./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-optional-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/forester-heap/dll-optional-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 e6a59c2161f6b6239c5a03a0c424da05f95a5e0e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/forester-heap/dll-optional-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 e6a59c2161f6b6239c5a03a0c424da05f95a5e0e ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 09:08:55,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 09:08:55,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 09:08:55,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 09:08:55,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 09:08:55,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 09:08:55,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 09:08:55,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 09:08:55,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 09:08:55,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 09:08:55,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 09:08:55,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 09:08:55,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 09:08:55,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 09:08:55,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 09:08:55,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 09:08:55,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 09:08:55,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 09:08:55,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 09:08:55,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 09:08:55,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 09:08:55,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 09:08:55,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 09:08:55,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 09:08:55,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 09:08:55,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 09:08:55,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 09:08:55,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 09:08:55,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 09:08:55,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 09:08:55,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 09:08:55,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 09:08:55,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 09:08:55,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 09:08:55,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 09:08:55,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 09:08:55,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 09:08:55,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 09:08:55,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 09:08:55,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 09:08:55,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 09:08:55,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 09:08:55,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 09:08:55,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 09:08:55,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 09:08:55,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 09:08:55,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 09:08:55,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 09:08:55,461 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 09:08:55,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 09:08:55,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 09:08:55,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 09:08:55,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 09:08:55,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 09:08:55,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 09:08:55,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 09:08:55,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 09:08:55,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 09:08:55,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 09:08:55,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 09:08:55,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 09:08:55,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 09:08:55,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 09:08:55,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 09:08:55,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:08:55,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 09:08:55,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 09:08:55,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 09:08:55,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 09:08:55,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 09:08:55,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 09:08:55,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 09:08:55,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6a59c2161f6b6239c5a03a0c424da05f95a5e0e [2021-08-29 09:08:55,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 09:08:55,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 09:08:55,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 09:08:55,784 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 09:08:55,784 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 09:08:55,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-08-29 09:08:55,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc9e865f/c00ed90afa594e079f123522b778b1f8/FLAGc2f19a378 [2021-08-29 09:08:56,316 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 09:08:56,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-08-29 09:08:56,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc9e865f/c00ed90afa594e079f123522b778b1f8/FLAGc2f19a378 [2021-08-29 09:08:56,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc9e865f/c00ed90afa594e079f123522b778b1f8 [2021-08-29 09:08:56,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 09:08:56,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 09:08:56,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 09:08:56,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 09:08:56,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 09:08:56,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cbdeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56, skipping insertion in model container [2021-08-29 09:08:56,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 09:08:56,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 09:08:56,563 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/forester-heap/dll-optional-1.i[22753,22766] [2021-08-29 09:08:56,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:08:56,574 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 09:08:56,613 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/forester-heap/dll-optional-1.i[22753,22766] [2021-08-29 09:08:56,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:08:56,643 INFO L208 MainTranslator]: Completed translation [2021-08-29 09:08:56,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56 WrapperNode [2021-08-29 09:08:56,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 09:08:56,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 09:08:56,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 09:08:56,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 09:08:56,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 09:08:56,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 09:08:56,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 09:08:56,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 09:08:56,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 09:08:56,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 09:08:56,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 09:08:56,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 09:08:56,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (1/1) ... [2021-08-29 09:08:56,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:08:56,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:08:56,814 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) [2021-08-29 09:08:56,840 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 [2021-08-29 09:08:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 09:08:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 09:08:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 09:08:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-29 09:08:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 09:08:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-29 09:08:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 09:08:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 09:08:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 09:08:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 09:08:57,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 09:08:57,187 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-29 09:08:57,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:08:57 BoogieIcfgContainer [2021-08-29 09:08:57,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 09:08:57,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 09:08:57,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 09:08:57,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 09:08:57,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:08:56" (1/3) ... [2021-08-29 09:08:57,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f01fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:08:57, skipping insertion in model container [2021-08-29 09:08:57,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:08:56" (2/3) ... [2021-08-29 09:08:57,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f01fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:08:57, skipping insertion in model container [2021-08-29 09:08:57,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:08:57" (3/3) ... [2021-08-29 09:08:57,197 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2021-08-29 09:08:57,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 09:08:57,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 09:08:57,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 09:08:57,253 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-29 09:08:57,254 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 09:08:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 09:08:57,277 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:08:57,277 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:08:57,278 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:08:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:08:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash 573386926, now seen corresponding path program 1 times [2021-08-29 09:08:57,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:08:57,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322729208] [2021-08-29 09:08:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:08:57,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:08:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:08:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:08:57,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:08:57,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322729208] [2021-08-29 09:08:57,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322729208] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:08:57,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:08:57,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 09:08:57,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121338834] [2021-08-29 09:08:57,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 09:08:57,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:08:57,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 09:08:57,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:08:57,509 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2021-08-29 09:08:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:08:57,625 INFO L93 Difference]: Finished difference Result 51 states and 77 transitions. [2021-08-29 09:08:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 09:08:57,629 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 15 [2021-08-29 09:08:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:08:57,636 INFO L225 Difference]: With dead ends: 51 [2021-08-29 09:08:57,636 INFO L226 Difference]: Without dead ends: 22 [2021-08-29 09:08:57,640 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:08:57,645 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.84ms IncrementalHoareTripleChecker+Time [2021-08-29 09:08:57,646 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.40ms Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 100.84ms Time] [2021-08-29 09:08:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-29 09:08:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-29 09:08:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-08-29 09:08:57,675 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 15 [2021-08-29 09:08:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:08:57,675 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-08-29 09:08:57,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2021-08-29 09:08:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-08-29 09:08:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:08:57,677 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:08:57,677 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:08:57,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 09:08:57,678 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:08:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:08:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1170055612, now seen corresponding path program 1 times [2021-08-29 09:08:57,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:08:57,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732972399] [2021-08-29 09:08:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:08:57,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:08:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:08:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:08:57,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:08:57,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732972399] [2021-08-29 09:08:57,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732972399] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:08:57,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:08:57,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 09:08:57,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924722690] [2021-08-29 09:08:57,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 09:08:57,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:08:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 09:08:57,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 09:08:57,785 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:08:57,900 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-08-29 09:08:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 09:08:57,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-29 09:08:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:08:57,901 INFO L225 Difference]: With dead ends: 37 [2021-08-29 09:08:57,901 INFO L226 Difference]: Without dead ends: 25 [2021-08-29 09:08:57,905 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.55ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 09:08:57,907 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.55ms IncrementalHoareTripleChecker+Time [2021-08-29 09:08:57,907 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 94.55ms Time] [2021-08-29 09:08:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-29 09:08:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-08-29 09:08:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-08-29 09:08:57,919 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 16 [2021-08-29 09:08:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:08:57,920 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-08-29 09:08:57,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-08-29 09:08:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:08:57,922 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:08:57,922 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:08:57,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 09:08:57,923 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:08:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:08:57,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1170053690, now seen corresponding path program 1 times [2021-08-29 09:08:57,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:08:57,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615343698] [2021-08-29 09:08:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:08:57,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:08:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:08:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:08:58,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:08:58,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615343698] [2021-08-29 09:08:58,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615343698] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:08:58,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:08:58,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 09:08:58,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801208067] [2021-08-29 09:08:58,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 09:08:58,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:08:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 09:08:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 09:08:58,059 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:08:58,272 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-08-29 09:08:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 09:08:58,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-29 09:08:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:08:58,273 INFO L225 Difference]: With dead ends: 41 [2021-08-29 09:08:58,273 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 09:08:58,274 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.57ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-29 09:08:58,275 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.46ms IncrementalHoareTripleChecker+Time [2021-08-29 09:08:58,275 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 162 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 170.46ms Time] [2021-08-29 09:08:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 09:08:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-08-29 09:08:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-08-29 09:08:58,279 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 16 [2021-08-29 09:08:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:08:58,280 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-08-29 09:08:58,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-08-29 09:08:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:08:58,281 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:08:58,281 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:08:58,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 09:08:58,281 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:08:58,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:08:58,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1171900732, now seen corresponding path program 1 times [2021-08-29 09:08:58,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:08:58,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438648866] [2021-08-29 09:08:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:08:58,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:08:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:08:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:08:58,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:08:58,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438648866] [2021-08-29 09:08:58,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438648866] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:08:58,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:08:58,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 09:08:58,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395267261] [2021-08-29 09:08:58,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 09:08:58,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:08:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 09:08:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-29 09:08:58,419 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:08:58,728 INFO L93 Difference]: Finished difference Result 93 states and 115 transitions. [2021-08-29 09:08:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 09:08:58,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-29 09:08:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:08:58,729 INFO L225 Difference]: With dead ends: 93 [2021-08-29 09:08:58,729 INFO L226 Difference]: Without dead ends: 74 [2021-08-29 09:08:58,730 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 123.23ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:08:58,730 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.62ms IncrementalHoareTripleChecker+Time [2021-08-29 09:08:58,731 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 182 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 195.62ms Time] [2021-08-29 09:08:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-29 09:08:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2021-08-29 09:08:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2021-08-29 09:08:58,740 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 16 [2021-08-29 09:08:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:08:58,740 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2021-08-29 09:08:58,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2021-08-29 09:08:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:08:58,742 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:08:58,742 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:08:58,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 09:08:58,743 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:08:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:08:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash 604953672, now seen corresponding path program 1 times [2021-08-29 09:08:58,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:08:58,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683241493] [2021-08-29 09:08:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:08:58,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:08:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:08:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:08:58,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:08:58,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683241493] [2021-08-29 09:08:58,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683241493] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:08:58,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:08:58,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 09:08:58,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193531282] [2021-08-29 09:08:58,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 09:08:58,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:08:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 09:08:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-29 09:08:58,847 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:08:59,023 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2021-08-29 09:08:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 09:08:59,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-29 09:08:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:08:59,024 INFO L225 Difference]: With dead ends: 87 [2021-08-29 09:08:59,024 INFO L226 Difference]: Without dead ends: 64 [2021-08-29 09:08:59,025 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.67ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-29 09:08:59,025 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.98ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.87ms IncrementalHoareTripleChecker+Time [2021-08-29 09:08:59,026 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 153 Unknown, 0 Unchecked, 2.98ms Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 138.87ms Time] [2021-08-29 09:08:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-29 09:08:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2021-08-29 09:08:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-08-29 09:08:59,031 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2021-08-29 09:08:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:08:59,031 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-08-29 09:08:59,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-08-29 09:08:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 09:08:59,032 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:08:59,032 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:08:59,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 09:08:59,039 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:08:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:08:59,042 INFO L82 PathProgramCache]: Analyzing trace with hash 466614784, now seen corresponding path program 1 times [2021-08-29 09:08:59,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:08:59,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956363447] [2021-08-29 09:08:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:08:59,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:08:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:08:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:08:59,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:08:59,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956363447] [2021-08-29 09:08:59,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956363447] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:08:59,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:08:59,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 09:08:59,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336158005] [2021-08-29 09:08:59,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 09:08:59,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:08:59,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 09:08:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-29 09:08:59,140 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:08:59,473 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2021-08-29 09:08:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 09:08:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-08-29 09:08:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:08:59,474 INFO L225 Difference]: With dead ends: 105 [2021-08-29 09:08:59,474 INFO L226 Difference]: Without dead ends: 86 [2021-08-29 09:08:59,475 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 75.53ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:08:59,476 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 245.38ms IncrementalHoareTripleChecker+Time [2021-08-29 09:08:59,476 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [9 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 245.38ms Time] [2021-08-29 09:08:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-29 09:08:59,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 48. [2021-08-29 09:08:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-08-29 09:08:59,483 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 17 [2021-08-29 09:08:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:08:59,484 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-08-29 09:08:59,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-08-29 09:08:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 09:08:59,485 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:08:59,485 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:08:59,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-29 09:08:59,485 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:08:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:08:59,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2051498108, now seen corresponding path program 1 times [2021-08-29 09:08:59,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:08:59,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338510904] [2021-08-29 09:08:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:08:59,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:08:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:08:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:08:59,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:08:59,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338510904] [2021-08-29 09:08:59,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338510904] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:08:59,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:08:59,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 09:08:59,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638558034] [2021-08-29 09:08:59,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 09:08:59,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:08:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 09:08:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 09:08:59,542 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:08:59,716 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2021-08-29 09:08:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 09:08:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-08-29 09:08:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:08:59,717 INFO L225 Difference]: With dead ends: 84 [2021-08-29 09:08:59,717 INFO L226 Difference]: Without dead ends: 82 [2021-08-29 09:08:59,717 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.83ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-29 09:08:59,718 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.51ms IncrementalHoareTripleChecker+Time [2021-08-29 09:08:59,718 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 187 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 145.51ms Time] [2021-08-29 09:08:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-29 09:08:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 48. [2021-08-29 09:08:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-08-29 09:08:59,726 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 17 [2021-08-29 09:08:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:08:59,727 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-08-29 09:08:59,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:08:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-08-29 09:08:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 09:08:59,728 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:08:59,728 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:08:59,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-29 09:08:59,728 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:08:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:08:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1690516158, now seen corresponding path program 1 times [2021-08-29 09:08:59,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:08:59,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107071852] [2021-08-29 09:08:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:08:59,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:08:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:00,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:09:00,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107071852] [2021-08-29 09:09:00,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107071852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:09:00,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715978536] [2021-08-29 09:09:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:00,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:09:00,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:09:00,177 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) [2021-08-29 09:09:00,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 09:09:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:00,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-29 09:09:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:00,356 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 [2021-08-29 09:09:00,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:00,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 64 [2021-08-29 09:09:00,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:00,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 64 [2021-08-29 09:09:00,442 INFO L354 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2021-08-29 09:09:00,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 68 [2021-08-29 09:09:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:00,666 INFO L354 Elim1Store]: treesize reduction 166, result has 18.2 percent of original size [2021-08-29 09:09:00,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 190 [2021-08-29 09:09:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:00,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:00,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:00,733 INFO L354 Elim1Store]: treesize reduction 120, result has 22.6 percent of original size [2021-08-29 09:09:00,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 156 treesize of output 113 [2021-08-29 09:09:00,765 INFO L354 Elim1Store]: treesize reduction 84, result has 31.7 percent of original size [2021-08-29 09:09:00,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 135 treesize of output 156 [2021-08-29 09:09:00,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:00,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:01,084 INFO L354 Elim1Store]: treesize reduction 208, result has 17.5 percent of original size [2021-08-29 09:09:01,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 309 treesize of output 228 [2021-08-29 09:09:01,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:01,220 INFO L354 Elim1Store]: treesize reduction 274, result has 16.2 percent of original size [2021-08-29 09:09:01,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 287 treesize of output 207 [2021-08-29 09:09:01,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:01,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:01,384 INFO L354 Elim1Store]: treesize reduction 909, result has 8.5 percent of original size [2021-08-29 09:09:01,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 275 treesize of output 262 [2021-08-29 09:09:01,424 INFO L354 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2021-08-29 09:09:01,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 258 [2021-08-29 09:09:03,449 INFO L354 Elim1Store]: treesize reduction 245, result has 8.2 percent of original size [2021-08-29 09:09:03,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 295 treesize of output 175 [2021-08-29 09:09:03,489 INFO L354 Elim1Store]: treesize reduction 236, result has 1.3 percent of original size [2021-08-29 09:09:03,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 146 treesize of output 106 [2021-08-29 09:09:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:03,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:09:15,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-29 09:09:15,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-29 09:09:15,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-29 09:09:15,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095932531] [2021-08-29 09:09:15,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 09:09:15,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:09:15,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 09:09:15,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=378, Unknown=4, NotChecked=0, Total=462 [2021-08-29 09:09:15,162 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:09:17,360 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2021-08-29 09:09:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-29 09:09:17,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-08-29 09:09:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:09:17,361 INFO L225 Difference]: With dead ends: 94 [2021-08-29 09:09:17,361 INFO L226 Difference]: Without dead ends: 75 [2021-08-29 09:09:17,361 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 12625.69ms TimeCoverageRelationStatistics Valid=200, Invalid=852, Unknown=4, NotChecked=0, Total=1056 [2021-08-29 09:09:17,362 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 161 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 286.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.59ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 333.12ms IncrementalHoareTripleChecker+Time [2021-08-29 09:09:17,362 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 0 Invalid, 360 Unknown, 0 Unchecked, 2.59ms Time], IncrementalHoareTripleChecker [51 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 333.12ms Time] [2021-08-29 09:09:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-29 09:09:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 51. [2021-08-29 09:09:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.28) internal successors, (64), 50 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) [2021-08-29 09:09:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-08-29 09:09:17,368 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 19 [2021-08-29 09:09:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:09:17,368 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-08-29 09:09:17,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:17,368 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-08-29 09:09:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 09:09:17,369 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:09:17,369 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:09:17,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 09:09:17,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:09:17,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:09:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:09:17,582 INFO L82 PathProgramCache]: Analyzing trace with hash 86338246, now seen corresponding path program 1 times [2021-08-29 09:09:17,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:09:17,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647044994] [2021-08-29 09:09:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:17,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:09:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:17,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:09:17,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647044994] [2021-08-29 09:09:17,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647044994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:09:17,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954806186] [2021-08-29 09:09:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:17,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:09:17,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:09:17,716 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) [2021-08-29 09:09:17,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 09:09:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:17,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-29 09:09:17,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:17,788 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 [2021-08-29 09:09:17,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:17,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 41 [2021-08-29 09:09:17,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:17,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-08-29 09:09:17,818 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-29 09:09:17,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-08-29 09:09:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:17,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:17,977 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-08-29 09:09:17,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-08-29 09:09:17,996 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-08-29 09:09:17,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 57 [2021-08-29 09:09:18,073 INFO L354 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2021-08-29 09:09:18,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 69 [2021-08-29 09:09:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:18,087 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-08-29 09:09:18,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 57 [2021-08-29 09:09:18,105 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-08-29 09:09:18,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 55 [2021-08-29 09:09:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:18,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:09:18,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-08-29 09:09:18,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-29 09:09:18,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-29 09:09:18,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873130583] [2021-08-29 09:09:18,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 09:09:18,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:09:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 09:09:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-29 09:09:18,348 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 09:09:18,349 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 155.30ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-29 09:09:18,350 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-08-29 09:09:18,350 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.01ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-08-29 09:09:18,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 09:09:18,572 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,SelfDestructingSolverStorable8 [2021-08-29 09:09:18,573 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@313a928e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:863) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:779) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-29 09:09:18,577 INFO L158 Benchmark]: Toolchain (without parser) took 22232.15ms. Allocated memory was 67.1MB in the beginning and 119.5MB in the end (delta: 52.4MB). Free memory was 49.0MB in the beginning and 97.9MB in the end (delta: -48.9MB). Peak memory consumption was 3.8MB. Max. memory is 16.1GB. [2021-08-29 09:09:18,577 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:09:18,577 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.99ms. Allocated memory is still 67.1MB. Free memory was 48.8MB in the beginning and 31.7MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-08-29 09:09:18,578 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.70ms. Allocated memory is still 67.1MB. Free memory was 31.5MB in the beginning and 50.5MB in the end (delta: -19.0MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. [2021-08-29 09:09:18,578 INFO L158 Benchmark]: Boogie Preprocessor took 54.48ms. Allocated memory is still 67.1MB. Free memory was 50.5MB in the beginning and 48.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 09:09:18,578 INFO L158 Benchmark]: RCFGBuilder took 409.33ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 35.0MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 09:09:18,578 INFO L158 Benchmark]: TraceAbstraction took 21383.97ms. Allocated memory was 67.1MB in the beginning and 119.5MB in the end (delta: 52.4MB). Free memory was 34.5MB in the beginning and 97.9MB in the end (delta: -63.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:09:18,579 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.99ms. Allocated memory is still 67.1MB. Free memory was 48.8MB in the beginning and 31.7MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 78.70ms. Allocated memory is still 67.1MB. Free memory was 31.5MB in the beginning and 50.5MB in the end (delta: -19.0MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.48ms. Allocated memory is still 67.1MB. Free memory was 50.5MB in the beginning and 48.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 409.33ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 35.0MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 21383.97ms. Allocated memory was 67.1MB in the beginning and 119.5MB in the end (delta: 52.4MB). Free memory was 34.5MB in the beginning and 97.9MB in the end (delta: -63.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@313a928e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@313a928e: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-29 09:09:18,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 09:09:20,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 09:09:20,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 09:09:20,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 09:09:20,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 09:09:20,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 09:09:20,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 09:09:20,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 09:09:20,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 09:09:20,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 09:09:20,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 09:09:20,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 09:09:20,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 09:09:20,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 09:09:20,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 09:09:20,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 09:09:20,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 09:09:20,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 09:09:20,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 09:09:20,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 09:09:20,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 09:09:20,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 09:09:20,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 09:09:20,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 09:09:20,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 09:09:20,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 09:09:20,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 09:09:20,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 09:09:20,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 09:09:20,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 09:09:20,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 09:09:20,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 09:09:20,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 09:09:20,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 09:09:20,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 09:09:20,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 09:09:20,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 09:09:20,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 09:09:20,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 09:09:20,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 09:09:20,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 09:09:20,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-29 09:09:20,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 09:09:20,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 09:09:20,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 09:09:20,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 09:09:20,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 09:09:20,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 09:09:20,550 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 09:09:20,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 09:09:20,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 09:09:20,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 09:09:20,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 09:09:20,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 09:09:20,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 09:09:20,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 09:09:20,552 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-29 09:09:20,552 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-29 09:09:20,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 09:09:20,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 09:09:20,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 09:09:20,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 09:09:20,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 09:09:20,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 09:09:20,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 09:09:20,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:09:20,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 09:09:20,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 09:09:20,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 09:09:20,555 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-29 09:09:20,555 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-29 09:09:20,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 09:09:20,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 09:09:20,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-29 09:09:20,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6a59c2161f6b6239c5a03a0c424da05f95a5e0e [2021-08-29 09:09:20,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 09:09:20,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 09:09:20,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 09:09:20,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 09:09:20,916 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 09:09:20,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-08-29 09:09:20,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/526503c07/0af9242546e04349824db8a190a159f2/FLAG000df5d16 [2021-08-29 09:09:21,503 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 09:09:21,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-optional-1.i [2021-08-29 09:09:21,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/526503c07/0af9242546e04349824db8a190a159f2/FLAG000df5d16 [2021-08-29 09:09:21,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/526503c07/0af9242546e04349824db8a190a159f2 [2021-08-29 09:09:21,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 09:09:21,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 09:09:21,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 09:09:21,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 09:09:21,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 09:09:21,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:09:21" (1/1) ... [2021-08-29 09:09:21,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7441ffdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:21, skipping insertion in model container [2021-08-29 09:09:21,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:09:21" (1/1) ... [2021-08-29 09:09:21,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 09:09:22,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 09:09:22,272 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/forester-heap/dll-optional-1.i[22753,22766] [2021-08-29 09:09:22,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:09:22,290 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 09:09:22,331 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/forester-heap/dll-optional-1.i[22753,22766] [2021-08-29 09:09:22,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:09:22,363 INFO L208 MainTranslator]: Completed translation [2021-08-29 09:09:22,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22 WrapperNode [2021-08-29 09:09:22,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 09:09:22,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 09:09:22,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 09:09:22,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 09:09:22,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 09:09:22,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 09:09:22,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 09:09:22,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 09:09:22,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 09:09:22,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 09:09:22,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 09:09:22,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 09:09:22,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (1/1) ... [2021-08-29 09:09:22,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:09:22,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:09:22,489 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) [2021-08-29 09:09:22,491 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 [2021-08-29 09:09:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-29 09:09:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 09:09:22,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-29 09:09:22,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 09:09:22,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-29 09:09:22,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 09:09:22,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-29 09:09:22,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-29 09:09:22,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 09:09:22,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 09:09:22,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 09:09:22,852 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-29 09:09:22,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:09:22 BoogieIcfgContainer [2021-08-29 09:09:22,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 09:09:22,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 09:09:22,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 09:09:22,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 09:09:22,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:09:21" (1/3) ... [2021-08-29 09:09:22,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c591c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:09:22, skipping insertion in model container [2021-08-29 09:09:22,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:09:22" (2/3) ... [2021-08-29 09:09:22,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c591c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:09:22, skipping insertion in model container [2021-08-29 09:09:22,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:09:22" (3/3) ... [2021-08-29 09:09:22,860 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2021-08-29 09:09:22,864 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 09:09:22,864 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 09:09:22,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 09:09:22,905 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-29 09:09:22,906 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 09:09:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 09:09:22,921 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:09:22,922 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:09:22,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:09:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:09:22,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1712561739, now seen corresponding path program 1 times [2021-08-29 09:09:22,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 09:09:22,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530114342] [2021-08-29 09:09:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:22,945 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 09:09:22,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 09:09:22,948 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) [2021-08-29 09:09:22,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-29 09:09:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:23,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-29 09:09:23,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:23,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:09:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:23,237 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 09:09:23,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530114342] [2021-08-29 09:09:23,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530114342] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 09:09:23,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:09:23,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-29 09:09:23,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896659392] [2021-08-29 09:09:23,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 09:09:23,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 09:09:23,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 09:09:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:09:23,275 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2021-08-29 09:09:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:09:23,481 INFO L93 Difference]: Finished difference Result 50 states and 76 transitions. [2021-08-29 09:09:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 09:09:23,485 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 15 [2021-08-29 09:09:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:09:23,492 INFO L225 Difference]: With dead ends: 50 [2021-08-29 09:09:23,492 INFO L226 Difference]: Without dead ends: 21 [2021-08-29 09:09:23,495 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.14ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:09:23,500 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.96ms IncrementalHoareTripleChecker+Time [2021-08-29 09:09:23,502 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.58ms Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 188.96ms Time] [2021-08-29 09:09:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-29 09:09:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-29 09:09:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2021-08-29 09:09:23,533 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 15 [2021-08-29 09:09:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:09:23,533 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2021-08-29 09:09:23,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2021-08-29 09:09:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2021-08-29 09:09:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 09:09:23,535 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:09:23,535 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:09:23,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-29 09:09:23,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 09:09:23,746 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:09:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:09:23,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1397938948, now seen corresponding path program 1 times [2021-08-29 09:09:23,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 09:09:23,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220587348] [2021-08-29 09:09:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:23,749 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 09:09:23,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 09:09:23,750 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) [2021-08-29 09:09:23,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-29 09:09:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:23,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-29 09:09:23,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:23,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:09:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:23,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 09:09:23,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220587348] [2021-08-29 09:09:23,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220587348] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 09:09:23,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:09:23,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-29 09:09:23,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184863668] [2021-08-29 09:09:23,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 09:09:23,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 09:09:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 09:09:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:09:23,894 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-08-29 09:09:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:09:24,177 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2021-08-29 09:09:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 09:09:24,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2021-08-29 09:09:24,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:09:24,179 INFO L225 Difference]: With dead ends: 24 [2021-08-29 09:09:24,179 INFO L226 Difference]: Without dead ends: 22 [2021-08-29 09:09:24,180 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.35ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:09:24,181 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 240.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 274.23ms IncrementalHoareTripleChecker+Time [2021-08-29 09:09:24,181 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 274.23ms Time] [2021-08-29 09:09:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-29 09:09:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-29 09:09:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-08-29 09:09:24,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 15 [2021-08-29 09:09:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:09:24,186 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-08-29 09:09:24,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-08-29 09:09:24,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-08-29 09:09:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 09:09:24,187 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:09:24,188 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:09:24,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-29 09:09:24,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 09:09:24,406 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:09:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:09:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1397937026, now seen corresponding path program 1 times [2021-08-29 09:09:24,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 09:09:24,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780702973] [2021-08-29 09:09:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:24,408 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 09:09:24,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 09:09:24,409 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) [2021-08-29 09:09:24,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-29 09:09:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 09:09:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:24,521 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 [2021-08-29 09:09:24,584 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-29 09:09:24,584 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 1 case distinctions, treesize of input 78 treesize of output 63 [2021-08-29 09:09:24,612 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-29 09:09:24,612 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 1 case distinctions, treesize of input 63 treesize of output 48 [2021-08-29 09:09:24,631 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-08-29 09:09:24,632 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 57 treesize of output 57 [2021-08-29 09:09:24,912 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-29 09:09:24,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 71 [2021-08-29 09:09:24,947 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-29 09:09:24,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 30 [2021-08-29 09:09:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:24,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:09:25,159 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 288 treesize of output 250 [2021-08-29 09:09:25,172 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-29 09:09:25,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 511 treesize of output 495 [2021-08-29 09:09:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:25,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 09:09:25,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780702973] [2021-08-29 09:09:25,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780702973] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 09:09:25,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:09:25,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-08-29 09:09:25,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77774157] [2021-08-29 09:09:25,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 09:09:25,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 09:09:25,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 09:09:25,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-29 09:09:25,370 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:26,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:09:26,757 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2021-08-29 09:09:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 09:09:26,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 15 [2021-08-29 09:09:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:09:26,758 INFO L225 Difference]: With dead ends: 67 [2021-08-29 09:09:26,758 INFO L226 Difference]: Without dead ends: 54 [2021-08-29 09:09:26,759 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 358.75ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-08-29 09:09:26,759 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 175 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1029.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1141.38ms IncrementalHoareTripleChecker+Time [2021-08-29 09:09:26,760 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 0 Invalid, 195 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [36 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1141.38ms Time] [2021-08-29 09:09:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-29 09:09:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 32. [2021-08-29 09:09:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2021-08-29 09:09:26,765 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 15 [2021-08-29 09:09:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:09:26,766 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2021-08-29 09:09:26,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2021-08-29 09:09:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 09:09:26,767 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:09:26,767 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:09:26,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-29 09:09:26,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 09:09:26,978 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:09:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:09:26,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1396089984, now seen corresponding path program 1 times [2021-08-29 09:09:26,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 09:09:26,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326758359] [2021-08-29 09:09:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:26,980 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 09:09:26,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 09:09:26,981 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) [2021-08-29 09:09:26,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-29 09:09:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 09:09:27,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:27,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:09:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:27,388 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 09:09:27,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326758359] [2021-08-29 09:09:27,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326758359] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 09:09:27,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:09:27,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 11 [2021-08-29 09:09:27,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508816677] [2021-08-29 09:09:27,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 09:09:27,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 09:09:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 09:09:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-29 09:09:27,391 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:09:28,576 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2021-08-29 09:09:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-29 09:09:28,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-29 09:09:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:09:28,577 INFO L225 Difference]: With dead ends: 77 [2021-08-29 09:09:28,577 INFO L226 Difference]: Without dead ends: 75 [2021-08-29 09:09:28,578 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 461.26ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-08-29 09:09:28,579 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 749.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 843.38ms IncrementalHoareTripleChecker+Time [2021-08-29 09:09:28,579 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 215 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [33 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 843.38ms Time] [2021-08-29 09:09:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-29 09:09:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 38. [2021-08-29 09:09:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2021-08-29 09:09:28,586 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 15 [2021-08-29 09:09:28,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:09:28,587 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2021-08-29 09:09:28,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2021-08-29 09:09:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 09:09:28,588 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:09:28,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:09:28,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-29 09:09:28,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 09:09:28,799 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:09:28,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:09:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash 378917378, now seen corresponding path program 1 times [2021-08-29 09:09:28,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 09:09:28,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59623104] [2021-08-29 09:09:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:28,800 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 09:09:28,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 09:09:28,801 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) [2021-08-29 09:09:28,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-29 09:09:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:28,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 09:09:28,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:28,865 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 [2021-08-29 09:09:28,889 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-08-29 09:09:28,890 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 1 case distinctions, treesize of input 55 treesize of output 40 [2021-08-29 09:09:28,905 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-29 09:09:28,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-08-29 09:09:28,925 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-29 09:09:28,925 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 25 treesize of output 25 [2021-08-29 09:09:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:28,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:09:29,039 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-08-29 09:09:29,040 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 1 case distinctions, treesize of input 57 treesize of output 42 [2021-08-29 09:09:29,066 INFO L354 Elim1Store]: treesize reduction 35, result has 23.9 percent of original size [2021-08-29 09:09:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2021-08-29 09:09:29,069 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 14 treesize of output 10 [2021-08-29 09:09:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:29,077 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 09:09:29,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59623104] [2021-08-29 09:09:29,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59623104] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 09:09:29,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:09:29,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-08-29 09:09:29,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952286325] [2021-08-29 09:09:29,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 09:09:29,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 09:09:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 09:09:29,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-29 09:09:29,079 INFO L87 Difference]: Start difference. First operand 38 states and 52 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) [2021-08-29 09:09:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:09:29,722 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2021-08-29 09:09:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 09:09:29,723 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 15 [2021-08-29 09:09:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:09:29,724 INFO L225 Difference]: With dead ends: 79 [2021-08-29 09:09:29,724 INFO L226 Difference]: Without dead ends: 58 [2021-08-29 09:09:29,724 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.39ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-29 09:09:29,725 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 511.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 592.91ms IncrementalHoareTripleChecker+Time [2021-08-29 09:09:29,725 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 149 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [12 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 592.91ms Time] [2021-08-29 09:09:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-29 09:09:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2021-08-29 09:09:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2021-08-29 09:09:29,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 15 [2021-08-29 09:09:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:09:29,731 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2021-08-29 09:09:29,731 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) [2021-08-29 09:09:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2021-08-29 09:09:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:09:29,732 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:09:29,732 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:09:29,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-29 09:09:29,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 09:09:29,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:09:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:09:29,943 INFO L82 PathProgramCache]: Analyzing trace with hash -513797694, now seen corresponding path program 1 times [2021-08-29 09:09:29,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 09:09:29,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411190425] [2021-08-29 09:09:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:29,944 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 09:09:29,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 09:09:29,945 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) [2021-08-29 09:09:29,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-29 09:09:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 09:09:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:30,021 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 [2021-08-29 09:09:30,026 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 [2021-08-29 09:09:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:30,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:09:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:30,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 09:09:30,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411190425] [2021-08-29 09:09:30,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411190425] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 09:09:30,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:09:30,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2021-08-29 09:09:30,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430127112] [2021-08-29 09:09:30,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 09:09:30,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 09:09:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 09:09:30,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-29 09:09:30,251 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:31,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:09:31,962 INFO L93 Difference]: Finished difference Result 103 states and 138 transitions. [2021-08-29 09:09:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 09:09:31,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 16 [2021-08-29 09:09:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:09:31,968 INFO L225 Difference]: With dead ends: 103 [2021-08-29 09:09:31,968 INFO L226 Difference]: Without dead ends: 86 [2021-08-29 09:09:31,969 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 193.66ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-08-29 09:09:31,969 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1412.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1561.86ms IncrementalHoareTripleChecker+Time [2021-08-29 09:09:31,970 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 351 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [14 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1561.86ms Time] [2021-08-29 09:09:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-29 09:09:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 43. [2021-08-29 09:09:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2021-08-29 09:09:31,978 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 16 [2021-08-29 09:09:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:09:31,978 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2021-08-29 09:09:31,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2021-08-29 09:09:31,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:09:31,979 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:09:31,979 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:09:31,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-29 09:09:32,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 09:09:32,181 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:09:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:09:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1263056710, now seen corresponding path program 1 times [2021-08-29 09:09:32,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 09:09:32,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589191686] [2021-08-29 09:09:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:32,182 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 09:09:32,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 09:09:32,183 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) [2021-08-29 09:09:32,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-29 09:09:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:32,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 09:09:32,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:32,250 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 [2021-08-29 09:09:32,255 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 [2021-08-29 09:09:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:32,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:09:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:32,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 09:09:32,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589191686] [2021-08-29 09:09:32,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589191686] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 09:09:32,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:09:32,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-08-29 09:09:32,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492232141] [2021-08-29 09:09:32,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 09:09:32,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 09:09:32,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 09:09:32,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-29 09:09:32,499 INFO L87 Difference]: Start difference. First operand 43 states and 56 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:09:33,766 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2021-08-29 09:09:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 09:09:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 16 [2021-08-29 09:09:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:09:33,767 INFO L225 Difference]: With dead ends: 78 [2021-08-29 09:09:33,767 INFO L226 Difference]: Without dead ends: 76 [2021-08-29 09:09:33,768 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 115.59ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:09:33,768 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1081.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1192.77ms IncrementalHoareTripleChecker+Time [2021-08-29 09:09:33,769 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 249 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 1192.77ms Time] [2021-08-29 09:09:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-29 09:09:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2021-08-29 09:09:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2021-08-29 09:09:33,775 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 16 [2021-08-29 09:09:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:09:33,776 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2021-08-29 09:09:33,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:09:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2021-08-29 09:09:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 09:09:33,777 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:09:33,777 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:09:33,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-29 09:09:33,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 09:09:33,987 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:09:33,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:09:33,987 INFO L82 PathProgramCache]: Analyzing trace with hash -871782213, now seen corresponding path program 1 times [2021-08-29 09:09:33,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 09:09:33,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292474508] [2021-08-29 09:09:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:09:33,988 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 09:09:33,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 09:09:33,989 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) [2021-08-29 09:09:33,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-29 09:09:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:09:34,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-29 09:09:34,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:09:34,121 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 [2021-08-29 09:09:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:34,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 69 [2021-08-29 09:09:34,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:34,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 69 [2021-08-29 09:09:34,165 INFO L354 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2021-08-29 09:09:34,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 76 [2021-08-29 09:09:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:34,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:34,478 INFO L354 Elim1Store]: treesize reduction 120, result has 22.6 percent of original size [2021-08-29 09:09:34,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 212 treesize of output 169 [2021-08-29 09:09:34,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:34,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:34,544 INFO L354 Elim1Store]: treesize reduction 158, result has 19.0 percent of original size [2021-08-29 09:09:34,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 146 treesize of output 143 [2021-08-29 09:09:34,589 INFO L354 Elim1Store]: treesize reduction 62, result has 37.4 percent of original size [2021-08-29 09:09:34,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 137 treesize of output 160 [2021-08-29 09:09:34,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:35,824 INFO L354 Elim1Store]: treesize reduction 208, result has 17.5 percent of original size [2021-08-29 09:09:35,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 347 treesize of output 266 [2021-08-29 09:09:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:35,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:36,216 INFO L354 Elim1Store]: treesize reduction 274, result has 16.2 percent of original size [2021-08-29 09:09:36,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 325 treesize of output 245 [2021-08-29 09:09:36,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:09:36,440 INFO L354 Elim1Store]: treesize reduction 909, result has 8.5 percent of original size [2021-08-29 09:09:36,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 313 treesize of output 300 [2021-08-29 09:09:36,507 INFO L354 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2021-08-29 09:09:36,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 272 treesize of output 296 [2021-08-29 09:09:39,346 INFO L354 Elim1Store]: treesize reduction 245, result has 8.2 percent of original size [2021-08-29 09:09:39,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 295 treesize of output 175 [2021-08-29 09:09:39,394 INFO L354 Elim1Store]: treesize reduction 236, result has 1.3 percent of original size [2021-08-29 09:09:39,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 146 treesize of output 106 [2021-08-29 09:09:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:09:39,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:10:26,895 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 09:10:26,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292474508] [2021-08-29 09:10:26,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-29 09:10:26,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1549979012] [2021-08-29 09:10:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:10:26,896 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-29 09:10:26,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-29 09:10:26,917 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-29 09:10:26,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-08-29 09:10:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:10:27,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-29 09:10:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:10:27,194 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 [2021-08-29 09:10:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 69 [2021-08-29 09:10:27,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 54 [2021-08-29 09:10:27,252 INFO L354 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2021-08-29 09:10:27,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 76 [2021-08-29 09:10:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,531 INFO L354 Elim1Store]: treesize reduction 124, result has 20.0 percent of original size [2021-08-29 09:10:27,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 247 treesize of output 200 [2021-08-29 09:10:27,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,594 INFO L354 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2021-08-29 09:10:27,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 206 treesize of output 162 [2021-08-29 09:10:27,639 INFO L354 Elim1Store]: treesize reduction 78, result has 36.6 percent of original size [2021-08-29 09:10:27,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 156 treesize of output 183 [2021-08-29 09:10:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:27,927 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-29 09:10:27,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 333 treesize of output 246 [2021-08-29 09:10:27,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:10:28,097 INFO L354 Elim1Store]: treesize reduction 90, result has 25.6 percent of original size [2021-08-29 09:10:28,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 306 treesize of output 222 [2021-08-29 09:10:28,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:28,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:10:28,169 INFO L354 Elim1Store]: treesize reduction 196, result has 17.3 percent of original size [2021-08-29 09:10:28,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 281 treesize of output 268 [2021-08-29 09:10:28,207 INFO L354 Elim1Store]: treesize reduction 56, result has 45.6 percent of original size [2021-08-29 09:10:28,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 242 treesize of output 262 [2021-08-29 09:10:32,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:32,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:10:32,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:10:32,932 INFO L354 Elim1Store]: treesize reduction 76, result has 9.5 percent of original size [2021-08-29 09:10:32,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 27 case distinctions, treesize of input 267 treesize of output 125 [2021-08-29 09:10:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:10:34,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:11:22,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-29 09:11:22,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591293308] [2021-08-29 09:11:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:11:22,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:11:22,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:11:22,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 09:11:22,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 09:11:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:11:22,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-29 09:11:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:11:22,886 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 [2021-08-29 09:11:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:22,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 69 [2021-08-29 09:11:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:22,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 54 [2021-08-29 09:11:22,936 INFO L354 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2021-08-29 09:11:22,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 76 [2021-08-29 09:11:23,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:23,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:23,273 INFO L354 Elim1Store]: treesize reduction 120, result has 22.6 percent of original size [2021-08-29 09:11:23,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 213 treesize of output 170 [2021-08-29 09:11:23,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:23,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:23,355 INFO L354 Elim1Store]: treesize reduction 158, result has 19.0 percent of original size [2021-08-29 09:11:23,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 144 [2021-08-29 09:11:23,403 INFO L354 Elim1Store]: treesize reduction 62, result has 37.4 percent of original size [2021-08-29 09:11:23,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 138 treesize of output 161 [2021-08-29 09:11:23,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:23,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:24,915 INFO L354 Elim1Store]: treesize reduction 208, result has 17.5 percent of original size [2021-08-29 09:11:24,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 350 treesize of output 269 [2021-08-29 09:11:24,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:24,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:25,536 INFO L354 Elim1Store]: treesize reduction 274, result has 16.2 percent of original size [2021-08-29 09:11:25,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 328 treesize of output 248 [2021-08-29 09:11:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:25,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:11:25,778 INFO L354 Elim1Store]: treesize reduction 909, result has 8.5 percent of original size [2021-08-29 09:11:25,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 316 treesize of output 303 [2021-08-29 09:11:25,819 INFO L354 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2021-08-29 09:11:25,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 275 treesize of output 299 [2021-08-29 09:11:28,825 INFO L354 Elim1Store]: treesize reduction 245, result has 8.2 percent of original size [2021-08-29 09:11:28,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 295 treesize of output 175 [2021-08-29 09:11:28,871 INFO L354 Elim1Store]: treesize reduction 236, result has 1.3 percent of original size [2021-08-29 09:11:28,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 146 treesize of output 106 [2021-08-29 09:11:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:11:28,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:12:00,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-29 09:12:00,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:12:00,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-29 09:12:00,971 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-29 09:12:00,971 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-08-29 09:12:00,975 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 09:12:00,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 09:12:01,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-29 09:12:01,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-08-29 09:12:01,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-08-29 09:12:01,590 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 09:12:01,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:12:01 BoogieIcfgContainer [2021-08-29 09:12:01,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 09:12:01,611 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 09:12:01,611 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 09:12:01,611 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 09:12:01,611 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:09:22" (3/4) ... [2021-08-29 09:12:01,614 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-29 09:12:01,614 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 09:12:01,615 INFO L158 Benchmark]: Toolchain (without parser) took 159661.62ms. Allocated memory was 69.2MB in the beginning and 94.4MB in the end (delta: 25.2MB). Free memory was 47.3MB in the beginning and 46.2MB in the end (delta: 1.1MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. [2021-08-29 09:12:01,615 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 69.2MB. Free memory was 49.9MB in the beginning and 49.8MB in the end (delta: 31.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:12:01,615 INFO L158 Benchmark]: CACSL2BoogieTranslator took 409.85ms. Allocated memory is still 69.2MB. Free memory was 47.1MB in the beginning and 44.2MB in the end (delta: 2.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 09:12:01,616 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.11ms. Allocated memory is still 69.2MB. Free memory was 44.0MB in the beginning and 42.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 09:12:01,616 INFO L158 Benchmark]: Boogie Preprocessor took 48.74ms. Allocated memory is still 69.2MB. Free memory was 41.8MB in the beginning and 39.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 09:12:01,616 INFO L158 Benchmark]: RCFGBuilder took 394.40ms. Allocated memory is still 69.2MB. Free memory was 39.8MB in the beginning and 44.1MB in the end (delta: -4.2MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2021-08-29 09:12:01,617 INFO L158 Benchmark]: TraceAbstraction took 158754.89ms. Allocated memory was 69.2MB in the beginning and 94.4MB in the end (delta: 25.2MB). Free memory was 43.8MB in the beginning and 46.2MB in the end (delta: -2.4MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. [2021-08-29 09:12:01,617 INFO L158 Benchmark]: Witness Printer took 3.31ms. Allocated memory is still 94.4MB. Free memory is still 46.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:12:01,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 69.2MB. Free memory was 49.9MB in the beginning and 49.8MB in the end (delta: 31.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 409.85ms. Allocated memory is still 69.2MB. Free memory was 47.1MB in the beginning and 44.2MB in the end (delta: 2.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.11ms. Allocated memory is still 69.2MB. Free memory was 44.0MB in the beginning and 42.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.74ms. Allocated memory is still 69.2MB. Free memory was 41.8MB in the beginning and 39.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 394.40ms. Allocated memory is still 69.2MB. Free memory was 39.8MB in the beginning and 44.1MB in the end (delta: -4.2MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * TraceAbstraction took 158754.89ms. Allocated memory was 69.2MB in the beginning and 94.4MB in the end (delta: 25.2MB). Free memory was 43.8MB in the beginning and 46.2MB in the end (delta: -2.4MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. * Witness Printer took 3.31ms. Allocated memory is still 94.4MB. Free memory is still 46.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1009]: 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. Possible FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] COND TRUE __VERIFIER_nondet_int() [L1000] head->data = 2 [L1000] head->opt = malloc(sizeof(SLL)) [L1000] EXPR head->opt [L1000] head->opt->next = ((void*)0) [L1001] SLL* x = head; [L1003] COND TRUE __VERIFIER_nondet_int() [L1003] x->next = malloc(sizeof(SLL)) [L1003] EXPR x->next [L1003] x->next->prev = x [L1003] EXPR x->next [L1003] x = x->next [L1003] x->next = ((void*)0) [L1003] COND TRUE __VERIFIER_nondet_int() [L1003] x->data = 2 [L1003] x->opt = malloc(sizeof(SLL)) [L1003] EXPR x->opt [L1003] x->opt->next = ((void*)0) [L1003] COND FALSE !(__VERIFIER_nondet_int()) [L1006] x = head [L1007] COND TRUE x != ((void*)0) [L1009] EXPR x->data [L1009] EXPR x->data == 2 && x->opt != x [L1009] EXPR x->opt [L1009] EXPR x->data == 2 && x->opt != x [L1009] EXPR x->data == 2 && x->opt != x && x->opt->next == ((void*)0) [L1009] EXPR x->opt [L1009] EXPR x->opt->next [L1009] EXPR x->data == 2 && x->opt != x && x->opt->next == ((void*)0) [L1009] EXPR (x->data == 2 && x->opt != x && x->opt->next == ((void*)0)) || x->opt == x [L1009] EXPR x->opt [L1009] EXPR (x->data == 2 && x->opt != x && x->opt->next == ((void*)0)) || x->opt == x [L1009] COND TRUE !((x->data == 2 && x->opt != x && x->opt->next == ((void*)0)) || x->opt == x) [L1009] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 158690.80ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 12.31ms, AutomataDifference: 6772.45ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.74ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 555 SdHoareTripleChecker+Valid, 5795.49ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 555 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 5181.48ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 389 mSDsCounter, 113 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1142 IncrementalHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 113 mSolverCounterUnsat, 0 mSDtfsCounter, 1142 mSolverCounterSat, 16.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1195.14ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=6, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 51.53ms AutomataMinimizationTime, 7 MinimizatonAttempts, 157 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 76.35ms SsaConstructionTime, 182.16ms SatisfiabilityAnalysisTime, 2193.12ms InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 200 ConstructedInterpolants, 0 QuantifiedInterpolants, 1844 SizeOfPredicates, 48 NumberOfNonLiveVariables, 425 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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 [2021-08-29 09:12:01,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...