./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o5-2.c --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_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/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 849d3022dabab2c0a7f0738e4a7087eca0185d61 .......................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:26:54,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:26:54,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:26:54,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:26:54,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:26:54,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:26:54,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:26:54,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:26:54,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:26:54,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:26:54,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:26:54,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:26:54,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:26:54,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:26:54,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:26:54,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:26:54,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:26:54,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:26:54,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:26:54,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:26:54,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:26:54,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:26:54,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:26:54,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:26:54,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:26:54,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:26:54,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:26:54,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:26:54,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:26:54,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:26:54,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:26:54,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:26:54,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:26:54,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:26:54,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:26:54,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:26:54,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:26:54,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:26:54,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:26:54,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:26:54,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:26:54,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:26:54,793 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:26:54,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:26:54,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:26:54,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:26:54,797 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:26:54,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:26:54,798 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:26:54,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:26:54,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:26:54,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:26:54,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:26:54,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:26:54,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:26:54,800 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:26:54,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:26:54,801 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:26:54,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:26:54,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:26:54,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:26:54,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:26:54,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:26:54,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:26:54,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:26:54,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:26:54,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:26:54,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:26:54,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:26:54,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:26:54,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:26:54,804 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_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 849d3022dabab2c0a7f0738e4a7087eca0185d61 [2020-11-30 01:26:55,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:26:55,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:26:55,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:26:55,109 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:26:55,114 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:26:55,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b3_o5-2.c [2020-11-30 01:26:55,223 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/data/a1f97aa6b/adc388dcecee486eb6493ce95aa2773b/FLAGd8530f060 [2020-11-30 01:26:55,742 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:26:55,743 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/sv-benchmarks/c/recursive-simple/id_b3_o5-2.c [2020-11-30 01:26:55,754 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/data/a1f97aa6b/adc388dcecee486eb6493ce95aa2773b/FLAGd8530f060 [2020-11-30 01:26:56,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/data/a1f97aa6b/adc388dcecee486eb6493ce95aa2773b [2020-11-30 01:26:56,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:26:56,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:26:56,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:26:56,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:26:56,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:26:56,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd2778a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56, skipping insertion in model container [2020-11-30 01:26:56,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:26:56,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:26:56,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:26:56,315 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:26:56,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:26:56,343 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:26:56,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56 WrapperNode [2020-11-30 01:26:56,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:26:56,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:26:56,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:26:56,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:26:56,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:26:56,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:26:56,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:26:56,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:26:56,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... [2020-11-30 01:26:56,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:26:56,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:26:56,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:26:56,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:26:56,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/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 01:26:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:26:56,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:26:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:26:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-30 01:26:56,480 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-30 01:26:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:26:56,714 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:26:56,715 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 01:26:56,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:26:56 BoogieIcfgContainer [2020-11-30 01:26:56,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:26:56,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:26:56,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:26:56,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:26:56,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:26:56" (1/3) ... [2020-11-30 01:26:56,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c49b9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:26:56, skipping insertion in model container [2020-11-30 01:26:56,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:26:56" (2/3) ... [2020-11-30 01:26:56,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c49b9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:26:56, skipping insertion in model container [2020-11-30 01:26:56,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:26:56" (3/3) ... [2020-11-30 01:26:56,744 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o5-2.c [2020-11-30 01:26:56,754 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:26:56,759 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:26:56,770 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:26:56,793 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:26:56,794 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:26:56,794 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:26:56,794 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:26:56,794 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:26:56,794 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:26:56,794 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:26:56,795 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:26:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-30 01:26:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:26:56,837 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:56,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:56,838 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash -948071546, now seen corresponding path program 1 times [2020-11-30 01:26:56,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:56,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544207730] [2020-11-30 01:26:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:26:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,063 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 01:26:57,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544207730] [2020-11-30 01:26:57,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:26:57,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:26:57,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845383343] [2020-11-30 01:26:57,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:26:57,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:57,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:26:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:57,093 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-11-30 01:26:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:57,154 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-11-30 01:26:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:26:57,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 01:26:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:57,164 INFO L225 Difference]: With dead ends: 30 [2020-11-30 01:26:57,165 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 01:26:57,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 01:26:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-30 01:26:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-30 01:26:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-30 01:26:57,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-11-30 01:26:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:57,220 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-30 01:26:57,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:26:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-30 01:26:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:26:57,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:57,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:57,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:26:57,224 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1034741369, now seen corresponding path program 1 times [2020-11-30 01:26:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:57,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578424168] [2020-11-30 01:26:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:26:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:26:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:26:57,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578424168] [2020-11-30 01:26:57,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:26:57,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:26:57,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593565617] [2020-11-30 01:26:57,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:26:57,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:26:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:57,398 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-11-30 01:26:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:57,421 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-30 01:26:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:26:57,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-30 01:26:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:57,423 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:26:57,423 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 01:26:57,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 01:26:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-30 01:26:57,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 01:26:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-30 01:26:57,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2020-11-30 01:26:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:57,430 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-30 01:26:57,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:26:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-30 01:26:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:26:57,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:57,432 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:57,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:26:57,432 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1063370520, now seen corresponding path program 1 times [2020-11-30 01:26:57,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:57,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662129815] [2020-11-30 01:26:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:26:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:26:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:26:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662129815] [2020-11-30 01:26:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570888203] [2020-11-30 01:26:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/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 01:26:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:57,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:26:57,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:26:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:26:57,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:26:57,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-30 01:26:57,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803008126] [2020-11-30 01:26:57,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:26:57,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:57,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:26:57,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:26:57,751 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-11-30 01:26:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:57,806 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-30 01:26:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:26:57,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-30 01:26:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:57,808 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:26:57,808 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 01:26:57,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:26:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 01:26:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-30 01:26:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 01:26:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-30 01:26:57,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-11-30 01:26:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:57,814 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-30 01:26:57,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:26:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-30 01:26:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:26:57,815 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:26:57,815 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:26:58,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:26:58,030 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:26:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:26:58,030 INFO L82 PathProgramCache]: Analyzing trace with hash 758694231, now seen corresponding path program 1 times [2020-11-30 01:26:58,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:26:58,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935464476] [2020-11-30 01:26:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:26:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:26:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:26:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:26:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:26:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 01:26:58,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935464476] [2020-11-30 01:26:58,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:26:58,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:26:58,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692174194] [2020-11-30 01:26:58,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:26:58,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:26:58,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:26:58,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:58,158 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-11-30 01:26:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:26:58,174 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-11-30 01:26:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:26:58,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-11-30 01:26:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:26:58,175 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:26:58,175 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:26:58,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:26:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:26:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:26:58,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:26:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:26:58,177 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-11-30 01:26:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:26:58,177 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:26:58,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:26:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:26:58,177 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:26:58,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:26:58,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:26:58,195 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:26:58,195 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 01:26:58,195 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:26:58,195 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 01:26:58,195 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 01:26:58,195 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-30 01:26:58,195 INFO L274 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-11-30 01:26:58,196 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-11-30 01:26:58,196 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-30 01:26:58,196 INFO L274 CegarLoopResult]: For program point L13(lines 13 19) no Hoare annotation was computed. [2020-11-30 01:26:58,196 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-30 01:26:58,196 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2020-11-30 01:26:58,196 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2020-11-30 01:26:58,196 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-11-30 01:26:58,196 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-11-30 01:26:58,196 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-11-30 01:26:58,196 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-30 01:26:58,196 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-11-30 01:26:58,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:26:58 BoogieIcfgContainer [2020-11-30 01:26:58,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:26:58,200 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:26:58,200 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:26:58,201 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:26:58,201 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:26:56" (3/4) ... [2020-11-30 01:26:58,204 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:26:58,210 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-30 01:26:58,214 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-30 01:26:58,214 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 01:26:58,214 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:26:58,214 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:26:58,248 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3dbb6e90-8a3f-4ad3-86d7-06c7112b790e/bin/uautomizer/witness.graphml [2020-11-30 01:26:58,249 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:26:58,253 INFO L168 Benchmark]: Toolchain (without parser) took 2143.01 ms. Allocated memory is still 102.8 MB. Free memory was 70.9 MB in the beginning and 42.3 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:26:58,254 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 75.5 MB. Free memory was 35.4 MB in the beginning and 35.3 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:26:58,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.99 ms. Allocated memory is still 102.8 MB. Free memory was 70.7 MB in the beginning and 80.7 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:26:58,255 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.53 ms. Allocated memory is still 102.8 MB. Free memory was 80.7 MB in the beginning and 79.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:26:58,255 INFO L168 Benchmark]: Boogie Preprocessor took 33.39 ms. Allocated memory is still 102.8 MB. Free memory was 79.1 MB in the beginning and 78.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:26:58,256 INFO L168 Benchmark]: RCFGBuilder took 306.37 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 67.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:26:58,257 INFO L168 Benchmark]: TraceAbstraction took 1482.00 ms. Allocated memory is still 102.8 MB. Free memory was 66.6 MB in the beginning and 44.4 MB in the end (delta: 22.1 MB). Peak memory consumption was 25.0 MB. Max. memory is 16.1 GB. [2020-11-30 01:26:58,257 INFO L168 Benchmark]: Witness Printer took 48.32 ms. Allocated memory is still 102.8 MB. Free memory was 44.4 MB in the beginning and 42.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:26:58,260 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 75.5 MB. Free memory was 35.4 MB in the beginning and 35.3 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 232.99 ms. Allocated memory is still 102.8 MB. Free memory was 70.7 MB in the beginning and 80.7 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.53 ms. Allocated memory is still 102.8 MB. Free memory was 80.7 MB in the beginning and 79.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.39 ms. Allocated memory is still 102.8 MB. Free memory was 79.1 MB in the beginning and 78.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 306.37 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 67.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1482.00 ms. Allocated memory is still 102.8 MB. Free memory was 66.6 MB in the beginning and 44.4 MB in the end (delta: 22.1 MB). Peak memory consumption was 25.0 MB. Max. memory is 16.1 GB. * Witness Printer took 48.32 ms. Allocated memory is still 102.8 MB. Free memory was 44.4 MB in the beginning and 42.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 7 SDslu, 208 SDs, 0 SdLazy, 60 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 2274 SizeOfPredicates, 2 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 23/27 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 correct! Received shutdown request...