./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer --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 857285933727e0d6539ccc24abeb7a5fe95b45c6 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:31:54,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:31:54,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:31:54,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:31:54,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:31:54,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:31:54,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:31:54,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:31:54,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:31:54,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:31:54,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:31:54,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:31:54,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:31:54,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:31:54,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:31:54,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:31:54,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:31:54,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:31:54,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:31:54,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:31:54,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:31:54,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:31:54,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:31:54,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:31:54,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:31:54,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:31:54,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:31:54,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:31:54,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:31:54,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:31:54,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:31:54,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:31:54,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:31:54,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:31:54,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:31:54,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:31:54,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:31:54,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:31:54,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:31:54,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:31:54,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:31:54,354 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:31:54,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:31:54,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:31:54,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:31:54,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:31:54,386 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:31:54,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:31:54,387 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:31:54,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:31:54,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:31:54,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:31:54,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:31:54,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:31:54,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:31:54,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:31:54,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:31:54,390 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:31:54,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:31:54,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:31:54,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:31:54,391 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:31:54,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:31:54,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:31:54,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:31:54,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:31:54,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:31:54,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:31:54,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:31:54,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:31:54,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:31:54,394 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:/tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 857285933727e0d6539ccc24abeb7a5fe95b45c6 [2020-11-30 01:31:54,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:31:54,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:31:54,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:31:54,746 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:31:54,747 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:31:54,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/../../sv-benchmarks/c/list-properties/list-2.i [2020-11-30 01:31:54,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/data/c751e8125/8583ea8ec3c8488bb37515b1fba45223/FLAGee6064db7 [2020-11-30 01:31:55,548 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:31:55,549 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/sv-benchmarks/c/list-properties/list-2.i [2020-11-30 01:31:55,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/data/c751e8125/8583ea8ec3c8488bb37515b1fba45223/FLAGee6064db7 [2020-11-30 01:31:55,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/data/c751e8125/8583ea8ec3c8488bb37515b1fba45223 [2020-11-30 01:31:55,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:31:55,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:31:55,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:31:55,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:31:55,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:31:55,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:31:55" (1/1) ... [2020-11-30 01:31:55,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13272432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:55, skipping insertion in model container [2020-11-30 01:31:55,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:31:55" (1/1) ... [2020-11-30 01:31:55,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:31:55,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:31:56,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:31:56,475 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:31:56,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:31:56,647 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:31:56,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56 WrapperNode [2020-11-30 01:31:56,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:31:56,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:31:56,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:31:56,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:31:56,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:31:56,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:31:56,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:31:56,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:31:56,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:31:56,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:31:56,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:31:56,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:31:56,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:31:56,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:31:56,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:31:56,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 01:31:56,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-30 01:31:56,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:31:56,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-30 01:31:56,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:31:56,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:31:56,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:31:57,590 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:31:57,590 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-11-30 01:31:57,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:31:57 BoogieIcfgContainer [2020-11-30 01:31:57,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:31:57,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:31:57,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:31:57,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:31:57,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:31:55" (1/3) ... [2020-11-30 01:31:57,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636aa071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:31:57, skipping insertion in model container [2020-11-30 01:31:57,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (2/3) ... [2020-11-30 01:31:57,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636aa071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:31:57, skipping insertion in model container [2020-11-30 01:31:57,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:31:57" (3/3) ... [2020-11-30 01:31:57,607 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-11-30 01:31:57,628 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:31:57,634 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:31:57,660 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:31:57,694 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:31:57,694 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:31:57,695 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:31:57,695 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:31:57,695 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:31:57,695 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:31:57,696 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:31:57,696 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:31:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-30 01:31:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:31:57,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:57,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:57,724 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:57,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1262221238, now seen corresponding path program 1 times [2020-11-30 01:31:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:57,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453983234] [2020-11-30 01:31:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:57,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453983234] [2020-11-30 01:31:57,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:57,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:31:57,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899151387] [2020-11-30 01:31:57,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:31:57,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:57,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:31:57,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:31:57,970 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-11-30 01:31:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:57,994 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-11-30 01:31:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:31:57,996 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-11-30 01:31:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:58,006 INFO L225 Difference]: With dead ends: 51 [2020-11-30 01:31:58,006 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 01:31:58,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:31:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 01:31:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 01:31:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 01:31:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-30 01:31:58,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-11-30 01:31:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:58,055 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-30 01:31:58,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:31:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-30 01:31:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:31:58,057 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:58,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:58,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:31:58,061 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:58,065 INFO L82 PathProgramCache]: Analyzing trace with hash -488966590, now seen corresponding path program 1 times [2020-11-30 01:31:58,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:58,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953276592] [2020-11-30 01:31:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:58,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953276592] [2020-11-30 01:31:58,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:58,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:31:58,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082909779] [2020-11-30 01:31:58,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:31:58,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:58,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:31:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:58,295 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-11-30 01:31:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:58,497 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-11-30 01:31:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:31:58,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-30 01:31:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:58,502 INFO L225 Difference]: With dead ends: 52 [2020-11-30 01:31:58,502 INFO L226 Difference]: Without dead ends: 46 [2020-11-30 01:31:58,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:31:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-30 01:31:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2020-11-30 01:31:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 01:31:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-11-30 01:31:58,524 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2020-11-30 01:31:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:58,525 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-11-30 01:31:58,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:31:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-11-30 01:31:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:31:58,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:58,529 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:58,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:31:58,530 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:58,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2080072957, now seen corresponding path program 1 times [2020-11-30 01:31:58,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:58,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702539999] [2020-11-30 01:31:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:58,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702539999] [2020-11-30 01:31:58,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:58,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:31:58,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709560064] [2020-11-30 01:31:58,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:31:58,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:58,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:31:58,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:58,676 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2020-11-30 01:31:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:58,853 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-11-30 01:31:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:31:58,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-11-30 01:31:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:58,856 INFO L225 Difference]: With dead ends: 54 [2020-11-30 01:31:58,856 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 01:31:58,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:31:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 01:31:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-11-30 01:31:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 01:31:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-30 01:31:58,865 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-11-30 01:31:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:58,865 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-30 01:31:58,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:31:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-30 01:31:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:31:58,867 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:58,867 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:58,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:31:58,868 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1022845187, now seen corresponding path program 1 times [2020-11-30 01:31:58,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:58,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24781154] [2020-11-30 01:31:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:59,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24781154] [2020-11-30 01:31:59,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:59,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:31:59,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140683221] [2020-11-30 01:31:59,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:31:59,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:59,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:31:59,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:59,022 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-11-30 01:31:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:59,166 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-11-30 01:31:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:31:59,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-11-30 01:31:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:59,169 INFO L225 Difference]: With dead ends: 54 [2020-11-30 01:31:59,170 INFO L226 Difference]: Without dead ends: 41 [2020-11-30 01:31:59,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:31:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-30 01:31:59,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2020-11-30 01:31:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:31:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-30 01:31:59,180 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2020-11-30 01:31:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:59,180 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-30 01:31:59,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:31:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-30 01:31:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:31:59,182 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:59,183 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:59,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:31:59,183 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash -322714455, now seen corresponding path program 1 times [2020-11-30 01:31:59,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:59,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074830285] [2020-11-30 01:31:59,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:59,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074830285] [2020-11-30 01:31:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642265558] [2020-11-30 01:31:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:59,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:31:59,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:59,658 INFO L384 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 [2020-11-30 01:31:59,659 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:59,669 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:59,670 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:59,670 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 01:31:59,781 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:59,781 INFO L384 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 11 treesize of output 15 [2020-11-30 01:31:59,783 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:59,803 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:59,812 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-30 01:31:59,813 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:59,832 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:59,832 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:59,833 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-11-30 01:31:59,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:31:59,908 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-11-30 01:31:59,909 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:31:59,922 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:31:59,922 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:31:59,922 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-11-30 01:32:00,034 INFO L384 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 19 treesize of output 18 [2020-11-30 01:32:00,035 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:00,053 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:00,057 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:00,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-11-30 01:32:00,161 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-11-30 01:32:00,166 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:00,177 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:00,183 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:00,184 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-11-30 01:32:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:00,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:32:00,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-30 01:32:00,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929274985] [2020-11-30 01:32:00,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:32:00,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:00,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:32:00,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:32:00,212 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 13 states. [2020-11-30 01:32:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:00,782 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-11-30 01:32:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:32:00,785 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-11-30 01:32:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:00,786 INFO L225 Difference]: With dead ends: 56 [2020-11-30 01:32:00,786 INFO L226 Difference]: Without dead ends: 48 [2020-11-30 01:32:00,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:32:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-30 01:32:00,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-11-30 01:32:00,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 01:32:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-30 01:32:00,801 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 22 [2020-11-30 01:32:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:00,802 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-30 01:32:00,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:32:00,803 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-30 01:32:00,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:32:00,805 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:00,805 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:01,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:01,032 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash 477596521, now seen corresponding path program 1 times [2020-11-30 01:32:01,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:01,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162290141] [2020-11-30 01:32:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:01,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162290141] [2020-11-30 01:32:01,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280936590] [2020-11-30 01:32:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:01,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:32:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:01,343 INFO L384 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 [2020-11-30 01:32:01,344 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,356 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:01,356 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,357 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 01:32:01,424 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:01,424 INFO L384 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 11 treesize of output 15 [2020-11-30 01:32:01,425 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,440 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:01,448 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-30 01:32:01,449 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,463 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:01,463 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,463 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-11-30 01:32:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:32:01,517 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-11-30 01:32:01,517 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,533 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:01,534 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,534 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-11-30 01:32:01,599 INFO L384 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 19 treesize of output 18 [2020-11-30 01:32:01,600 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,613 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:01,616 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:01,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-11-30 01:32:01,712 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-11-30 01:32:01,719 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,724 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:01,726 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:01,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-11-30 01:32:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:01,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:32:01,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-11-30 01:32:01,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925949356] [2020-11-30 01:32:01,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:32:01,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:01,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:32:01,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:32:01,735 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 13 states. [2020-11-30 01:32:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:02,241 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-11-30 01:32:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:32:02,245 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-11-30 01:32:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:02,246 INFO L225 Difference]: With dead ends: 65 [2020-11-30 01:32:02,246 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 01:32:02,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:32:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 01:32:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-11-30 01:32:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:32:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-11-30 01:32:02,264 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 22 [2020-11-30 01:32:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:02,265 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-11-30 01:32:02,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:32:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-11-30 01:32:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:32:02,267 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:02,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:02,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:02,485 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:02,485 INFO L82 PathProgramCache]: Analyzing trace with hash -168333404, now seen corresponding path program 1 times [2020-11-30 01:32:02,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:02,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000791121] [2020-11-30 01:32:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:02,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000791121] [2020-11-30 01:32:02,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740379649] [2020-11-30 01:32:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:02,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-30 01:32:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:02,904 INFO L384 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 [2020-11-30 01:32:02,904 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:02,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:02,911 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:02,912 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 01:32:02,940 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:02,940 INFO L384 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 11 treesize of output 15 [2020-11-30 01:32:02,941 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:02,956 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:02,957 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:02,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-11-30 01:32:02,979 INFO L384 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 11 treesize of output 7 [2020-11-30 01:32:02,980 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:02,999 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:03,008 INFO L384 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 11 treesize of output 7 [2020-11-30 01:32:03,008 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,028 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:03,030 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,030 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-11-30 01:32:03,047 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_21|], 2=[|v_#memory_$Pointer$.base_16|, |v_#memory_$Pointer$.offset_14|]} [2020-11-30 01:32:03,054 INFO L384 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 23 treesize of output 15 [2020-11-30 01:32:03,054 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,073 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:03,106 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:03,106 INFO L384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-11-30 01:32:03,110 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-11-30 01:32:03,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-30 01:32:03,112 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,146 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-11-30 01:32:03,152 INFO L384 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-11-30 01:32:03,153 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,161 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:03,161 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,162 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-11-30 01:32:03,205 INFO L384 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 31 treesize of output 19 [2020-11-30 01:32:03,206 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,214 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:03,217 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 19 treesize of output 11 [2020-11-30 01:32:03,218 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,224 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:03,228 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,229 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-11-30 01:32:03,261 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-11-30 01:32:03,262 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:03,268 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:03,268 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-30 01:32:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:03,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:32:03,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-30 01:32:03,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861983049] [2020-11-30 01:32:03,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:32:03,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:03,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:32:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:32:03,274 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 10 states. [2020-11-30 01:32:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:03,708 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-11-30 01:32:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:32:03,711 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-11-30 01:32:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:03,713 INFO L225 Difference]: With dead ends: 69 [2020-11-30 01:32:03,713 INFO L226 Difference]: Without dead ends: 63 [2020-11-30 01:32:03,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:32:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-30 01:32:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2020-11-30 01:32:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-30 01:32:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-11-30 01:32:03,721 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 24 [2020-11-30 01:32:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:03,722 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-11-30 01:32:03,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:32:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-11-30 01:32:03,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 01:32:03,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:03,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:03,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:03,924 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash 970919391, now seen corresponding path program 1 times [2020-11-30 01:32:03,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:03,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374543979] [2020-11-30 01:32:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:04,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374543979] [2020-11-30 01:32:04,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125958291] [2020-11-30 01:32:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-30 01:32:04,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:04,386 INFO L384 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 [2020-11-30 01:32:04,386 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,403 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,404 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,404 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 01:32:04,433 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,434 INFO L384 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 11 treesize of output 15 [2020-11-30 01:32:04,435 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,446 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,447 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,447 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-11-30 01:32:04,481 INFO L384 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 11 treesize of output 7 [2020-11-30 01:32:04,481 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,502 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,507 INFO L384 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 11 treesize of output 7 [2020-11-30 01:32:04,508 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,523 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,528 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,529 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-11-30 01:32:04,557 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_22|], 2=[|v_#memory_$Pointer$.base_18|, |v_#memory_$Pointer$.offset_16|]} [2020-11-30 01:32:04,568 INFO L384 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 23 treesize of output 15 [2020-11-30 01:32:04,568 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,591 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,622 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,623 INFO L384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-11-30 01:32:04,625 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-11-30 01:32:04,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-30 01:32:04,627 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,664 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-11-30 01:32:04,670 INFO L384 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-11-30 01:32:04,671 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,685 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,685 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,686 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-11-30 01:32:04,721 INFO L384 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 31 treesize of output 19 [2020-11-30 01:32:04,722 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,733 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,737 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 19 treesize of output 11 [2020-11-30 01:32:04,737 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,745 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,746 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,746 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-11-30 01:32:04,754 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-11-30 01:32:04,755 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,758 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:04,758 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:04,758 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-30 01:32:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:04,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:32:04,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-30 01:32:04,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547630003] [2020-11-30 01:32:04,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:32:04,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:32:04,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:32:04,793 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 11 states. [2020-11-30 01:32:05,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:05,205 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-11-30 01:32:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:32:05,206 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-11-30 01:32:05,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:05,207 INFO L225 Difference]: With dead ends: 71 [2020-11-30 01:32:05,207 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 01:32:05,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:32:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 01:32:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 40. [2020-11-30 01:32:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-30 01:32:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-11-30 01:32:05,214 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 26 [2020-11-30 01:32:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:05,214 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-11-30 01:32:05,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:32:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-11-30 01:32:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 01:32:05,215 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:05,215 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:05,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:05,416 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:05,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2131998753, now seen corresponding path program 2 times [2020-11-30 01:32:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:05,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480905990] [2020-11-30 01:32:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:05,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480905990] [2020-11-30 01:32:05,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996464377] [2020-11-30 01:32:05,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:05,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:32:05,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:32:05,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-30 01:32:05,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:05,740 INFO L384 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 [2020-11-30 01:32:05,740 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,747 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:05,747 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,747 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 01:32:05,774 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:05,774 INFO L384 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 11 treesize of output 15 [2020-11-30 01:32:05,775 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,785 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:05,786 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,786 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-11-30 01:32:05,799 INFO L384 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 11 treesize of output 7 [2020-11-30 01:32:05,799 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,814 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:05,820 INFO L384 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 11 treesize of output 7 [2020-11-30 01:32:05,821 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,846 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:05,847 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,848 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-11-30 01:32:05,863 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_23|], 2=[|v_#memory_$Pointer$.base_20|, |v_#memory_$Pointer$.offset_18|]} [2020-11-30 01:32:05,871 INFO L384 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 23 treesize of output 15 [2020-11-30 01:32:05,871 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,902 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:05,924 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:05,924 INFO L384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-11-30 01:32:05,926 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-11-30 01:32:05,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-30 01:32:05,927 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,961 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-11-30 01:32:05,967 INFO L384 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-11-30 01:32:05,968 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:05,977 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:05,977 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-11-30 01:32:06,018 INFO L384 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 31 treesize of output 19 [2020-11-30 01:32:06,019 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:06,036 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:06,040 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 19 treesize of output 11 [2020-11-30 01:32:06,041 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:06,047 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:06,049 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:06,049 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-11-30 01:32:06,061 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-11-30 01:32:06,062 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:06,067 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:06,068 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:06,068 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-30 01:32:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:06,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:32:06,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-30 01:32:06,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560068866] [2020-11-30 01:32:06,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:32:06,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:06,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:32:06,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:32:06,091 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 11 states. [2020-11-30 01:32:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:06,542 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-11-30 01:32:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:32:06,543 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-11-30 01:32:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:06,544 INFO L225 Difference]: With dead ends: 64 [2020-11-30 01:32:06,544 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 01:32:06,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:32:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 01:32:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2020-11-30 01:32:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 01:32:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-11-30 01:32:06,550 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 26 [2020-11-30 01:32:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:06,550 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-11-30 01:32:06,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:32:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-11-30 01:32:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 01:32:06,551 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:06,552 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:06,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:06,768 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash 524355472, now seen corresponding path program 2 times [2020-11-30 01:32:06,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:06,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583818735] [2020-11-30 01:32:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:07,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583818735] [2020-11-30 01:32:07,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261495897] [2020-11-30 01:32:07,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:07,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:32:07,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:32:07,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-30 01:32:07,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:07,164 INFO L384 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 [2020-11-30 01:32:07,164 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,170 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 01:32:07,202 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,202 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-11-30 01:32:07,203 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,242 INFO L625 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-11-30 01:32:07,247 INFO L384 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 11 treesize of output 7 [2020-11-30 01:32:07,248 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,262 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,263 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,263 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-11-30 01:32:07,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:32:07,319 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-11-30 01:32:07,320 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,347 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,347 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-11-30 01:32:07,417 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,417 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-11-30 01:32:07,418 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,435 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,442 INFO L384 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 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-30 01:32:07,442 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,480 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,481 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,481 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-11-30 01:32:07,573 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-30 01:32:07,573 INFO L384 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 1 case distinctions, treesize of input 34 treesize of output 21 [2020-11-30 01:32:07,574 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,593 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,595 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:07,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-11-30 01:32:07,743 INFO L384 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 0 case distinctions, treesize of input 26 treesize of output 28 [2020-11-30 01:32:07,744 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,764 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,769 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:07,770 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-11-30 01:32:07,867 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-11-30 01:32:07,881 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,893 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:07,895 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:07,896 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-11-30 01:32:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:07,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:32:07,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2020-11-30 01:32:07,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096817169] [2020-11-30 01:32:07,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:32:07,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:32:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:32:07,922 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 18 states. [2020-11-30 01:32:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:08,828 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-11-30 01:32:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 01:32:08,828 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-11-30 01:32:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:08,829 INFO L225 Difference]: With dead ends: 75 [2020-11-30 01:32:08,829 INFO L226 Difference]: Without dead ends: 65 [2020-11-30 01:32:08,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:32:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-30 01:32:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-11-30 01:32:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-30 01:32:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-11-30 01:32:08,849 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 26 [2020-11-30 01:32:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:08,850 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-11-30 01:32:08,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:32:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-11-30 01:32:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 01:32:08,854 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:08,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:09,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:09,076 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash 775122512, now seen corresponding path program 1 times [2020-11-30 01:32:09,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:09,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707126162] [2020-11-30 01:32:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:09,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707126162] [2020-11-30 01:32:09,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539303544] [2020-11-30 01:32:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:09,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-30 01:32:09,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:09,482 INFO L384 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 [2020-11-30 01:32:09,482 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:09,499 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 01:32:09,555 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:09,555 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-11-30 01:32:09,556 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,600 INFO L625 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-11-30 01:32:09,608 INFO L384 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 11 treesize of output 7 [2020-11-30 01:32:09,608 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,623 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:09,623 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,623 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-11-30 01:32:09,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:32:09,681 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-11-30 01:32:09,682 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,696 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:09,696 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,696 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-11-30 01:32:09,752 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:09,752 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-11-30 01:32:09,753 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,770 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:09,775 INFO L384 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 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-30 01:32:09,775 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,792 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:09,792 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,792 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-11-30 01:32:09,864 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-30 01:32:09,865 INFO L384 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 1 case distinctions, treesize of input 34 treesize of output 21 [2020-11-30 01:32:09,866 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:09,878 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:09,880 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:09,880 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-11-30 01:32:09,988 INFO L384 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 0 case distinctions, treesize of input 26 treesize of output 28 [2020-11-30 01:32:09,989 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:10,028 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:10,033 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:10,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-11-30 01:32:10,162 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-11-30 01:32:10,165 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:10,180 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:10,184 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:10,184 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-11-30 01:32:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:10,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:32:10,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2020-11-30 01:32:10,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891538483] [2020-11-30 01:32:10,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:32:10,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:10,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:32:10,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:32:10,229 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 18 states. [2020-11-30 01:32:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:11,095 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-11-30 01:32:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 01:32:11,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-11-30 01:32:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:11,098 INFO L225 Difference]: With dead ends: 95 [2020-11-30 01:32:11,098 INFO L226 Difference]: Without dead ends: 87 [2020-11-30 01:32:11,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:32:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-30 01:32:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2020-11-30 01:32:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-30 01:32:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-11-30 01:32:11,107 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 26 [2020-11-30 01:32:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:11,108 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-11-30 01:32:11,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:32:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-11-30 01:32:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 01:32:11,116 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:11,117 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:11,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:11,330 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2117047499, now seen corresponding path program 3 times [2020-11-30 01:32:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:11,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984552320] [2020-11-30 01:32:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:11,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984552320] [2020-11-30 01:32:11,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862312167] [2020-11-30 01:32:11,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:11,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:32:11,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:32:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-30 01:32:11,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:11,927 INFO L384 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 [2020-11-30 01:32:11,927 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:11,930 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:11,930 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:11,930 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-30 01:32:12,008 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,008 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-11-30 01:32:12,009 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,075 INFO L625 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-11-30 01:32:12,076 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2020-11-30 01:32:12,152 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-30 01:32:12,152 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,172 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,181 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-30 01:32:12,181 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,199 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,200 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,201 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:59, output treesize:45 [2020-11-30 01:32:12,264 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,264 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2020-11-30 01:32:12,265 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,299 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,305 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_34|], 2=[|v_#memory_$Pointer$.offset_20|, |v_#memory_$Pointer$.base_26|]} [2020-11-30 01:32:12,314 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-30 01:32:12,314 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,357 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:32:12,368 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-11-30 01:32:12,369 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,407 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,475 INFO L350 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2020-11-30 01:32:12,475 INFO L384 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 1 case distinctions, treesize of input 45 treesize of output 31 [2020-11-30 01:32:12,476 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,519 INFO L625 ElimStorePlain]: treesize reduction 10, result has 80.4 percent of original size [2020-11-30 01:32:12,519 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,519 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:94, output treesize:41 [2020-11-30 01:32:12,608 INFO L384 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 118 [2020-11-30 01:32:12,609 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,650 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:32:12,658 INFO L384 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 0 case distinctions, treesize of input 69 treesize of output 23 [2020-11-30 01:32:12,658 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,683 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,733 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:12,734 INFO L384 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 125 [2020-11-30 01:32:12,737 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 3, 2, 1] term [2020-11-30 01:32:12,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-11-30 01:32:12,739 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,812 INFO L625 ElimStorePlain]: treesize reduction 34, result has 75.9 percent of original size [2020-11-30 01:32:12,813 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,813 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:176, output treesize:122 [2020-11-30 01:32:12,904 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_36|], 6=[|v_#memory_$Pointer$.offset_22|, |v_#memory_$Pointer$.base_28|]} [2020-11-30 01:32:12,913 INFO L384 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 0 case distinctions, treesize of input 67 treesize of output 48 [2020-11-30 01:32:12,914 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:12,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:13,001 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:13,001 INFO L384 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 254 treesize of output 294 [2020-11-30 01:32:13,003 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 9 disjuncts [2020-11-30 01:32:13,004 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-11-30 01:32:13,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-11-30 01:32:13,013 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 9 disjuncts [2020-11-30 01:32:13,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-11-30 01:32:13,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-11-30 01:32:13,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-11-30 01:32:13,021 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 7 xjuncts. [2020-11-30 01:32:13,258 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-11-30 01:32:13,260 INFO L625 ElimStorePlain]: treesize reduction 2108, result has 8.5 percent of original size [2020-11-30 01:32:13,348 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:13,349 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 195 treesize of output 197 [2020-11-30 01:32:13,353 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,354 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,361 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,368 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-11-30 01:32:13,370 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,371 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,376 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,382 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,383 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,388 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,395 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,396 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,402 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,407 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,408 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,415 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,425 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,427 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,432 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,457 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,459 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,469 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,474 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-11-30 01:32:13,476 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,478 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,483 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,488 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,489 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,494 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,501 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,502 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,507 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,512 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,513 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,518 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,524 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,526 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-11-30 01:32:13,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-30 01:32:13,531 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-30 01:32:13,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-30 01:32:13,536 INFO L545 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:13,622 INFO L625 ElimStorePlain]: treesize reduction 108, result has 40.0 percent of original size [2020-11-30 01:32:13,623 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:13,624 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:286, output treesize:126 [2020-11-30 01:32:13,726 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:13,727 INFO L384 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 76 [2020-11-30 01:32:13,729 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-11-30 01:32:13,730 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-11-30 01:32:13,731 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:13,790 INFO L625 ElimStorePlain]: treesize reduction 22, result has 72.2 percent of original size [2020-11-30 01:32:13,795 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 19 [2020-11-30 01:32:13,797 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:13,814 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:13,816 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 01:32:13,816 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:144, output treesize:19 [2020-11-30 01:32:13,884 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-11-30 01:32:13,885 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:32:13,892 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:32:13,894 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:32:13,894 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2020-11-30 01:32:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:13,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:32:13,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-11-30 01:32:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278101117] [2020-11-30 01:32:13,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 01:32:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:13,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 01:32:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:32:13,906 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 20 states. [2020-11-30 01:32:15,003 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 01:32:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:15,317 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2020-11-30 01:32:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:32:15,318 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-11-30 01:32:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:15,319 INFO L225 Difference]: With dead ends: 94 [2020-11-30 01:32:15,319 INFO L226 Difference]: Without dead ends: 86 [2020-11-30 01:32:15,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:32:15,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-30 01:32:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-11-30 01:32:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-30 01:32:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-11-30 01:32:15,343 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 28 [2020-11-30 01:32:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:15,344 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-11-30 01:32:15,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 01:32:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-11-30 01:32:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 01:32:15,350 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:15,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:15,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 01:32:15,565 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1393955211, now seen corresponding path program 1 times [2020-11-30 01:32:15,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:15,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514329367] [2020-11-30 01:32:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:32:15,578 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:32:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:32:15,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:32:15,649 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:32:15,650 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:32:15,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-30 01:32:15,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:32:15 BoogieIcfgContainer [2020-11-30 01:32:15,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:32:15,703 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:32:15,703 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:32:15,704 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:32:15,704 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:31:57" (3/4) ... [2020-11-30 01:32:15,706 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:32:15,783 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f5950e4f-bc4e-41ea-9667-bf2f78a6a8d7/bin/uautomizer/witness.graphml [2020-11-30 01:32:15,783 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:32:15,785 INFO L168 Benchmark]: Toolchain (without parser) took 19944.38 ms. Allocated memory was 94.4 MB in the beginning and 197.1 MB in the end (delta: 102.8 MB). Free memory was 61.2 MB in the beginning and 70.5 MB in the end (delta: -9.2 MB). Peak memory consumption was 91.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:15,785 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 75.5 MB. Free memory was 36.5 MB in the beginning and 36.5 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:32:15,786 INFO L168 Benchmark]: CACSL2BoogieTranslator took 793.04 ms. Allocated memory is still 94.4 MB. Free memory was 61.0 MB in the beginning and 59.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:15,786 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.92 ms. Allocated memory is still 94.4 MB. Free memory was 59.5 MB in the beginning and 57.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:15,787 INFO L168 Benchmark]: Boogie Preprocessor took 37.96 ms. Allocated memory is still 94.4 MB. Free memory was 57.4 MB in the beginning and 56.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:32:15,787 INFO L168 Benchmark]: RCFGBuilder took 820.82 ms. Allocated memory is still 94.4 MB. Free memory was 55.7 MB in the beginning and 36.8 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:15,788 INFO L168 Benchmark]: TraceAbstraction took 18108.55 ms. Allocated memory was 94.4 MB in the beginning and 197.1 MB in the end (delta: 102.8 MB). Free memory was 36.4 MB in the beginning and 73.6 MB in the end (delta: -37.2 MB). Peak memory consumption was 67.0 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:15,788 INFO L168 Benchmark]: Witness Printer took 80.19 ms. Allocated memory is still 197.1 MB. Free memory was 73.6 MB in the beginning and 70.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:15,791 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 75.5 MB. Free memory was 36.5 MB in the beginning and 36.5 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 793.04 ms. Allocated memory is still 94.4 MB. Free memory was 61.0 MB in the beginning and 59.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.92 ms. Allocated memory is still 94.4 MB. Free memory was 59.5 MB in the beginning and 57.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.96 ms. Allocated memory is still 94.4 MB. Free memory was 57.4 MB in the beginning and 56.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 820.82 ms. Allocated memory is still 94.4 MB. Free memory was 55.7 MB in the beginning and 36.8 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18108.55 ms. Allocated memory was 94.4 MB in the beginning and 197.1 MB in the end (delta: 102.8 MB). Free memory was 36.4 MB in the beginning and 73.6 MB in the end (delta: -37.2 MB). Peak memory consumption was 67.0 MB. Max. memory is 16.1 GB. * Witness Printer took 80.19 ms. Allocated memory is still 197.1 MB. Free memory was 73.6 MB in the beginning and 70.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h [L554] COND TRUE p->h == 1 [L555] EXPR p->n [L555] p = p->n [L554] EXPR p->h [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.9s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 261 SDtfs, 634 SDslu, 1330 SDs, 0 SdLazy, 1900 SolverSat, 240 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 355 GetRequests, 173 SyntacticMatches, 8 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 175 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 500 NumberOfCodeBlocks, 500 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 452 ConstructedInterpolants, 17 QuantifiedInterpolants, 130191 SizeOfPredicates, 104 NumberOfNonLiveVariables, 886 ConjunctsInSsa, 297 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 16/92 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 proved your program to be incorrect! Received shutdown request...