44ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:52,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 451 Invalid, 36 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 825.44ms Time] [2021-11-06 01:58:52,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-06 01:58:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2021-11-06 01:58:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 283 states have (on average 1.265017667844523) internal successors, (358), 284 states have internal predecessors, (358), 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) [2021-11-06 01:58:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 358 transitions. [2021-11-06 01:58:52,491 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 358 transitions. Word has length 62 [2021-11-06 01:58:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:52,492 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 358 transitions. [2021-11-06 01:58:52,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-06 01:58:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 358 transitions. [2021-11-06 01:58:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-06 01:58:52,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:52,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:52,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:52,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:58:52,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:52,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1300403396, now seen corresponding path program 1 times [2021-11-06 01:58:52,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:58:52,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287651438] [2021-11-06 01:58:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:52,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:58:52,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:58:52,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:58:52,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-06 01:58:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:52,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:52,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:53,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:58:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 01:58:53,107 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:58:53,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287651438] [2021-11-06 01:58:53,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287651438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:53,107 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:53,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-06 01:58:53,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632240494] [2021-11-06 01:58:53,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:53,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 01:58:53,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:58:53,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 01:58:53,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 01:58:53,108 INFO L87 Difference]: Start difference. First operand 285 states and 358 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-11-06 01:58:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:53,161 INFO L93 Difference]: Finished difference Result 528 states and 673 transitions. [2021-11-06 01:58:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 01:58:53,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 69 [2021-11-06 01:58:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:53,163 INFO L225 Difference]: With dead ends: 528 [2021-11-06 01:58:53,163 INFO L226 Difference]: Without dead ends: 288 [2021-11-06 01:58:53,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.14ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 01:58:53,164 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 0 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.75ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.65ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:53,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 431 Invalid, 14 Unknown, 0 Unchecked, 0.75ms Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 45.65ms Time] [2021-11-06 01:58:53,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-06 01:58:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-06 01:58:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 286 states have (on average 1.2622377622377623) internal successors, (361), 287 states have internal predecessors, (361), 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) [2021-11-06 01:58:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 361 transitions. [2021-11-06 01:58:53,171 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 361 transitions. Word has length 69 [2021-11-06 01:58:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:53,171 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 361 transitions. [2021-11-06 01:58:53,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-11-06 01:58:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 361 transitions. [2021-11-06 01:58:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-06 01:58:53,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:53,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:53,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-06 01:58:53,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:58:53,387 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash 982130832, now seen corresponding path program 1 times [2021-11-06 01:58:53,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:58:53,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104732812] [2021-11-06 01:58:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:53,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:58:53,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:58:53,391 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:58:53,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-06 01:58:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:58:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 01:58:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 01:58:53,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:58:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 01:58:53,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:58:53,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104732812] [2021-11-06 01:58:53,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104732812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 01:58:53,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 01:58:53,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-06 01:58:53,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032550440] [2021-11-06 01:58:53,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-06 01:58:53,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 01:58:53,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:58:53,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 01:58:53,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 01:58:53,877 INFO L87 Difference]: Start difference. First operand 288 states and 361 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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) [2021-11-06 01:58:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:54,119 INFO L93 Difference]: Finished difference Result 537 states and 685 transitions. [2021-11-06 01:58:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 01:58:54,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 72 [2021-11-06 01:58:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:54,125 INFO L225 Difference]: With dead ends: 537 [2021-11-06 01:58:54,125 INFO L226 Difference]: Without dead ends: 294 [2021-11-06 01:58:54,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 151.52ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-06 01:58:54,126 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 0 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.57ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.15ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:54,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 855 Invalid, 50 Unknown, 0 Unchecked, 1.57ms Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 157.15ms Time] [2021-11-06 01:58:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-06 01:58:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2021-11-06 01:58:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 292 states have (on average 1.2568493150684932) internal successors, (367), 293 states have internal predecessors, (367), 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) [2021-11-06 01:58:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 367 transitions. [2021-11-06 01:58:54,133 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 367 transitions. Word has length 72 [2021-11-06 01:58:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:54,133 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 367 transitions. [2021-11-06 01:58:54,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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) [2021-11-06 01:58:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 367 transitions. [2021-11-06 01:58:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-06 01:58:54,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:54,135 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:54,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:54,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:58:54,347 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2058438736, now seen corresponding path program 2 times [2021-11-06 01:58:54,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:58:54,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906257209] [2021-11-06 01:58:54,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 01:58:54,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:58:54,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:58:54,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:58:54,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-06 01:58:54,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 01:58:54,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 01:58:54,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:58:54,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:58:54,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-06 01:58:54,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-06 01:58:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-06 01:58:54,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:58:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-06 01:58:54,675 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:58:54,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906257209] [2021-11-06 01:58:54,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906257209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 01:58:54,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:58:54,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-06 01:58:54,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618762432] [2021-11-06 01:58:54,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-06 01:58:54,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 01:58:54,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:58:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 01:58:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 01:58:54,677 INFO L87 Difference]: Start difference. First operand 294 states and 367 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2021-11-06 01:58:56,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-06 01:58:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:58:59,574 INFO L93 Difference]: Finished difference Result 448 states and 571 transitions. [2021-11-06 01:58:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 01:58:59,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 78 [2021-11-06 01:58:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:58:59,577 INFO L225 Difference]: With dead ends: 448 [2021-11-06 01:58:59,577 INFO L226 Difference]: Without dead ends: 444 [2021-11-06 01:58:59,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.54ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 01:58:59,577 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 207 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4613.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.54ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4847.46ms IncrementalHoareTripleChecker+Time [2021-11-06 01:58:59,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 927 Invalid, 273 Unknown, 0 Unchecked, 5.54ms Time], IncrementalHoareTripleChecker [6 Valid, 266 Invalid, 1 Unknown, 0 Unchecked, 4847.46ms Time] [2021-11-06 01:58:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-06 01:58:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 365. [2021-11-06 01:58:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 363 states have (on average 1.2754820936639117) internal successors, (463), 364 states have internal predecessors, (463), 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) [2021-11-06 01:58:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 463 transitions. [2021-11-06 01:58:59,587 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 463 transitions. Word has length 78 [2021-11-06 01:58:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:58:59,587 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 463 transitions. [2021-11-06 01:58:59,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2021-11-06 01:58:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 463 transitions. [2021-11-06 01:58:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-06 01:58:59,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:58:59,589 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:58:59,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-06 01:58:59,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:58:59,791 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:58:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:58:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1224331210, now seen corresponding path program 1 times [2021-11-06 01:58:59,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:58:59,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32860300] [2021-11-06 01:58:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:58:59,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:58:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:58:59,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:58:59,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-06 01:58:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:59:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 01:59:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:59:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 01:59:00,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:59:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 01:59:00,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:59:00,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32860300] [2021-11-06 01:59:00,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32860300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 01:59:00,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 01:59:00,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-06 01:59:00,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47751911] [2021-11-06 01:59:00,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-06 01:59:00,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 01:59:00,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:59:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 01:59:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-06 01:59:00,743 INFO L87 Difference]: Start difference. First operand 365 states and 463 transitions. Second operand has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 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) [2021-11-06 01:59:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:59:02,221 INFO L93 Difference]: Finished difference Result 697 states and 901 transitions. [2021-11-06 01:59:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 01:59:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 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 112 [2021-11-06 01:59:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:59:02,223 INFO L225 Difference]: With dead ends: 697 [2021-11-06 01:59:02,223 INFO L226 Difference]: Without dead ends: 377 [2021-11-06 01:59:02,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 825.50ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-06 01:59:02,225 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 0 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 892.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 950.97ms IncrementalHoareTripleChecker+Time [2021-11-06 01:59:02,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1703 Invalid, 158 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 950.97ms Time] [2021-11-06 01:59:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-06 01:59:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-11-06 01:59:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 375 states have (on average 1.2666666666666666) internal successors, (475), 376 states have internal predecessors, (475), 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) [2021-11-06 01:59:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 475 transitions. [2021-11-06 01:59:02,233 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 475 transitions. Word has length 112 [2021-11-06 01:59:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:59:02,233 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 475 transitions. [2021-11-06 01:59:02,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 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) [2021-11-06 01:59:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 475 transitions. [2021-11-06 01:59:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-06 01:59:02,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:59:02,235 INFO L514 BasicCegarLoop]: trace histogram [14, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:59:02,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-06 01:59:02,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:59:02,449 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:59:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:59:02,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2016870474, now seen corresponding path program 2 times [2021-11-06 01:59:02,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:59:02,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648372287] [2021-11-06 01:59:02,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 01:59:02,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:59:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:59:02,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:59:02,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-06 01:59:02,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 01:59:02,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 01:59:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 01:59:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:59:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-06 01:59:02,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:59:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-06 01:59:02,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:59:02,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648372287] [2021-11-06 01:59:02,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648372287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 01:59:02,886 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:59:02,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-06 01:59:02,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803123701] [2021-11-06 01:59:02,886 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-06 01:59:02,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 01:59:02,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:59:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 01:59:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 01:59:02,887 INFO L87 Difference]: Start difference. First operand 377 states and 475 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2021-11-06 01:59:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:59:02,977 INFO L93 Difference]: Finished difference Result 603 states and 784 transitions. [2021-11-06 01:59:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 01:59:02,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 124 [2021-11-06 01:59:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:59:02,981 INFO L225 Difference]: With dead ends: 603 [2021-11-06 01:59:02,981 INFO L226 Difference]: Without dead ends: 389 [2021-11-06 01:59:02,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.93ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-06 01:59:02,983 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 101 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.89ms IncrementalHoareTripleChecker+Time [2021-11-06 01:59:02,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 604 Invalid, 68 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 75.89ms Time] [2021-11-06 01:59:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-06 01:59:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 386. [2021-11-06 01:59:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 384 states have (on average 1.1979166666666667) internal successors, (460), 385 states have internal predecessors, (460), 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) [2021-11-06 01:59:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 460 transitions. [2021-11-06 01:59:02,993 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 460 transitions. Word has length 124 [2021-11-06 01:59:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:59:02,994 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 460 transitions. [2021-11-06 01:59:02,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2021-11-06 01:59:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 460 transitions. [2021-11-06 01:59:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-06 01:59:02,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:59:02,995 INFO L514 BasicCegarLoop]: trace histogram [14, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:59:03,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-06 01:59:03,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:59:03,204 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:59:03,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:59:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1333208362, now seen corresponding path program 1 times [2021-11-06 01:59:03,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:59:03,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022279427] [2021-11-06 01:59:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:59:03,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:59:03,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:59:03,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:59:03,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-06 01:59:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:59:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 01:59:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:59:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-06 01:59:03,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:59:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-06 01:59:05,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:59:05,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022279427] [2021-11-06 01:59:05,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022279427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 01:59:05,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 01:59:05,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-06 01:59:05,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831496349] [2021-11-06 01:59:05,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-06 01:59:05,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-06 01:59:05,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:59:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-06 01:59:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-06 01:59:05,084 INFO L87 Difference]: Start difference. First operand 386 states and 460 transitions. Second operand has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 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) [2021-11-06 01:59:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:59:15,064 INFO L93 Difference]: Finished difference Result 751 states and 919 transitions. [2021-11-06 01:59:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-06 01:59:15,072 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 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 124 [2021-11-06 01:59:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:59:15,073 INFO L225 Difference]: With dead ends: 751 [2021-11-06 01:59:15,073 INFO L226 Difference]: Without dead ends: 410 [2021-11-06 01:59:15,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4935.14ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-06 01:59:15,075 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 0 mSDsluCounter, 3618 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5878.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3826 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.40ms SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6104.42ms IncrementalHoareTripleChecker+Time [2021-11-06 01:59:15,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3826 Invalid, 536 Unknown, 0 Unchecked, 5.40ms Time], IncrementalHoareTripleChecker [157 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 6104.42ms Time] [2021-11-06 01:59:15,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-06 01:59:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-06 01:59:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 408 states have (on average 1.1862745098039216) internal successors, (484), 409 states have internal predecessors, (484), 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) [2021-11-06 01:59:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 484 transitions. [2021-11-06 01:59:15,086 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 484 transitions. Word has length 124 [2021-11-06 01:59:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:59:15,086 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 484 transitions. [2021-11-06 01:59:15,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 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) [2021-11-06 01:59:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 484 transitions. [2021-11-06 01:59:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 01:59:15,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:59:15,088 INFO L514 BasicCegarLoop]: trace histogram [30, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:59:15,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-06 01:59:15,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:59:15,300 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:59:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:59:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2039593942, now seen corresponding path program 2 times [2021-11-06 01:59:15,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:59:15,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712732184] [2021-11-06 01:59:15,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 01:59:15,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:59:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:59:15,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:59:15,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-06 01:59:15,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 01:59:15,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 01:59:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 01:59:15,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:59:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-06 01:59:15,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:59:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-06 01:59:15,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:59:15,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712732184] [2021-11-06 01:59:15,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712732184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 01:59:15,813 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 01:59:15,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 5 [2021-11-06 01:59:15,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185613150] [2021-11-06 01:59:15,813 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-06 01:59:15,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 01:59:15,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:59:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 01:59:15,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 01:59:15,814 INFO L87 Difference]: Start difference. First operand 410 states and 484 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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) [2021-11-06 01:59:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 01:59:15,901 INFO L93 Difference]: Finished difference Result 611 states and 731 transitions. [2021-11-06 01:59:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 01:59:15,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 148 [2021-11-06 01:59:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 01:59:15,903 INFO L225 Difference]: With dead ends: 611 [2021-11-06 01:59:15,903 INFO L226 Difference]: Without dead ends: 413 [2021-11-06 01:59:15,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.10ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 01:59:15,904 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 3 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.21ms IncrementalHoareTripleChecker+Time [2021-11-06 01:59:15,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 746 Invalid, 88 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 70.21ms Time] [2021-11-06 01:59:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-06 01:59:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2021-11-06 01:59:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 408 states have (on average 1.1642156862745099) internal successors, (475), 409 states have internal predecessors, (475), 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) [2021-11-06 01:59:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 475 transitions. [2021-11-06 01:59:15,914 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 475 transitions. Word has length 148 [2021-11-06 01:59:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 01:59:15,915 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 475 transitions. [2021-11-06 01:59:15,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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) [2021-11-06 01:59:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 475 transitions. [2021-11-06 01:59:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 01:59:15,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 01:59:15,916 INFO L514 BasicCegarLoop]: trace histogram [30, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 01:59:15,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-06 01:59:16,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 01:59:16,124 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 01:59:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 01:59:16,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1997207916, now seen corresponding path program 1 times [2021-11-06 01:59:16,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 01:59:16,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64344238] [2021-11-06 01:59:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 01:59:16,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 01:59:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 01:59:16,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 01:59:16,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-06 01:59:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 01:59:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-06 01:59:16,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 01:59:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 2 proven. 465 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-06 01:59:17,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 01:59:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 2 proven. 465 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-06 01:59:20,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 01:59:20,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64344238] [2021-11-06 01:59:20,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64344238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 01:59:20,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 01:59:20,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2021-11-06 01:59:20,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982535104] [2021-11-06 01:59:20,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-06 01:59:20,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-06 01:59:20,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 01:59:20,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-06 01:59:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=3099, Unknown=0, NotChecked=0, Total=4032 [2021-11-06 01:59:20,239 INFO L87 Difference]: Start difference. First operand 410 states and 475 transitions. Second operand has 64 states, 64 states have (on average 2.59375) internal successors, (166), 64 states have internal predecessors, (166), 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) [2021-11-06 02:00:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 02:00:28,561 INFO L93 Difference]: Finished difference Result 805 states and 961 transitions. [2021-11-06 02:00:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-06 02:00:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.59375) internal successors, (166), 64 states have internal predecessors, (166), 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 148 [2021-11-06 02:00:28,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 02:00:28,564 INFO L225 Difference]: With dead ends: 805 [2021-11-06 02:00:28,564 INFO L226 Difference]: Without dead ends: 440 [2021-11-06 02:00:28,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 27449.38ms TimeCoverageRelationStatistics Valid=2700, Invalid=6042, Unknown=0, NotChecked=0, Total=8742 [2021-11-06 02:00:28,567 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 0 mSDsluCounter, 7035 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43205.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7243 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.91ms SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43932.83ms IncrementalHoareTripleChecker+Time [2021-11-06 02:00:28,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7243 Invalid, 1673 Unknown, 0 Unchecked, 14.91ms Time], IncrementalHoareTripleChecker [555 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 43932.83ms Time] [2021-11-06 02:00:28,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-06 02:00:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-11-06 02:00:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 438 states have (on average 1.1529680365296804) internal successors, (505), 439 states have internal predecessors, (505), 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) [2021-11-06 02:00:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 505 transitions. [2021-11-06 02:00:28,581 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 505 transitions. Word has length 148 [2021-11-06 02:00:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 02:00:28,581 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 505 transitions. [2021-11-06 02:00:28,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.59375) internal successors, (166), 64 states have internal predecessors, (166), 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) [2021-11-06 02:00:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 505 transitions. [2021-11-06 02:00:28,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-06 02:00:28,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 02:00:28,583 INFO L514 BasicCegarLoop]: trace histogram [44, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 02:00:28,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-06 02:00:28,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 02:00:28,794 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 02:00:28,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 02:00:28,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1100843980, now seen corresponding path program 2 times [2021-11-06 02:00:28,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 02:00:28,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438178346] [2021-11-06 02:00:28,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 02:00:28,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 02:00:28,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 02:00:28,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 02:00:28,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-06 02:00:29,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 02:00:29,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 02:00:29,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 02:00:29,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 02:00:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 2 proven. 496 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-06 02:00:30,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 02:00:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 2 proven. 496 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-06 02:00:34,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 02:00:34,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438178346] [2021-11-06 02:00:34,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438178346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 02:00:34,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 02:00:34,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-06 02:00:34,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494072049] [2021-11-06 02:00:34,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-06 02:00:34,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-06 02:00:34,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 02:00:34,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-06 02:00:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2021-11-06 02:00:34,297 INFO L87 Difference]: Start difference. First operand 440 states and 505 transitions. Second operand has 66 states, 66 states have (on average 2.5454545454545454) internal successors, (168), 66 states have internal predecessors, (168), 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) [2021-11-06 02:01:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 02:01:49,979 INFO L93 Difference]: Finished difference Result 868 states and 1027 transitions. [2021-11-06 02:01:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-06 02:01:49,980 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.5454545454545454) internal successors, (168), 66 states have internal predecessors, (168), 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 178 [2021-11-06 02:01:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 02:01:49,982 INFO L225 Difference]: With dead ends: 868 [2021-11-06 02:01:49,982 INFO L226 Difference]: Without dead ends: 473 [2021-11-06 02:01:49,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 31578.14ms TimeCoverageRelationStatistics Valid=3199, Invalid=6113, Unknown=0, NotChecked=0, Total=9312 [2021-11-06 02:01:49,984 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 0 mSDsluCounter, 7035 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47033.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7243 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.27ms SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47936.15ms IncrementalHoareTripleChecker+Time [2021-11-06 02:01:49,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7243 Invalid, 1922 Unknown, 0 Unchecked, 15.27ms Time], IncrementalHoareTripleChecker [591 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 47936.15ms Time] [2021-11-06 02:01:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-06 02:01:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2021-11-06 02:01:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 471 states have (on average 1.1422505307855626) internal successors, (538), 472 states have internal predecessors, (538), 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) [2021-11-06 02:01:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 538 transitions. [2021-11-06 02:01:50,005 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 538 transitions. Word has length 178 [2021-11-06 02:01:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 02:01:50,005 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 538 transitions. [2021-11-06 02:01:50,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.5454545454545454) internal successors, (168), 66 states have internal predecessors, (168), 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) [2021-11-06 02:01:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 538 transitions. [2021-11-06 02:01:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-06 02:01:50,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 02:01:50,007 INFO L514 BasicCegarLoop]: trace histogram [64, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 02:01:50,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-06 02:01:50,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 02:01:50,219 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 02:01:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 02:01:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1145284768, now seen corresponding path program 3 times [2021-11-06 02:01:50,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 02:01:50,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664101624] [2021-11-06 02:01:50,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 02:01:50,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 02:01:50,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 02:01:50,222 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 02:01:50,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-06 02:01:50,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 02:01:50,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 02:01:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 02:01:50,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 02:01:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3070 trivial. 0 not checked. [2021-11-06 02:01:50,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 02:01:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3070 trivial. 0 not checked. [2021-11-06 02:01:51,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 02:01:51,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664101624] [2021-11-06 02:01:51,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664101624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 02:01:51,364 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 02:01:51,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-06 02:01:51,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387196768] [2021-11-06 02:01:51,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-06 02:01:51,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 02:01:51,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 02:01:51,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 02:01:51,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 02:01:51,365 INFO L87 Difference]: Start difference. First operand 473 states and 538 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-11-06 02:01:52,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-06 02:01:54,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-06 02:01:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 02:01:55,913 INFO L93 Difference]: Finished difference Result 983 states and 1122 transitions. [2021-11-06 02:01:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 02:01:55,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 211 [2021-11-06 02:01:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 02:01:55,916 INFO L225 Difference]: With dead ends: 983 [2021-11-06 02:01:55,916 INFO L226 Difference]: Without dead ends: 555 [2021-11-06 02:01:55,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.61ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 02:01:55,917 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 395 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4377.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4509.14ms IncrementalHoareTripleChecker+Time [2021-11-06 02:01:55,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 335 Invalid, 83 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 1 Unknown, 0 Unchecked, 4509.14ms Time] [2021-11-06 02:01:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-06 02:01:55,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 548. [2021-11-06 02:01:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 546 states have (on average 1.1446886446886446) internal successors, (625), 547 states have internal predecessors, (625), 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) [2021-11-06 02:01:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 625 transitions. [2021-11-06 02:01:55,944 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 625 transitions. Word has length 211 [2021-11-06 02:01:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 02:01:55,944 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 625 transitions. [2021-11-06 02:01:55,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-11-06 02:01:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 625 transitions. [2021-11-06 02:01:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-06 02:01:55,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 02:01:55,946 INFO L514 BasicCegarLoop]: trace histogram [64, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 02:01:55,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-06 02:01:56,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 02:01:56,156 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 02:01:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 02:01:56,157 INFO L85 PathProgramCache]: Analyzing trace with hash 670931834, now seen corresponding path program 1 times [2021-11-06 02:01:56,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 02:01:56,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139646511] [2021-11-06 02:01:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 02:01:56,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 02:01:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 02:01:56,159 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 02:01:56,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-06 02:01:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 02:01:57,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-06 02:01:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 02:02:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 2 proven. 2080 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-06 02:02:00,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 02:02:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 2 proven. 2080 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-06 02:02:13,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 02:02:13,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139646511] [2021-11-06 02:02:13,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139646511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 02:02:13,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 02:02:13,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2021-11-06 02:02:13,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183510157] [2021-11-06 02:02:13,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-06 02:02:13,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-06 02:02:13,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 02:02:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-06 02:02:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4486, Invalid=12806, Unknown=0, NotChecked=0, Total=17292 [2021-11-06 02:02:13,942 INFO L87 Difference]: Start difference. First operand 548 states and 625 transitions. Second operand has 132 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 132 states have internal predecessors, (241), 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) [2021-11-06 02:06:22,965 WARN L230 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 193 [2021-11-06 02:06:30,522 WARN L230 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 190 [2021-11-06 02:06:38,794 WARN L230 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 187 [2021-11-06 02:06:47,153 WARN L230 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 184 [2021-11-06 02:06:55,301 WARN L230 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 181 [2021-11-06 02:07:25,177 WARN L230 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 169 [2021-11-06 02:07:33,017 WARN L230 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 166 [2021-11-06 02:08:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 02:08:36,812 INFO L93 Difference]: Finished difference Result 1003 states and 1217 transitions. [2021-11-06 02:08:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-06 02:08:36,813 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 132 states have internal predecessors, (241), 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 218 [2021-11-06 02:08:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 02:08:36,815 INFO L225 Difference]: With dead ends: 1003 [2021-11-06 02:08:36,815 INFO L226 Difference]: Without dead ends: 614 [2021-11-06 02:08:36,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 265395.91ms TimeCoverageRelationStatistics Valid=12934, Invalid=25286, Unknown=0, NotChecked=0, Total=38220 [2021-11-06 02:08:36,823 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 0 mSDsluCounter, 13869 mSDsCounter, 0 mSdLazyCounter, 4795 mSolverCounterSat, 1119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130027.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14077 SdHoareTripleChecker+Invalid, 5914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.44ms SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 4795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132681.36ms IncrementalHoareTripleChecker+Time [2021-11-06 02:08:36,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14077 Invalid, 5914 Unknown, 0 Unchecked, 29.44ms Time], IncrementalHoareTripleChecker [1119 Valid, 4795 Invalid, 0 Unknown, 0 Unchecked, 132681.36ms Time] [2021-11-06 02:08:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-06 02:08:36,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-06 02:08:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 612 states have (on average 1.1290849673202614) internal successors, (691), 613 states have internal predecessors, (691), 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) [2021-11-06 02:08:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 691 transitions. [2021-11-06 02:08:36,852 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 691 transitions. Word has length 218 [2021-11-06 02:08:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 02:08:36,852 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 691 transitions. [2021-11-06 02:08:36,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 132 states have internal predecessors, (241), 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) [2021-11-06 02:08:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 691 transitions. [2021-11-06 02:08:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-06 02:08:36,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-06 02:08:36,855 INFO L514 BasicCegarLoop]: trace histogram [130, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 02:08:36,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-06 02:08:37,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-06 02:08:37,067 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 02:08:37,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 02:08:37,068 INFO L85 PathProgramCache]: Analyzing trace with hash 249759226, now seen corresponding path program 2 times [2021-11-06 02:08:37,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 02:08:37,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671357880] [2021-11-06 02:08:37,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 02:08:37,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 02:08:37,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 02:08:37,070 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-06 02:08:37,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-06 02:08:38,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 02:08:38,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 02:08:38,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-06 02:08:38,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 02:08:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9507 backedges. 2 proven. 8515 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-06 02:08:49,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 02:09:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9507 backedges. 2 proven. 8515 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-06 02:09:47,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 02:09:47,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671357880] [2021-11-06 02:09:47,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671357880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 02:09:47,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 02:09:47,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 264 [2021-11-06 02:09:47,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970479453] [2021-11-06 02:09:47,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-06 02:09:47,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 264 states [2021-11-06 02:09:47,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 02:09:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 264 interpolants. [2021-11-06 02:09:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17686, Invalid=51746, Unknown=0, NotChecked=0, Total=69432 [2021-11-06 02:09:47,062 INFO L87 Difference]: Start difference. First operand 614 states and 691 transitions. Second operand has 264 states, 264 states have (on average 1.4128787878787878) internal successors, (373), 264 states have internal predecessors, (373), 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) Killed by 15