./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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_OAT_test3-1.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 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 23:36:17,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 23:36:17,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 23:36:17,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 23:36:17,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 23:36:17,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 23:36:17,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 23:36:17,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 23:36:17,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 23:36:17,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 23:36:17,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 23:36:17,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 23:36:17,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 23:36:17,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 23:36:17,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 23:36:17,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 23:36:17,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 23:36:17,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 23:36:17,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 23:36:17,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 23:36:17,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 23:36:17,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 23:36:17,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 23:36:17,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 23:36:17,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 23:36:17,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 23:36:17,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 23:36:17,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 23:36:17,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 23:36:17,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 23:36:17,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 23:36:17,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 23:36:17,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 23:36:17,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 23:36:17,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 23:36:17,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 23:36:17,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 23:36:17,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 23:36:17,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 23:36:17,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 23:36:17,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 23:36:17,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-06 23:36:17,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 23:36:17,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 23:36:17,177 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 23:36:17,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 23:36:17,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 23:36:17,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 23:36:17,178 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 23:36:17,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 23:36:17,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-06 23:36:17,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 23:36:17,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-06 23:36:17,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 23:36:17,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 23:36:17,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 23:36:17,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 23:36:17,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 23:36:17,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 23:36:17,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 23:36:17,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 23:36:17,180 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 23:36:17,180 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 23:36:17,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 23:36:17,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 23:36:17,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c [2021-11-06 23:36:17,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 23:36:17,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 23:36:17,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 23:36:17,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 23:36:17,440 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 23:36:17,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-06 23:36:17,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0339c45/08ee2cfaa6384318be052276fd0568ba/FLAG93585f0b0 [2021-11-06 23:36:17,865 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 23:36:17,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-06 23:36:17,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0339c45/08ee2cfaa6384318be052276fd0568ba/FLAG93585f0b0 [2021-11-06 23:36:18,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0339c45/08ee2cfaa6384318be052276fd0568ba [2021-11-06 23:36:18,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 23:36:18,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 23:36:18,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 23:36:18,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 23:36:18,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 23:36:18,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1ada07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18, skipping insertion in model container [2021-11-06 23:36:18,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 23:36:18,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 23:36:18,525 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_OAT_test3-1.i[33021,33034] [2021-11-06 23:36:18,575 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_OAT_test3-1.i[44590,44603] [2021-11-06 23:36:18,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 23:36:18,584 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 23:36:18,600 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_OAT_test3-1.i[33021,33034] [2021-11-06 23:36:18,630 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_OAT_test3-1.i[44590,44603] [2021-11-06 23:36:18,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 23:36:18,654 INFO L208 MainTranslator]: Completed translation [2021-11-06 23:36:18,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18 WrapperNode [2021-11-06 23:36:18,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 23:36:18,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 23:36:18,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 23:36:18,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 23:36:18,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 23:36:18,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 23:36:18,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 23:36:18,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 23:36:18,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 23:36:18,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 23:36:18,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 23:36:18,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 23:36:18,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (1/1) ... [2021-11-06 23:36:18,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 23:36:18,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:18,835 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 23:36:18,846 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 23:36:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 23:36:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 23:36:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 23:36:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 23:36:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 23:36:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-06 23:36:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 23:36:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 23:36:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 23:36:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 23:36:18,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 23:36:19,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 23:36:19,714 INFO L299 CfgBuilder]: Removed 85 assume(true) statements. [2021-11-06 23:36:19,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:36:19 BoogieIcfgContainer [2021-11-06 23:36:19,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 23:36:19,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 23:36:19,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 23:36:19,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 23:36:19,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:36:18" (1/3) ... [2021-11-06 23:36:19,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76091f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:36:19, skipping insertion in model container [2021-11-06 23:36:19,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:18" (2/3) ... [2021-11-06 23:36:19,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76091f5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:36:19, skipping insertion in model container [2021-11-06 23:36:19,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:36:19" (3/3) ... [2021-11-06 23:36:19,721 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test3-1.i [2021-11-06 23:36:19,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 23:36:19,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-06 23:36:19,749 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 23:36:19,754 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 23:36:19,754 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-06 23:36:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 202 states, 195 states have (on average 1.7230769230769232) internal successors, (336), 201 states have internal predecessors, (336), 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 23:36:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-06 23:36:19,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:19,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:36:19,783 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:19,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:19,789 INFO L85 PathProgramCache]: Analyzing trace with hash 239232295, now seen corresponding path program 1 times [2021-11-06 23:36:19,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:19,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709101730] [2021-11-06 23:36:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:19,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:19,890 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 23:36:19,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:19,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709101730] [2021-11-06 23:36:19,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709101730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:19,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:19,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 23:36:19,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083018730] [2021-11-06 23:36:19,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 23:36:19,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:36:19,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 23:36:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 23:36:19,932 INFO L87 Difference]: Start difference. First operand has 202 states, 195 states have (on average 1.7230769230769232) internal successors, (336), 201 states have internal predecessors, (336), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 23:36:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:19,963 INFO L93 Difference]: Finished difference Result 402 states and 670 transitions. [2021-11-06 23:36:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 23:36:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-06 23:36:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:19,974 INFO L225 Difference]: With dead ends: 402 [2021-11-06 23:36:19,975 INFO L226 Difference]: Without dead ends: 198 [2021-11-06 23:36:19,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 23:36:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-06 23:36:20,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-06 23:36:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.3489583333333333) internal successors, (259), 197 states have internal predecessors, (259), 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 23:36:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2021-11-06 23:36:20,019 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 9 [2021-11-06 23:36:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:20,019 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2021-11-06 23:36:20,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 23:36:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2021-11-06 23:36:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-06 23:36:20,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:20,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:36:20,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 23:36:20,021 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1042319138, now seen corresponding path program 1 times [2021-11-06 23:36:20,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:20,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522452537] [2021-11-06 23:36:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:20,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:20,097 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 23:36:20,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:20,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522452537] [2021-11-06 23:36:20,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522452537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:20,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:20,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 23:36:20,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093304367] [2021-11-06 23:36:20,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:36:20,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:36:20,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:36:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:36:20,101 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 23:36:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:20,324 INFO L93 Difference]: Finished difference Result 445 states and 582 transitions. [2021-11-06 23:36:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:36:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-11-06 23:36:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:20,326 INFO L225 Difference]: With dead ends: 445 [2021-11-06 23:36:20,326 INFO L226 Difference]: Without dead ends: 337 [2021-11-06 23:36:20,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:36:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-06 23:36:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 200. [2021-11-06 23:36:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.3453608247422681) internal successors, (261), 199 states have internal predecessors, (261), 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 23:36:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 261 transitions. [2021-11-06 23:36:20,335 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 261 transitions. Word has length 12 [2021-11-06 23:36:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:20,335 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 261 transitions. [2021-11-06 23:36:20,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 23:36:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 261 transitions. [2021-11-06 23:36:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-06 23:36:20,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:20,337 INFO L513 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] [2021-11-06 23:36:20,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 23:36:20,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash 168111628, now seen corresponding path program 1 times [2021-11-06 23:36:20,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:20,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592120371] [2021-11-06 23:36:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:20,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:20,352 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:36:20,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247784641] [2021-11-06 23:36:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:20,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:36:20,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:20,355 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 23:36:20,356 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 23:36:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:20,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:20,634 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 23:36:20,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:20,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592120371] [2021-11-06 23:36:20,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:36:20,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247784641] [2021-11-06 23:36:20,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247784641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:20,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:20,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 23:36:20,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092006967] [2021-11-06 23:36:20,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 23:36:20,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:36:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 23:36:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:36:20,637 INFO L87 Difference]: Start difference. First operand 200 states and 261 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:20,698 INFO L93 Difference]: Finished difference Result 417 states and 549 transitions. [2021-11-06 23:36:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:36:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-06 23:36:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:20,699 INFO L225 Difference]: With dead ends: 417 [2021-11-06 23:36:20,700 INFO L226 Difference]: Without dead ends: 221 [2021-11-06 23:36:20,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:36:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-06 23:36:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2021-11-06 23:36:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.3130841121495327) internal successors, (281), 219 states have internal predecessors, (281), 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 23:36:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 281 transitions. [2021-11-06 23:36:20,706 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 281 transitions. Word has length 64 [2021-11-06 23:36:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:20,706 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 281 transitions. [2021-11-06 23:36:20,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 281 transitions. [2021-11-06 23:36:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-06 23:36:20,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:20,708 INFO L513 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] [2021-11-06 23:36:20,727 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 23:36:20,927 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 23:36:20,927 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:20,928 INFO L85 PathProgramCache]: Analyzing trace with hash 521200010, now seen corresponding path program 1 times [2021-11-06 23:36:20,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:20,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544722201] [2021-11-06 23:36:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:20,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:20,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:36:20,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254143533] [2021-11-06 23:36:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:20,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:36:20,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:20,951 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 23:36:20,952 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 23:36:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:21,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:21,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:21,277 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 23:36:21,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:21,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544722201] [2021-11-06 23:36:21,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:36:21,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254143533] [2021-11-06 23:36:21,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254143533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:21,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:21,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 23:36:21,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776359895] [2021-11-06 23:36:21,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:36:21,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:36:21,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:36:21,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:36:21,280 INFO L87 Difference]: Start difference. First operand 220 states and 281 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:21,334 INFO L93 Difference]: Finished difference Result 428 states and 550 transitions. [2021-11-06 23:36:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:36:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-06 23:36:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:21,336 INFO L225 Difference]: With dead ends: 428 [2021-11-06 23:36:21,336 INFO L226 Difference]: Without dead ends: 212 [2021-11-06 23:36:21,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:36:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-06 23:36:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2021-11-06 23:36:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.3) internal successors, (260), 205 states have internal predecessors, (260), 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 23:36:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 260 transitions. [2021-11-06 23:36:21,352 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 260 transitions. Word has length 64 [2021-11-06 23:36:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:21,352 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 260 transitions. [2021-11-06 23:36:21,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 260 transitions. [2021-11-06 23:36:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-06 23:36:21,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:21,358 INFO L513 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] [2021-11-06 23:36:21,389 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 23:36:21,571 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 23:36:21,572 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:21,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:21,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1012352744, now seen corresponding path program 1 times [2021-11-06 23:36:21,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:21,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473748490] [2021-11-06 23:36:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:21,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:21,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:36:21,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556436150] [2021-11-06 23:36:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:21,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:36:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:21,620 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 23:36:21,621 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 23:36:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:21,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 23:36:21,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:21,989 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 23:36:21,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:21,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473748490] [2021-11-06 23:36:21,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:36:21,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556436150] [2021-11-06 23:36:21,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556436150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:21,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:21,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 23:36:21,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574224480] [2021-11-06 23:36:21,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 23:36:21,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:36:21,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 23:36:21,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:36:21,991 INFO L87 Difference]: Start difference. First operand 206 states and 260 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:22,041 INFO L93 Difference]: Finished difference Result 542 states and 683 transitions. [2021-11-06 23:36:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:36:22,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-06 23:36:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:22,043 INFO L225 Difference]: With dead ends: 542 [2021-11-06 23:36:22,043 INFO L226 Difference]: Without dead ends: 340 [2021-11-06 23:36:22,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:36:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-06 23:36:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 312. [2021-11-06 23:36:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.2843137254901962) internal successors, (393), 311 states have internal predecessors, (393), 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 23:36:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 393 transitions. [2021-11-06 23:36:22,049 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 393 transitions. Word has length 64 [2021-11-06 23:36:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:22,049 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 393 transitions. [2021-11-06 23:36:22,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 393 transitions. [2021-11-06 23:36:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-06 23:36:22,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:22,050 INFO L513 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] [2021-11-06 23:36:22,070 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 23:36:22,267 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 23:36:22,268 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash -147792665, now seen corresponding path program 1 times [2021-11-06 23:36:22,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:22,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963079819] [2021-11-06 23:36:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:22,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:22,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:36:22,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094467183] [2021-11-06 23:36:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:22,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:36:22,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:22,281 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 23:36:22,282 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 23:36:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:22,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:22,577 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 23:36:22,586 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 23:36:22,597 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 23:36:22,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:22,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963079819] [2021-11-06 23:36:22,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:36:22,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094467183] [2021-11-06 23:36:22,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094467183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:22,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:22,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 23:36:22,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405580633] [2021-11-06 23:36:22,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:36:22,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:36:22,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:36:22,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:36:22,600 INFO L87 Difference]: Start difference. First operand 312 states and 393 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 23:36:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:22,764 INFO L93 Difference]: Finished difference Result 421 states and 537 transitions. [2021-11-06 23:36:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:36:22,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 71 [2021-11-06 23:36:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:22,766 INFO L225 Difference]: With dead ends: 421 [2021-11-06 23:36:22,766 INFO L226 Difference]: Without dead ends: 396 [2021-11-06 23:36:22,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:36:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-06 23:36:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 314. [2021-11-06 23:36:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 308 states have (on average 1.2824675324675325) internal successors, (395), 313 states have internal predecessors, (395), 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 23:36:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 395 transitions. [2021-11-06 23:36:22,772 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 395 transitions. Word has length 71 [2021-11-06 23:36:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:22,773 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 395 transitions. [2021-11-06 23:36:22,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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 23:36:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 395 transitions. [2021-11-06 23:36:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 23:36:22,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:22,774 INFO L513 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 23:36:22,791 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 23:36:22,978 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 23:36:22,979 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:22,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2000986198, now seen corresponding path program 1 times [2021-11-06 23:36:22,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:22,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003404157] [2021-11-06 23:36:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:22,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:22,991 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:36:22,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135107587] [2021-11-06 23:36:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:22,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:36:22,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:22,993 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 23:36:22,994 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 23:36:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:23,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:23,328 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 23:36:23,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:23,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003404157] [2021-11-06 23:36:23,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:36:23,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135107587] [2021-11-06 23:36:23,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135107587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:23,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:23,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 23:36:23,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314744973] [2021-11-06 23:36:23,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 23:36:23,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:36:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 23:36:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:36:23,333 INFO L87 Difference]: Start difference. First operand 314 states and 395 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 23:36:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:23,374 INFO L93 Difference]: Finished difference Result 525 states and 681 transitions. [2021-11-06 23:36:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:36:23,375 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 23:36:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:23,376 INFO L225 Difference]: With dead ends: 525 [2021-11-06 23:36:23,376 INFO L226 Difference]: Without dead ends: 356 [2021-11-06 23:36:23,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:36:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-06 23:36:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 354. [2021-11-06 23:36:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 348 states have (on average 1.25) internal successors, (435), 353 states have internal predecessors, (435), 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 23:36:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 435 transitions. [2021-11-06 23:36:23,383 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 435 transitions. Word has length 103 [2021-11-06 23:36:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:23,386 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 435 transitions. [2021-11-06 23:36:23,386 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 23:36:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 435 transitions. [2021-11-06 23:36:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 23:36:23,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:23,390 INFO L513 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 23:36:23,407 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 23:36:23,604 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 23:36:23,604 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:23,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1973776046, now seen corresponding path program 1 times [2021-11-06 23:36:23,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:23,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603381969] [2021-11-06 23:36:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:23,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:23,616 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:36:23,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719489658] [2021-11-06 23:36:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:23,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:36:23,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:23,632 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 23:36:23,656 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 23:36:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:23,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:24,055 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 23:36:24,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:24,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603381969] [2021-11-06 23:36:24,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:36:24,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719489658] [2021-11-06 23:36:24,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719489658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:24,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:24,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 23:36:24,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341543711] [2021-11-06 23:36:24,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:36:24,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:36:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:36:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:36:24,057 INFO L87 Difference]: Start difference. First operand 354 states and 435 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 23:36:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:24,100 INFO L93 Difference]: Finished difference Result 540 states and 676 transitions. [2021-11-06 23:36:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:36:24,101 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 23:36:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:24,102 INFO L225 Difference]: With dead ends: 540 [2021-11-06 23:36:24,102 INFO L226 Difference]: Without dead ends: 331 [2021-11-06 23:36:24,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:36:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-06 23:36:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 326. [2021-11-06 23:36:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 320 states have (on average 1.228125) internal successors, (393), 325 states have internal predecessors, (393), 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 23:36:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 393 transitions. [2021-11-06 23:36:24,107 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 393 transitions. Word has length 103 [2021-11-06 23:36:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:24,108 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 393 transitions. [2021-11-06 23:36:24,108 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 23:36:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 393 transitions. [2021-11-06 23:36:24,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 23:36:24,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:24,109 INFO L513 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 23:36:24,142 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 23:36:24,326 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 23:36:24,327 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:24,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:24,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1090927200, now seen corresponding path program 1 times [2021-11-06 23:36:24,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:24,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174898571] [2021-11-06 23:36:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:24,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:24,342 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:36:24,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696971916] [2021-11-06 23:36:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:24,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:36:24,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:24,344 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 23:36:24,344 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 23:36:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 23:36:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:24,774 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 23:36:24,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:24,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174898571] [2021-11-06 23:36:24,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:36:24,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696971916] [2021-11-06 23:36:24,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696971916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:24,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:24,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 23:36:24,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131484000] [2021-11-06 23:36:24,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:36:24,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:36:24,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:36:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:36:24,777 INFO L87 Difference]: Start difference. First operand 326 states and 393 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 23:36:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:24,925 INFO L93 Difference]: Finished difference Result 740 states and 900 transitions. [2021-11-06 23:36:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 23:36:24,926 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 23:36:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:24,927 INFO L225 Difference]: With dead ends: 740 [2021-11-06 23:36:24,927 INFO L226 Difference]: Without dead ends: 462 [2021-11-06 23:36:24,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:36:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-06 23:36:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 410. [2021-11-06 23:36:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 404 states have (on average 1.2301980198019802) internal successors, (497), 409 states have internal predecessors, (497), 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 23:36:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 497 transitions. [2021-11-06 23:36:24,949 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 497 transitions. Word has length 103 [2021-11-06 23:36:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:24,949 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 497 transitions. [2021-11-06 23:36:24,949 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 23:36:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 497 transitions. [2021-11-06 23:36:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-06 23:36:24,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:24,950 INFO L513 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 23:36:24,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-06 23:36:25,168 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 23:36:25,169 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:25,169 INFO L85 PathProgramCache]: Analyzing trace with hash 541561274, now seen corresponding path program 1 times [2021-11-06 23:36:25,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:36:25,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940074172] [2021-11-06 23:36:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:25,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:36:25,194 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:36:25,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313977622] [2021-11-06 23:36:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:25,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:36:25,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:25,196 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 23:36:25,235 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 23:36:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-06 23:36:25,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:25,505 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 23:36:25,527 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 23:36:25,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:25,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:25,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:25,569 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 23:36:26,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,331 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 23:36:26,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,337 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 37 treesize of output 42 [2021-11-06 23:36:26,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,393 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 23:36:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:26,445 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 23:36:26,456 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 13 treesize of output 9 [2021-11-06 23:36:26,464 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 27 treesize of output 23 [2021-11-06 23:36:26,473 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-06 23:36:26,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-06 23:36:27,598 INFO L354 Elim1Store]: treesize reduction 364, result has 11.9 percent of original size [2021-11-06 23:36:27,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 2832 treesize of output 2281 [2021-11-06 23:36:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 23:36:31,566 INFO L354 Elim1Store]: treesize reduction 7776, result has 3.0 percent of original size [2021-11-06 23:36:31,567 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 3301 treesize of output 1804 [2021-11-06 23:36:31,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:36:31,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940074172] [2021-11-06 23:36:31,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:36:31,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313977622] [2021-11-06 23:36:31,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-06 23:36:31,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:31,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-06 23:36:31,638 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-06 23:36:31,640 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-06 23:36:31,648 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-06 23:36:31,649 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-06 23:36:31,649 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-06 23:36:31,649 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-06 23:36:31,650 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-06 23:36:31,650 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-11-06 23:36:31,670 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 23:36:31,860 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 23:36:31,863 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:36:31,865 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-06 23:36:31,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 11:36:31 BoogieIcfgContainer [2021-11-06 23:36:31,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-06 23:36:31,885 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-06 23:36:31,885 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-06 23:36:31,886 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-06 23:36:31,886 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:36:19" (3/4) ... [2021-11-06 23:36:31,889 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-06 23:36:31,889 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-06 23:36:31,889 INFO L168 Benchmark]: Toolchain (without parser) took 13664.88 ms. Allocated memory was 130.0 MB in the beginning and 253.8 MB in the end (delta: 123.7 MB). Free memory was 96.0 MB in the beginning and 107.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 110.0 MB. Max. memory is 16.1 GB. [2021-11-06 23:36:31,890 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 77.6 MB. Free memory is still 34.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-06 23:36:31,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.21 ms. Allocated memory is still 130.0 MB. Free memory was 95.7 MB in the beginning and 82.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-06 23:36:31,890 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.83 ms. Allocated memory is still 130.0 MB. Free memory was 82.8 MB in the beginning and 75.9 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-06 23:36:31,890 INFO L168 Benchmark]: Boogie Preprocessor took 62.56 ms. Allocated memory is still 130.0 MB. Free memory was 75.9 MB in the beginning and 69.0 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-06 23:36:31,890 INFO L168 Benchmark]: RCFGBuilder took 928.90 ms. Allocated memory is still 130.0 MB. Free memory was 69.0 MB in the beginning and 66.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 41.9 MB. Max. memory is 16.1 GB. [2021-11-06 23:36:31,891 INFO L168 Benchmark]: TraceAbstraction took 12168.31 ms. Allocated memory was 130.0 MB in the beginning and 253.8 MB in the end (delta: 123.7 MB). Free memory was 66.2 MB in the beginning and 107.9 MB in the end (delta: -41.7 MB). Peak memory consumption was 118.3 MB. Max. memory is 16.1 GB. [2021-11-06 23:36:31,891 INFO L168 Benchmark]: Witness Printer took 3.62 ms. Allocated memory is still 253.8 MB. Free memory is still 107.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-06 23:36:31,892 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 77.6 MB. Free memory is still 34.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 429.21 ms. Allocated memory is still 130.0 MB. Free memory was 95.7 MB in the beginning and 82.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.83 ms. Allocated memory is still 130.0 MB. Free memory was 82.8 MB in the beginning and 75.9 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.56 ms. Allocated memory is still 130.0 MB. Free memory was 75.9 MB in the beginning and 69.0 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 928.90 ms. Allocated memory is still 130.0 MB. Free memory was 69.0 MB in the beginning and 66.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 41.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12168.31 ms. Allocated memory was 130.0 MB in the beginning and 253.8 MB in the end (delta: 123.7 MB). Free memory was 66.2 MB in the beginning and 107.9 MB in the end (delta: -41.7 MB). Peak memory consumption was 118.3 MB. Max. memory is 16.1 GB. * Witness Printer took 3.62 ms. Allocated memory is still 253.8 MB. Free memory is still 107.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 750]: 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 745, overapproximation of bitwiseAnd at line 745. Possible FailurePath: [L706] int count_int_int = 0; [L733] int i; [L734] example_user_t *user, *tmp, *users=((void *)0); [L735] i=0 [L735] EXPR \read(i) [L735] COND TRUE i<10 [L736] user = (example_user_t*)malloc(sizeof(example_user_t)) [L737] COND FALSE !(user == ((void *)0)) [L740] EXPR \read(i) [L740] user->id = i [L741] EXPR \read(i) [L741] EXPR \read(i) [L741] user->cookie = i*i [L742] unsigned _ha_hashv; [L742] unsigned _hj_i,_hj_j,_hj_k; [L742] unsigned const char *_hj_key=(unsigned const char*)(&((user)->id)); [L742] _ha_hashv = 0xfeedbeefu [L742] EXPR _hj_j = 0x9e3779b9u [L742] _hj_i = _hj_j = 0x9e3779b9u [L742] _hj_k = (unsigned)(sizeof(int)) [L742] COND FALSE !(_hj_k >= 12U) [L742] _ha_hashv += (unsigned)(sizeof(int)) [L742] case 11: [L742] case 10: [L742] case 9: [L742] case 8: [L742] case 7: [L742] case 6: [L742] case 5: [L742] case 4: [L742] EXPR _hj_key[3] [L742] _hj_i += ( (unsigned)_hj_key[3] << 24 ) [L742] case 3: [L742] EXPR _hj_key[2] [L742] _hj_i += ( (unsigned)_hj_key[2] << 16 ) [L742] case 2: [L742] EXPR _hj_key[1] [L742] _hj_i += ( (unsigned)_hj_key[1] << 8 ) [L742] case 1: [L742] EXPR _hj_key[0] [L742] _hj_i += _hj_key[0] [L742] _hj_i -= _hj_j [L742] _hj_i -= _ha_hashv [L742] _hj_i ^= ( _ha_hashv >> 13 ) [L742] _hj_j -= _ha_hashv [L742] _hj_j -= _hj_i [L742] _hj_j ^= ( _hj_i << 8 ) [L742] _ha_hashv -= _hj_i [L742] _ha_hashv -= _hj_j [L742] _ha_hashv ^= ( _hj_j >> 13 ) [L742] _hj_i -= _hj_j [L742] _hj_i -= _ha_hashv [L742] _hj_i ^= ( _ha_hashv >> 12 ) [L742] _hj_j -= _ha_hashv [L742] _hj_j -= _hj_i [L742] _hj_j ^= ( _hj_i << 16 ) [L742] _ha_hashv -= _hj_i [L742] _ha_hashv -= _hj_j [L742] _ha_hashv ^= ( _hj_j >> 5 ) [L742] _hj_i -= _hj_j [L742] _hj_i -= _ha_hashv [L742] _hj_i ^= ( _ha_hashv >> 3 ) [L742] _hj_j -= _ha_hashv [L742] _hj_j -= _hj_i [L742] _hj_j ^= ( _hj_i << 10 ) [L742] _ha_hashv -= _hj_i [L742] _ha_hashv -= _hj_j [L742] _ha_hashv ^= ( _hj_j >> 15 ) [L742] (user)->hh.hashv = (_ha_hashv) [L742] (user)->hh.key = (char*) (&((user)->id)) [L742] (user)->hh.keylen = (unsigned) (sizeof(int)) [L742] COND TRUE !(users) [L742] (user)->hh.next = ((void *)0) [L742] (user)->hh.prev = ((void *)0) [L742] (user)->hh.tbl = (UT_hash_table*)malloc(sizeof(UT_hash_table)) [L742] EXPR (user)->hh.tbl [L742] COND FALSE !(!(user)->hh.tbl) [L742] (user)->hh.tbl [L742] EXPR (user)->hh.tbl [L742] (user)->hh.tbl->tail = &((user)->hh) [L742] EXPR (user)->hh.tbl [L742] (user)->hh.tbl->num_buckets = 32U [L742] EXPR (user)->hh.tbl [L742] (user)->hh.tbl->log2_num_buckets = 5U [L742] EXPR (user)->hh.tbl [L742] (user)->hh.tbl->hho = (char*)(&(user)->hh) - (char*)(user) [L742] EXPR (user)->hh.tbl [L742] (user)->hh.tbl->buckets = (UT_hash_bucket*)malloc(32U * sizeof(struct UT_hash_bucket)) [L742] EXPR (user)->hh.tbl [L742] (user)->hh.tbl->signature = 0xa0111fe1u [L742] EXPR (user)->hh.tbl [L742] EXPR (user)->hh.tbl->buckets [L742] COND FALSE !(!(user)->hh.tbl->buckets) [L742] EXPR (user)->hh.tbl [L742] (user)->hh.tbl->buckets [L742] (users) = (user) [L742] unsigned _ha_bkt; [L742] EXPR (users)->hh.tbl [L742] EXPR (users)->hh.tbl->num_items [L742] (users)->hh.tbl->num_items++ [L742] EXPR (users)->hh.tbl [L742] EXPR (users)->hh.tbl->num_buckets [L742] _ha_bkt = ((_ha_hashv) & (((users)->hh.tbl->num_buckets) - 1U)) [L742] EXPR (users)->hh.tbl [L742] EXPR (users)->hh.tbl->buckets [L742] UT_hash_bucket *_ha_head = &((users)->hh.tbl->buckets[_ha_bkt]); [L742] EXPR _ha_head->count [L742] _ha_head->count++ [L742] EXPR _ha_head->hh_head [L742] (&(user)->hh)->hh_next = _ha_head->hh_head [L742] (&(user)->hh)->hh_prev = ((void *)0) [L742] EXPR _ha_head->hh_head [L742] COND FALSE !(_ha_head->hh_head != ((void *)0)) [L742] _ha_head->hh_head = (&(user)->hh) [L742] EXPR _ha_head->count [L742] EXPR _ha_head->expand_mult [L742] (_ha_head->count >= ((_ha_head->expand_mult + 1U) * 10U)) && !(&(user)->hh)->tbl->noexpand [L742] EXPR (&(user)->hh)->tbl [L742] EXPR (&(user)->hh)->tbl->noexpand [L742] (_ha_head->count >= ((_ha_head->expand_mult + 1U) * 10U)) && !(&(user)->hh)->tbl->noexpand [L742] COND FALSE !((_ha_head->count >= ((_ha_head->expand_mult + 1U) * 10U)) && !(&(user)->hh)->tbl->noexpand) [L735] EXPR \read(i) [L735] i++ [L735] EXPR \read(i) [L735] COND FALSE !(i<10) [L744] i=0 [L744] EXPR \read(i) [L744] COND TRUE i<10 [L745] unsigned _hf_hashv; [L745] unsigned _hj_i,_hj_j,_hj_k; [L745] unsigned const char *_hj_key=(unsigned const char*)(&i); [L745] _hf_hashv = 0xfeedbeefu [L745] EXPR _hj_j = 0x9e3779b9u [L745] _hj_i = _hj_j = 0x9e3779b9u [L745] _hj_k = (unsigned)(sizeof(int)) [L745] COND FALSE !(_hj_k >= 12U) [L745] _hf_hashv += (unsigned)(sizeof(int)) [L745] case 11: [L745] case 10: [L745] case 9: [L745] case 8: [L745] case 7: [L745] case 6: [L745] case 5: [L745] case 4: [L745] EXPR _hj_key[3] [L745] _hj_i += ( (unsigned)_hj_key[3] << 24 ) [L745] case 3: [L745] EXPR _hj_key[2] [L745] _hj_i += ( (unsigned)_hj_key[2] << 16 ) [L745] case 2: [L745] EXPR _hj_key[1] [L745] _hj_i += ( (unsigned)_hj_key[1] << 8 ) [L745] case 1: [L745] EXPR _hj_key[0] [L745] _hj_i += _hj_key[0] [L745] _hj_i -= _hj_j [L745] _hj_i -= _hf_hashv [L745] _hj_i ^= ( _hf_hashv >> 13 ) [L745] _hj_j -= _hf_hashv [L745] _hj_j -= _hj_i [L745] _hj_j ^= ( _hj_i << 8 ) [L745] _hf_hashv -= _hj_i [L745] _hf_hashv -= _hj_j [L745] _hf_hashv ^= ( _hj_j >> 13 ) [L745] _hj_i -= _hj_j [L745] _hj_i -= _hf_hashv [L745] _hj_i ^= ( _hf_hashv >> 12 ) [L745] _hj_j -= _hf_hashv [L745] _hj_j -= _hj_i [L745] _hj_j ^= ( _hj_i << 16 ) [L745] _hf_hashv -= _hj_i [L745] _hf_hashv -= _hj_j [L745] _hf_hashv ^= ( _hj_j >> 5 ) [L745] _hj_i -= _hj_j [L745] _hj_i -= _hf_hashv [L745] _hj_i ^= ( _hf_hashv >> 3 ) [L745] _hj_j -= _hf_hashv [L745] _hj_j -= _hj_i [L745] _hj_j ^= ( _hj_i << 10 ) [L745] _hf_hashv -= _hj_i [L745] _hf_hashv -= _hj_j [L745] _hf_hashv ^= ( _hj_j >> 15 ) [L745] (tmp) = ((void *)0) [L745] COND TRUE \read(*users) [L745] unsigned _hf_bkt; [L745] EXPR (users)->hh.tbl [L745] EXPR (users)->hh.tbl->num_buckets [L745] _hf_bkt = ((_hf_hashv) & (((users)->hh.tbl->num_buckets) - 1U)) [L745] EXPR (users)->hh.tbl [L745] EXPR (users)->hh.tbl->buckets [L745] EXPR ((users)->hh.tbl->buckets[ _hf_bkt ]).hh_head [L745] COND FALSE !(((users)->hh.tbl->buckets[ _hf_bkt ]).hh_head != ((void *)0)) [L745] (tmp) = ((void *)0) [L745] COND FALSE !((tmp) != ((void *)0)) [L746] COND FALSE !(tmp != ((void *)0)) [L750] reach_error() - UnprovableResult [Line: 703]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 703]: 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, 202 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 12.1s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2263 SDtfs, 1332 SDslu, 2278 SDs, 0 SdLazy, 569 SolverSat, 120 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 577 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=410occurred in iteration=9, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 313 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 703 NumberOfCodeBlocks, 703 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 584 ConstructedInterpolants, 0 QuantifiedInterpolants, 1117 SizeOfPredicates, 6 NumberOfNonLiveVariables, 2355 ConjunctsInSsa, 76 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 23:36:31,931 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_OAT_test3-1.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 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 23:36:33,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 23:36:33,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 23:36:33,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 23:36:33,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 23:36:33,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 23:36:33,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 23:36:33,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 23:36:33,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 23:36:33,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 23:36:33,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 23:36:33,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 23:36:33,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 23:36:33,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 23:36:33,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 23:36:33,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 23:36:33,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 23:36:33,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 23:36:33,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 23:36:33,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 23:36:33,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 23:36:33,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 23:36:33,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 23:36:33,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 23:36:33,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 23:36:33,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 23:36:33,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 23:36:33,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 23:36:33,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 23:36:33,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 23:36:33,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 23:36:33,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 23:36:33,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 23:36:33,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 23:36:33,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 23:36:33,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 23:36:33,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 23:36:33,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 23:36:33,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 23:36:33,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 23:36:33,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 23:36:33,870 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-06 23:36:33,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 23:36:33,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 23:36:33,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 23:36:33,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 23:36:33,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 23:36:33,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 23:36:33,903 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 23:36:33,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 23:36:33,903 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-06 23:36:33,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-06 23:36:33,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 23:36:33,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 23:36:33,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 23:36:33,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 23:36:33,904 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-06 23:36:33,905 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-06 23:36:33,905 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-06 23:36:33,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 23:36:33,905 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 23:36:33,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 23:36:33,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 23:36:33,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 23:36:33,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 23:36:33,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 23:36:33,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 23:36:33,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 23:36:33,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 23:36:33,906 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-06 23:36:33,906 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-06 23:36:33,907 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 23:36:33,907 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 23:36:33,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 23:36:33,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 23:36:33,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-06 23:36:33,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c [2021-11-06 23:36:34,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 23:36:34,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 23:36:34,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 23:36:34,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 23:36:34,293 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 23:36:34,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-06 23:36:34,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73967f787/36dc276029ca470d92d7d1b4212ff3c7/FLAGb437d1a3b [2021-11-06 23:36:34,759 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 23:36:34,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2021-11-06 23:36:34,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73967f787/36dc276029ca470d92d7d1b4212ff3c7/FLAGb437d1a3b [2021-11-06 23:36:34,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73967f787/36dc276029ca470d92d7d1b4212ff3c7 [2021-11-06 23:36:34,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 23:36:34,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 23:36:34,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 23:36:34,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 23:36:34,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 23:36:34,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:36:34" (1/1) ... [2021-11-06 23:36:34,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30be0224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:34, skipping insertion in model container [2021-11-06 23:36:34,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:36:34" (1/1) ... [2021-11-06 23:36:34,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 23:36:34,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 23:36:35,166 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_OAT_test3-1.i[33021,33034] [2021-11-06 23:36:35,279 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_OAT_test3-1.i[44590,44603] [2021-11-06 23:36:35,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 23:36:35,303 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 23:36:35,339 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_OAT_test3-1.i[33021,33034] [2021-11-06 23:36:35,380 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_OAT_test3-1.i[44590,44603] [2021-11-06 23:36:35,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 23:36:35,435 INFO L208 MainTranslator]: Completed translation [2021-11-06 23:36:35,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35 WrapperNode [2021-11-06 23:36:35,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 23:36:35,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 23:36:35,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 23:36:35,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 23:36:35,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 23:36:35,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 23:36:35,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 23:36:35,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 23:36:35,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 23:36:35,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 23:36:35,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 23:36:35,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 23:36:35,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (1/1) ... [2021-11-06 23:36:35,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 23:36:35,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:36:35,622 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 23:36:35,640 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 23:36:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-06 23:36:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-06 23:36:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 23:36:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 23:36:35,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 23:36:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-06 23:36:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 23:36:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 23:36:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-06 23:36:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-06 23:36:35,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 23:36:35,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 23:36:38,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 23:36:38,847 INFO L299 CfgBuilder]: Removed 85 assume(true) statements. [2021-11-06 23:36:38,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:36:38 BoogieIcfgContainer [2021-11-06 23:36:38,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 23:36:38,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 23:36:38,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 23:36:38,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 23:36:38,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:36:34" (1/3) ... [2021-11-06 23:36:38,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f59e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:36:38, skipping insertion in model container [2021-11-06 23:36:38,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:36:35" (2/3) ... [2021-11-06 23:36:38,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f59e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:36:38, skipping insertion in model container [2021-11-06 23:36:38,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:36:38" (3/3) ... [2021-11-06 23:36:38,854 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test3-1.i [2021-11-06 23:36:38,857 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 23:36:38,857 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-06 23:36:38,898 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 23:36:38,904 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 23:36:38,904 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-06 23:36:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 202 states, 195 states have (on average 1.7230769230769232) internal successors, (336), 201 states have internal predecessors, (336), 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 23:36:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-06 23:36:38,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:38,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:36:38,925 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:38,928 INFO L85 PathProgramCache]: Analyzing trace with hash 239232295, now seen corresponding path program 1 times [2021-11-06 23:36:38,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:38,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205907966] [2021-11-06 23:36:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:38,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:38,939 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 23:36:38,968 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 23:36:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-06 23:36:39,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:36:39,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:39,159 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 23:36:39,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:39,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205907966] [2021-11-06 23:36:39,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205907966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:39,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:39,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-06 23:36:39,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49959964] [2021-11-06 23:36:39,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 23:36:39,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:39,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 23:36:39,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 23:36:39,176 INFO L87 Difference]: Start difference. First operand has 202 states, 195 states have (on average 1.7230769230769232) internal successors, (336), 201 states have internal predecessors, (336), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 23:36:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:39,195 INFO L93 Difference]: Finished difference Result 402 states and 670 transitions. [2021-11-06 23:36:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 23:36:39,196 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-06 23:36:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:39,210 INFO L225 Difference]: With dead ends: 402 [2021-11-06 23:36:39,210 INFO L226 Difference]: Without dead ends: 198 [2021-11-06 23:36:39,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 23:36:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-06 23:36:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-06 23:36:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.3489583333333333) internal successors, (259), 197 states have internal predecessors, (259), 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 23:36:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2021-11-06 23:36:39,237 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 9 [2021-11-06 23:36:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:39,238 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2021-11-06 23:36:39,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 23:36:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2021-11-06 23:36:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-06 23:36:39,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:39,239 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:36:39,257 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 23:36:39,447 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 23:36:39,447 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:39,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:39,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1042319138, now seen corresponding path program 1 times [2021-11-06 23:36:39,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:39,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737362697] [2021-11-06 23:36:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:39,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:39,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:39,450 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 23:36:39,452 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 23:36:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:39,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:39,581 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 23:36:39,603 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 23:36:39,627 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 23:36:39,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:39,672 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 23:36:39,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:39,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737362697] [2021-11-06 23:36:39,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737362697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:39,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:39,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-06 23:36:39,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487554481] [2021-11-06 23:36:39,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 23:36:39,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 23:36:39,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 23:36:39,675 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:42,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:42,573 INFO L93 Difference]: Finished difference Result 552 states and 722 transitions. [2021-11-06 23:36:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 23:36:42,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-06 23:36:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:42,576 INFO L225 Difference]: With dead ends: 552 [2021-11-06 23:36:42,577 INFO L226 Difference]: Without dead ends: 444 [2021-11-06 23:36:42,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 23:36:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-06 23:36:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 200. [2021-11-06 23:36:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.3453608247422681) internal successors, (261), 199 states have internal predecessors, (261), 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 23:36:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 261 transitions. [2021-11-06 23:36:42,597 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 261 transitions. Word has length 12 [2021-11-06 23:36:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:42,598 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 261 transitions. [2021-11-06 23:36:42,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 261 transitions. [2021-11-06 23:36:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-06 23:36:42,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:42,601 INFO L513 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] [2021-11-06 23:36:42,612 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 23:36:42,808 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 23:36:42,809 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash 168111628, now seen corresponding path program 1 times [2021-11-06 23:36:42,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:42,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994390063] [2021-11-06 23:36:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:42,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:42,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:42,812 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 23:36:42,813 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 23:36:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:42,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:43,144 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 23:36:43,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:43,312 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 23:36:43,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:43,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994390063] [2021-11-06 23:36:43,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994390063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:43,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:43,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-06 23:36:43,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756942416] [2021-11-06 23:36:43,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 23:36:43,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 23:36:43,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:36:43,314 INFO L87 Difference]: Start difference. First operand 200 states and 261 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:43,407 INFO L93 Difference]: Finished difference Result 405 states and 530 transitions. [2021-11-06 23:36:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:36:43,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-06 23:36:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:43,408 INFO L225 Difference]: With dead ends: 405 [2021-11-06 23:36:43,408 INFO L226 Difference]: Without dead ends: 209 [2021-11-06 23:36:43,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-06 23:36:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-06 23:36:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 203. [2021-11-06 23:36:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.299492385786802) internal successors, (256), 202 states have internal predecessors, (256), 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 23:36:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 256 transitions. [2021-11-06 23:36:43,419 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 256 transitions. Word has length 64 [2021-11-06 23:36:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:43,420 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 256 transitions. [2021-11-06 23:36:43,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 256 transitions. [2021-11-06 23:36:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-06 23:36:43,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:43,421 INFO L513 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] [2021-11-06 23:36:43,434 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 23:36:43,622 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 23:36:43,622 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1012352744, now seen corresponding path program 1 times [2021-11-06 23:36:43,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:43,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721772684] [2021-11-06 23:36:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:43,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:43,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:43,639 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 23:36:43,651 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 23:36:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:43,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:43,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:44,132 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 23:36:44,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:44,414 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 23:36:44,414 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:44,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721772684] [2021-11-06 23:36:44,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721772684] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:44,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:44,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-06 23:36:44,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219018799] [2021-11-06 23:36:44,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 23:36:44,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:44,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 23:36:44,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:36:44,417 INFO L87 Difference]: Start difference. First operand 203 states and 256 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:45,402 INFO L93 Difference]: Finished difference Result 533 states and 671 transitions. [2021-11-06 23:36:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:36:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-06 23:36:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:45,404 INFO L225 Difference]: With dead ends: 533 [2021-11-06 23:36:45,405 INFO L226 Difference]: Without dead ends: 334 [2021-11-06 23:36:45,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:36:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-06 23:36:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 306. [2021-11-06 23:36:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 300 states have (on average 1.2833333333333334) internal successors, (385), 305 states have internal predecessors, (385), 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 23:36:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 385 transitions. [2021-11-06 23:36:45,433 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 385 transitions. Word has length 64 [2021-11-06 23:36:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:45,434 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 385 transitions. [2021-11-06 23:36:45,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:36:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 385 transitions. [2021-11-06 23:36:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-06 23:36:45,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:45,438 INFO L513 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] [2021-11-06 23:36:45,461 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 23:36:45,648 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 23:36:45,648 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:45,649 INFO L85 PathProgramCache]: Analyzing trace with hash -147792665, now seen corresponding path program 1 times [2021-11-06 23:36:45,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:45,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440848588] [2021-11-06 23:36:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:45,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:45,651 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 23:36:45,652 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 23:36:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:45,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:46,040 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 23:36:46,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:46,166 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 23:36:46,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:46,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440848588] [2021-11-06 23:36:46,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440848588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:46,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:46,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-06 23:36:46,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032476134] [2021-11-06 23:36:46,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:36:46,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:46,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:36:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:36:46,168 INFO L87 Difference]: Start difference. First operand 306 states and 385 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 23:36:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:46,227 INFO L93 Difference]: Finished difference Result 570 states and 727 transitions. [2021-11-06 23:36:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:36:46,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 71 [2021-11-06 23:36:46,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:46,229 INFO L225 Difference]: With dead ends: 570 [2021-11-06 23:36:46,229 INFO L226 Difference]: Without dead ends: 309 [2021-11-06 23:36:46,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:36:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-06 23:36:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-11-06 23:36:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 303 states have (on average 1.2805280528052805) internal successors, (388), 308 states have internal predecessors, (388), 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 23:36:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 388 transitions. [2021-11-06 23:36:46,235 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 388 transitions. Word has length 71 [2021-11-06 23:36:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:46,235 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 388 transitions. [2021-11-06 23:36:46,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 23:36:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 388 transitions. [2021-11-06 23:36:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 23:36:46,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:46,236 INFO L513 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, 1, 1] [2021-11-06 23:36:46,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-06 23:36:46,449 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 23:36:46,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:46,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1065048653, now seen corresponding path program 1 times [2021-11-06 23:36:46,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:46,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267500535] [2021-11-06 23:36:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:46,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:46,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:46,455 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 23:36:46,458 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 23:36:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:46,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 23:36:46,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:46,915 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 23:36:46,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:47,075 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 23:36:47,075 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:47,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267500535] [2021-11-06 23:36:47,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267500535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 23:36:47,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 23:36:47,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-06 23:36:47,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801616196] [2021-11-06 23:36:47,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 23:36:47,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:47,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 23:36:47,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 23:36:47,076 INFO L87 Difference]: Start difference. First operand 309 states and 388 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 23:36:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:47,310 INFO L93 Difference]: Finished difference Result 579 states and 739 transitions. [2021-11-06 23:36:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 23:36:47,311 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 74 [2021-11-06 23:36:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:47,312 INFO L225 Difference]: With dead ends: 579 [2021-11-06 23:36:47,312 INFO L226 Difference]: Without dead ends: 315 [2021-11-06 23:36:47,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-06 23:36:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-06 23:36:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-11-06 23:36:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.2750809061488673) internal successors, (394), 314 states have internal predecessors, (394), 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 23:36:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 394 transitions. [2021-11-06 23:36:47,318 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 394 transitions. Word has length 74 [2021-11-06 23:36:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:47,318 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 394 transitions. [2021-11-06 23:36:47,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 23:36:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 394 transitions. [2021-11-06 23:36:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-06 23:36:47,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:47,319 INFO L513 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] [2021-11-06 23:36:47,330 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 23:36:47,530 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 23:36:47,533 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:47,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1820271245, now seen corresponding path program 2 times [2021-11-06 23:36:47,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:47,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781896095] [2021-11-06 23:36:47,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 23:36:47,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:47,535 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 23:36:47,537 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 23:36:47,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 23:36:47,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:36:47,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:47,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:47,894 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 23:36:47,905 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 23:36:47,922 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 23:36:47,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:48,038 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 23:36:48,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:48,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781896095] [2021-11-06 23:36:48,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781896095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:48,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:48,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-06 23:36:48,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198086684] [2021-11-06 23:36:48,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 23:36:48,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:48,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 23:36:48,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 23:36:48,039 INFO L87 Difference]: Start difference. First operand 315 states and 394 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 23:36:51,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:51,333 INFO L93 Difference]: Finished difference Result 490 states and 625 transitions. [2021-11-06 23:36:51,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 23:36:51,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 80 [2021-11-06 23:36:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:51,336 INFO L225 Difference]: With dead ends: 490 [2021-11-06 23:36:51,336 INFO L226 Difference]: Without dead ends: 465 [2021-11-06 23:36:51,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 23:36:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-06 23:36:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 386. [2021-11-06 23:36:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 380 states have (on average 1.2894736842105263) internal successors, (490), 385 states have internal predecessors, (490), 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 23:36:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 490 transitions. [2021-11-06 23:36:51,343 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 490 transitions. Word has length 80 [2021-11-06 23:36:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:51,344 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 490 transitions. [2021-11-06 23:36:51,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 23:36:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 490 transitions. [2021-11-06 23:36:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-06 23:36:51,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:51,345 INFO L513 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 23:36:51,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-06 23:36:51,545 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 23:36:51,546 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1224331210, now seen corresponding path program 1 times [2021-11-06 23:36:51,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:51,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48196794] [2021-11-06 23:36:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:51,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:51,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:51,549 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 23:36:51,550 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 23:36:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:51,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 23:36:51,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:52,180 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 23:36:52,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:52,609 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 23:36:52,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:52,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48196794] [2021-11-06 23:36:52,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48196794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 23:36:52,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 23:36:52,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-06 23:36:52,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160627360] [2021-11-06 23:36:52,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 23:36:52,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 23:36:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-06 23:36:52,611 INFO L87 Difference]: Start difference. First operand 386 states and 490 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 23:36:53,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:53,883 INFO L93 Difference]: Finished difference Result 739 states and 955 transitions. [2021-11-06 23:36:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 23:36:53,884 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 23:36:53,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:53,885 INFO L225 Difference]: With dead ends: 739 [2021-11-06 23:36:53,885 INFO L226 Difference]: Without dead ends: 398 [2021-11-06 23:36:53,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-06 23:36:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-06 23:36:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-11-06 23:36:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 392 states have (on average 1.280612244897959) internal successors, (502), 397 states have internal predecessors, (502), 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 23:36:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 502 transitions. [2021-11-06 23:36:53,893 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 502 transitions. Word has length 112 [2021-11-06 23:36:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:53,893 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 502 transitions. [2021-11-06 23:36:53,893 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 23:36:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 502 transitions. [2021-11-06 23:36:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-06 23:36:53,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:53,894 INFO L513 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 23:36:53,908 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 23:36:54,106 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 23:36:54,107 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:54,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2016870474, now seen corresponding path program 2 times [2021-11-06 23:36:54,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:54,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478043660] [2021-11-06 23:36:54,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 23:36:54,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:54,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:54,109 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 23:36:54,124 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 23:36:54,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 23:36:54,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:36:54,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:36:54,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:54,667 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 23:36:54,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:54,862 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 23:36:54,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:54,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478043660] [2021-11-06 23:36:54,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478043660] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 23:36:54,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:36:54,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-06 23:36:54,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327797521] [2021-11-06 23:36:54,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 23:36:54,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:54,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 23:36:54,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:36:54,863 INFO L87 Difference]: Start difference. First operand 398 states and 502 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 23:36:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:36:54,980 INFO L93 Difference]: Finished difference Result 645 states and 838 transitions. [2021-11-06 23:36:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:36:54,981 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 23:36:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:36:54,982 INFO L225 Difference]: With dead ends: 645 [2021-11-06 23:36:54,982 INFO L226 Difference]: Without dead ends: 410 [2021-11-06 23:36:54,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-06 23:36:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-06 23:36:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 407. [2021-11-06 23:36:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 401 states have (on average 1.2144638403990025) internal successors, (487), 406 states have internal predecessors, (487), 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 23:36:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 487 transitions. [2021-11-06 23:36:54,991 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 487 transitions. Word has length 124 [2021-11-06 23:36:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:36:54,991 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 487 transitions. [2021-11-06 23:36:54,991 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 23:36:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 487 transitions. [2021-11-06 23:36:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-06 23:36:54,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:36:54,994 INFO L513 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 23:36:55,013 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 23:36:55,203 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 23:36:55,204 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:36:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:36:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1333208362, now seen corresponding path program 1 times [2021-11-06 23:36:55,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:36:55,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336724335] [2021-11-06 23:36:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:36:55,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:36:55,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:36:55,206 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 23:36:55,207 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 23:36:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:36:55,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 23:36:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:36:56,135 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 23:36:56,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:36:57,114 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 23:36:57,115 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:36:57,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336724335] [2021-11-06 23:36:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336724335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 23:36:57,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 23:36:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-06 23:36:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470595590] [2021-11-06 23:36:57,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-06 23:36:57,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:36:57,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-06 23:36:57,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-06 23:36:57,116 INFO L87 Difference]: Start difference. First operand 407 states and 487 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 23:37:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:37:05,569 INFO L93 Difference]: Finished difference Result 793 states and 973 transitions. [2021-11-06 23:37:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-06 23:37:05,569 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 23:37:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:37:05,570 INFO L225 Difference]: With dead ends: 793 [2021-11-06 23:37:05,570 INFO L226 Difference]: Without dead ends: 431 [2021-11-06 23:37:05,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-06 23:37:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-06 23:37:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2021-11-06 23:37:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 425 states have (on average 1.2023529411764706) internal successors, (511), 430 states have internal predecessors, (511), 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 23:37:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 511 transitions. [2021-11-06 23:37:05,588 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 511 transitions. Word has length 124 [2021-11-06 23:37:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:37:05,588 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 511 transitions. [2021-11-06 23:37:05,588 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 23:37:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 511 transitions. [2021-11-06 23:37:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 23:37:05,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:37:05,596 INFO L513 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 23:37:05,610 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 23:37:05,809 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 23:37:05,809 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:37:05,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:37:05,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2039593942, now seen corresponding path program 2 times [2021-11-06 23:37:05,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:37:05,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146552449] [2021-11-06 23:37:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 23:37:05,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:37:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:37:05,811 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 23:37:05,812 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 23:37:06,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 23:37:06,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:37:06,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 23:37:06,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:37:06,460 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 23:37:06,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:37:06,687 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 23:37:06,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:37:06,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146552449] [2021-11-06 23:37:06,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146552449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 23:37:06,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:37:06,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 5 [2021-11-06 23:37:06,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509701038] [2021-11-06 23:37:06,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 23:37:06,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:37:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 23:37:06,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:37:06,688 INFO L87 Difference]: Start difference. First operand 431 states and 511 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 23:37:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:37:06,765 INFO L93 Difference]: Finished difference Result 653 states and 785 transitions. [2021-11-06 23:37:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:37:06,766 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 23:37:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:37:06,768 INFO L225 Difference]: With dead ends: 653 [2021-11-06 23:37:06,768 INFO L226 Difference]: Without dead ends: 434 [2021-11-06 23:37:06,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:37:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-06 23:37:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 431. [2021-11-06 23:37:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 425 states have (on average 1.1811764705882353) internal successors, (502), 430 states have internal predecessors, (502), 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 23:37:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 502 transitions. [2021-11-06 23:37:06,784 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 502 transitions. Word has length 148 [2021-11-06 23:37:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:37:06,784 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 502 transitions. [2021-11-06 23:37:06,785 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 23:37:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 502 transitions. [2021-11-06 23:37:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 23:37:06,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:37:06,786 INFO L513 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 23:37:06,808 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 23:37:06,994 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 23:37:06,995 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:37:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:37:06,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1997207916, now seen corresponding path program 1 times [2021-11-06 23:37:06,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:37:06,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771617475] [2021-11-06 23:37:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:37:06,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:37:06,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:37:06,997 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 23:37:06,998 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 23:37:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:37:07,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-06 23:37:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:37:08,688 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 23:37:08,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:37:11,447 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 23:37:11,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:37:11,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771617475] [2021-11-06 23:37:11,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771617475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 23:37:11,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 23:37:11,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2021-11-06 23:37:11,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038526217] [2021-11-06 23:37:11,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-06 23:37:11,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:37:11,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-06 23:37:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=3099, Unknown=0, NotChecked=0, Total=4032 [2021-11-06 23:37:11,469 INFO L87 Difference]: Start difference. First operand 431 states and 502 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 23:38:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:38:12,686 INFO L93 Difference]: Finished difference Result 847 states and 1015 transitions. [2021-11-06 23:38:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-06 23:38:12,687 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 23:38:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:38:12,688 INFO L225 Difference]: With dead ends: 847 [2021-11-06 23:38:12,689 INFO L226 Difference]: Without dead ends: 461 [2021-11-06 23:38:12,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=2700, Invalid=6042, Unknown=0, NotChecked=0, Total=8742 [2021-11-06 23:38:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-06 23:38:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2021-11-06 23:38:12,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 455 states have (on average 1.1692307692307693) internal successors, (532), 460 states have internal predecessors, (532), 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 23:38:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 532 transitions. [2021-11-06 23:38:12,708 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 532 transitions. Word has length 148 [2021-11-06 23:38:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:38:12,708 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 532 transitions. [2021-11-06 23:38:12,709 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 23:38:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 532 transitions. [2021-11-06 23:38:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-06 23:38:12,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:38:12,710 INFO L513 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 23:38:12,754 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 23:38:12,926 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 23:38:12,926 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:38:12,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:38:12,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1100843980, now seen corresponding path program 2 times [2021-11-06 23:38:12,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:38:12,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960641925] [2021-11-06 23:38:12,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 23:38:12,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:38:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:38:12,929 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 23:38:12,931 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 23:38:14,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 23:38:14,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:38:14,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 23:38:14,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:38:15,281 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 23:38:15,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:38:18,684 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 23:38:18,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:38:18,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960641925] [2021-11-06 23:38:18,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960641925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 23:38:18,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 23:38:18,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-06 23:38:18,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891810817] [2021-11-06 23:38:18,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-06 23:38:18,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:38:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-06 23:38:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2021-11-06 23:38:18,687 INFO L87 Difference]: Start difference. First operand 461 states and 532 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 23:39:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:39:34,066 INFO L93 Difference]: Finished difference Result 910 states and 1081 transitions. [2021-11-06 23:39:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-06 23:39:34,067 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 23:39:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:39:34,069 INFO L225 Difference]: With dead ends: 910 [2021-11-06 23:39:34,069 INFO L226 Difference]: Without dead ends: 494 [2021-11-06 23:39:34,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=3199, Invalid=6113, Unknown=0, NotChecked=0, Total=9312 [2021-11-06 23:39:34,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-06 23:39:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 494. [2021-11-06 23:39:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 488 states have (on average 1.1577868852459017) internal successors, (565), 493 states have internal predecessors, (565), 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 23:39:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 565 transitions. [2021-11-06 23:39:34,095 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 565 transitions. Word has length 178 [2021-11-06 23:39:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:39:34,095 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 565 transitions. [2021-11-06 23:39:34,095 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 23:39:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 565 transitions. [2021-11-06 23:39:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-06 23:39:34,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:39:34,100 INFO L513 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 23:39:34,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-06 23:39:34,317 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 23:39:34,318 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:39:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:39:34,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1145284768, now seen corresponding path program 3 times [2021-11-06 23:39:34,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:39:34,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949503863] [2021-11-06 23:39:34,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 23:39:34,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:39:34,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:39:34,321 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 23:39:34,327 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 23:39:35,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 23:39:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:39:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:39:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:39:35,601 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 23:39:35,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:39:36,090 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 23:39:36,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:39:36,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949503863] [2021-11-06 23:39:36,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949503863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-06 23:39:36,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:39:36,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-06 23:39:36,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105368488] [2021-11-06 23:39:36,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:39:36,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:39:36,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:39:36,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:39:36,093 INFO L87 Difference]: Start difference. First operand 494 states and 565 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 23:39:40,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:39:40,078 INFO L93 Difference]: Finished difference Result 1070 states and 1232 transitions. [2021-11-06 23:39:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 23:39:40,079 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 23:39:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:39:40,081 INFO L225 Difference]: With dead ends: 1070 [2021-11-06 23:39:40,081 INFO L226 Difference]: Without dead ends: 621 [2021-11-06 23:39:40,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:39:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-11-06 23:39:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 569. [2021-11-06 23:39:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 563 states have (on average 1.1580817051509769) internal successors, (652), 568 states have internal predecessors, (652), 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 23:39:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 652 transitions. [2021-11-06 23:39:40,106 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 652 transitions. Word has length 211 [2021-11-06 23:39:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:39:40,106 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 652 transitions. [2021-11-06 23:39:40,106 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 23:39:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 652 transitions. [2021-11-06 23:39:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-06 23:39:40,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:39:40,108 INFO L513 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 23:39:40,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-06 23:39:40,320 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 23:39:40,320 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:39:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:39:40,321 INFO L85 PathProgramCache]: Analyzing trace with hash 670931834, now seen corresponding path program 1 times [2021-11-06 23:39:40,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:39:40,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767352054] [2021-11-06 23:39:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:39:40,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:39:40,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:39:40,324 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 23:39:40,325 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 23:39:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:39:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-06 23:39:41,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:39:44,809 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 23:39:44,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:39:56,597 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 23:39:56,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:39:56,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767352054] [2021-11-06 23:39:56,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767352054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 23:39:56,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 23:39:56,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2021-11-06 23:39:56,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78499925] [2021-11-06 23:39:56,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-06 23:39:56,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:39:56,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-06 23:39:56,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4486, Invalid=12806, Unknown=0, NotChecked=0, Total=17292 [2021-11-06 23:39:56,602 INFO L87 Difference]: Start difference. First operand 569 states and 652 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 23:43:26,239 WARN L207 SmtUtils]: Spent 5.17 s on a formula simplification that was a NOOP. DAG size: 196 [2021-11-06 23:43:33,588 WARN L207 SmtUtils]: Spent 5.03 s on a formula simplification that was a NOOP. DAG size: 193 [2021-11-06 23:43:54,520 WARN L207 SmtUtils]: Spent 5.61 s on a formula simplification that was a NOOP. DAG size: 184 [2021-11-06 23:44:02,619 WARN L207 SmtUtils]: Spent 5.27 s on a formula simplification that was a NOOP. DAG size: 181 [2021-11-06 23:44:10,338 WARN L207 SmtUtils]: Spent 5.24 s on a formula simplification that was a NOOP. DAG size: 178 [2021-11-06 23:45:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:45:30,688 INFO L93 Difference]: Finished difference Result 1045 states and 1271 transitions. [2021-11-06 23:45:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-06 23:45:30,689 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 23:45:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:45:30,706 INFO L225 Difference]: With dead ends: 1045 [2021-11-06 23:45:30,706 INFO L226 Difference]: Without dead ends: 635 [2021-11-06 23:45:30,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 228.7s TimeCoverageRelationStatistics Valid=12934, Invalid=25286, Unknown=0, NotChecked=0, Total=38220 [2021-11-06 23:45:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-06 23:45:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2021-11-06 23:45:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 629 states have (on average 1.1414944356120826) internal successors, (718), 634 states have internal predecessors, (718), 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 23:45:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 718 transitions. [2021-11-06 23:45:30,793 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 718 transitions. Word has length 218 [2021-11-06 23:45:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:45:30,794 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 718 transitions. [2021-11-06 23:45:30,794 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 23:45:30,794 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 718 transitions. [2021-11-06 23:45:30,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-06 23:45:30,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:45:30,796 INFO L513 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 23:45:30,826 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 23:45:30,996 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 23:45:30,996 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 23:45:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:45:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash 249759226, now seen corresponding path program 2 times [2021-11-06 23:45:30,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-06 23:45:30,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979839190] [2021-11-06 23:45:30,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 23:45:30,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-06 23:45:30,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-06 23:45:30,999 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 23:45:31,013 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 23:45:33,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 23:45:33,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:45:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-06 23:45:33,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:45:42,453 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 23:45:42,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-06 23:46:31,329 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 23:46:31,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-06 23:46:31,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979839190] [2021-11-06 23:46:31,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979839190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-06 23:46:31,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 23:46:31,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 264 [2021-11-06 23:46:31,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072767898] [2021-11-06 23:46:31,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 264 states [2021-11-06 23:46:31,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-06 23:46:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 264 interpolants. [2021-11-06 23:46:31,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17686, Invalid=51746, Unknown=0, NotChecked=0, Total=69432 [2021-11-06 23:46:31,366 INFO L87 Difference]: Start difference. First operand 635 states and 718 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