./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_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_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/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 c904d43a56f7d48de83a40717b42c35f909963a3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 18:29:06,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:29:06,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:29:06,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:29:06,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:29:06,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:29:06,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:29:06,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:29:06,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:29:06,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:29:06,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:29:06,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:29:06,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:29:06,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:29:06,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:29:06,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:29:06,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:29:06,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:29:06,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:29:06,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:29:06,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:29:06,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:29:06,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:29:06,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:29:06,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:29:06,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:29:06,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:29:06,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:29:06,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:29:06,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:29:06,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:29:06,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:29:06,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:29:06,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:29:06,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:29:06,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:29:06,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:29:06,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:29:06,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:29:06,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:29:06,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:29:06,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:29:06,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:29:06,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:29:06,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:29:06,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:29:06,152 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:29:06,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:29:06,152 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:29:06,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:29:06,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:29:06,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:29:06,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:29:06,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:29:06,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:29:06,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:29:06,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:29:06,156 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:29:06,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:29:06,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:29:06,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:29:06,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:29:06,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:29:06,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:29:06,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:29:06,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:29:06,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:29:06,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:29:06,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:29:06,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:29:06,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:29:06,159 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_32f20665-46f9-4ec3-8629-14e3606c4afe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c904d43a56f7d48de83a40717b42c35f909963a3 [2020-11-29 18:29:06,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:29:06,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:29:06,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:29:06,471 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:29:06,472 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:29:06,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2020-11-29 18:29:06,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/data/abe97d476/d9390d7b5b5e4709a768ee77fba6744e/FLAGb77ae800f [2020-11-29 18:29:06,961 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:29:06,962 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2020-11-29 18:29:06,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/data/abe97d476/d9390d7b5b5e4709a768ee77fba6744e/FLAGb77ae800f [2020-11-29 18:29:07,380 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/data/abe97d476/d9390d7b5b5e4709a768ee77fba6744e [2020-11-29 18:29:07,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:29:07,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:29:07,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:29:07,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:29:07,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:29:07,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d44188b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07, skipping insertion in model container [2020-11-29 18:29:07,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:29:07,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:29:07,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:29:07,644 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:29:07,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:29:07,702 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:29:07,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07 WrapperNode [2020-11-29 18:29:07,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:29:07,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:29:07,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:29:07,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:29:07,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:29:07,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:29:07,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:29:07,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:29:07,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... [2020-11-29 18:29:07,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:29:07,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:29:07,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:29:07,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:29:07,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/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 [2020-11-29 18:29:07,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:29:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:29:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-11-29 18:29:07,900 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-11-29 18:29:07,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:29:07,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:29:07,901 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-29 18:29:07,901 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-29 18:29:08,172 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:29:08,172 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 18:29:08,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:29:08 BoogieIcfgContainer [2020-11-29 18:29:08,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:29:08,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:29:08,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:29:08,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:29:08,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:29:07" (1/3) ... [2020-11-29 18:29:08,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4897f76f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:29:08, skipping insertion in model container [2020-11-29 18:29:08,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:29:07" (2/3) ... [2020-11-29 18:29:08,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4897f76f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:29:08, skipping insertion in model container [2020-11-29 18:29:08,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:29:08" (3/3) ... [2020-11-29 18:29:08,212 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-11-29 18:29:08,227 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:29:08,234 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:29:08,247 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:29:08,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:29:08,272 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:29:08,272 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:29:08,272 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:29:08,272 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:29:08,273 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:29:08,273 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:29:08,273 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:29:08,289 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-29 18:29:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 18:29:08,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:29:08,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:29:08,295 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:29:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:29:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash 809990150, now seen corresponding path program 1 times [2020-11-29 18:29:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:29:08,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044521254] [2020-11-29 18:29:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:29:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:08,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:29:08,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044521254] [2020-11-29 18:29:08,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:29:08,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:29:08,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655394935] [2020-11-29 18:29:08,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:29:08,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:29:08,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:29:08,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:29:08,605 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-11-29 18:29:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:29:08,685 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-29 18:29:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:29:08,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 18:29:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:29:08,695 INFO L225 Difference]: With dead ends: 32 [2020-11-29 18:29:08,696 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 18:29:08,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:29:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 18:29:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-29 18:29:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 18:29:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-29 18:29:08,750 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2020-11-29 18:29:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:29:08,751 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-29 18:29:08,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:29:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-29 18:29:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 18:29:08,755 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:29:08,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:29:08,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:29:08,756 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:29:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:29:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1198290194, now seen corresponding path program 1 times [2020-11-29 18:29:08,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:29:08,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037683420] [2020-11-29 18:29:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:29:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:08,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:08,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:29:08,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037683420] [2020-11-29 18:29:08,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:29:08,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 18:29:08,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365926712] [2020-11-29 18:29:08,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:29:08,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:29:08,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:29:08,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:29:08,934 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2020-11-29 18:29:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:29:09,051 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-11-29 18:29:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:29:09,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-11-29 18:29:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:29:09,055 INFO L225 Difference]: With dead ends: 30 [2020-11-29 18:29:09,055 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 18:29:09,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:29:09,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 18:29:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-11-29 18:29:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 18:29:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-29 18:29:09,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-11-29 18:29:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:29:09,065 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-29 18:29:09,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:29:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-29 18:29:09,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 18:29:09,069 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:29:09,069 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] [2020-11-29 18:29:09,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:29:09,070 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:29:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:29:09,071 INFO L82 PathProgramCache]: Analyzing trace with hash 602004046, now seen corresponding path program 1 times [2020-11-29 18:29:09,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:29:09,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130566516] [2020-11-29 18:29:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:29:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:09,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:09,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:09,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 18:29:09,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130566516] [2020-11-29 18:29:09,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718150394] [2020-11-29 18:29:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/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 [2020-11-29 18:29:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:09,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:29:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:29:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 18:29:09,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:29:09,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-11-29 18:29:09,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767448692] [2020-11-29 18:29:09,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 18:29:09,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:29:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:29:09,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:29:09,483 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 11 states. [2020-11-29 18:29:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:29:09,644 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-29 18:29:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:29:09,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-11-29 18:29:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:29:09,646 INFO L225 Difference]: With dead ends: 36 [2020-11-29 18:29:09,646 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 18:29:09,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:29:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 18:29:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-11-29 18:29:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 18:29:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-11-29 18:29:09,656 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-11-29 18:29:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:29:09,657 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-11-29 18:29:09,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 18:29:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-11-29 18:29:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 18:29:09,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:29:09,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:29:09,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 18:29:09,874 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:29:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:29:09,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1171563466, now seen corresponding path program 1 times [2020-11-29 18:29:09,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:29:09,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788533835] [2020-11-29 18:29:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:29:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:09,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:09,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:29:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788533835] [2020-11-29 18:29:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010056136] [2020-11-29 18:29:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/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 [2020-11-29 18:29:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:29:10,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:29:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:29:10,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:29:10,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-11-29 18:29:10,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390146303] [2020-11-29 18:29:10,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 18:29:10,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:29:10,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:29:10,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:29:10,266 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 12 states. [2020-11-29 18:29:10,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:29:10,392 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-29 18:29:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:29:10,396 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-11-29 18:29:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:29:10,397 INFO L225 Difference]: With dead ends: 42 [2020-11-29 18:29:10,397 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 18:29:10,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-29 18:29:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 18:29:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-11-29 18:29:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 18:29:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-29 18:29:10,411 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-11-29 18:29:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:29:10,412 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-29 18:29:10,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 18:29:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-29 18:29:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 18:29:10,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:29:10,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:29:10,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:29:10,630 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:29:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:29:10,631 INFO L82 PathProgramCache]: Analyzing trace with hash -232513386, now seen corresponding path program 2 times [2020-11-29 18:29:10,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:29:10,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369581073] [2020-11-29 18:29:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:29:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 18:29:10,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369581073] [2020-11-29 18:29:10,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484153580] [2020-11-29 18:29:10,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/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 [2020-11-29 18:29:10,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:29:10,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:29:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:29:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:29:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 18:29:11,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:29:11,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-11-29 18:29:11,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285083000] [2020-11-29 18:29:11,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:29:11,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:29:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:29:11,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:29:11,037 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-11-29 18:29:11,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:29:11,190 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-29 18:29:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:29:11,192 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-11-29 18:29:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:29:11,194 INFO L225 Difference]: With dead ends: 48 [2020-11-29 18:29:11,194 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 18:29:11,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-11-29 18:29:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 18:29:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2020-11-29 18:29:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 18:29:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-29 18:29:11,216 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2020-11-29 18:29:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:29:11,218 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-29 18:29:11,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:29:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-29 18:29:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 18:29:11,221 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:29:11,221 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:29:11,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:29:11,434 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:29:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:29:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1788325506, now seen corresponding path program 2 times [2020-11-29 18:29:11,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:29:11,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430973058] [2020-11-29 18:29:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:29:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:11,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:11,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:11,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:11,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:11,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-29 18:29:11,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430973058] [2020-11-29 18:29:11,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748737790] [2020-11-29 18:29:11,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/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 [2020-11-29 18:29:11,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:29:11,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:29:11,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 18:29:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:29:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-29 18:29:12,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:29:12,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-11-29 18:29:12,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431903668] [2020-11-29 18:29:12,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 18:29:12,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:29:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:29:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:29:12,037 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-11-29 18:29:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:29:12,173 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-11-29 18:29:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 18:29:12,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-11-29 18:29:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:29:12,176 INFO L225 Difference]: With dead ends: 54 [2020-11-29 18:29:12,176 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 18:29:12,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:29:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 18:29:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-11-29 18:29:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 18:29:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-29 18:29:12,183 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2020-11-29 18:29:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:29:12,184 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-29 18:29:12,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 18:29:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-29 18:29:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 18:29:12,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:29:12,186 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:29:12,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:29:12,414 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:29:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:29:12,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1387509026, now seen corresponding path program 3 times [2020-11-29 18:29:12,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:29:12,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927377902] [2020-11-29 18:29:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:29:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:12,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:12,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:12,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:12,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:12,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:12,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:12,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-29 18:29:12,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927377902] [2020-11-29 18:29:12,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146798855] [2020-11-29 18:29:12,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/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 [2020-11-29 18:29:12,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 18:29:12,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:29:12,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:29:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:29:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-29 18:29:12,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:29:12,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 15 [2020-11-29 18:29:12,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196657393] [2020-11-29 18:29:12,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 18:29:12,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:29:12,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:29:12,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:29:12,912 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2020-11-29 18:29:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:29:13,106 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-11-29 18:29:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:29:13,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-11-29 18:29:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:29:13,109 INFO L225 Difference]: With dead ends: 60 [2020-11-29 18:29:13,109 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 18:29:13,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-11-29 18:29:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 18:29:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-29 18:29:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 18:29:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-29 18:29:13,120 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 46 [2020-11-29 18:29:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:29:13,121 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-29 18:29:13,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 18:29:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-29 18:29:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 18:29:13,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:29:13,128 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:29:13,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 18:29:13,344 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:29:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:29:13,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1255697094, now seen corresponding path program 3 times [2020-11-29 18:29:13,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:29:13,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098205174] [2020-11-29 18:29:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:29:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:13,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:13,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:13,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:13,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:13,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:13,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:13,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 18:29:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:29:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-11-29 18:29:13,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098205174] [2020-11-29 18:29:13,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197707237] [2020-11-29 18:29:13,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/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 [2020-11-29 18:29:13,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 18:29:13,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:29:13,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 18:29:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:29:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-11-29 18:29:13,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:29:13,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 16 [2020-11-29 18:29:13,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113271703] [2020-11-29 18:29:13,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:29:13,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:29:13,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:29:13,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-11-29 18:29:13,843 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-11-29 18:29:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:29:14,121 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-11-29 18:29:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 18:29:14,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-11-29 18:29:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:29:14,122 INFO L225 Difference]: With dead ends: 36 [2020-11-29 18:29:14,122 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 18:29:14,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-11-29 18:29:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 18:29:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 18:29:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 18:29:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 18:29:14,123 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-11-29 18:29:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:29:14,124 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:29:14,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:29:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 18:29:14,124 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 18:29:14,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:29:14,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 18:29:14,360 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point id2EXIT(lines 14 17) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L277 CegarLoopResult]: At program point id2ENTRY(lines 14 17) the Hoare annotation is: true [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point id2FINAL(lines 14 17) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-11-29 18:29:14,360 INFO L274 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-11-29 18:29:14,361 INFO L270 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 5)) [2020-11-29 18:29:14,361 INFO L274 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-11-29 18:29:14,361 INFO L274 CegarLoopResult]: For program point L19(lines 19 25) no Hoare annotation was computed. [2020-11-29 18:29:14,361 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-29 18:29:14,361 INFO L274 CegarLoopResult]: For program point idFINAL(lines 9 12) no Hoare annotation was computed. [2020-11-29 18:29:14,361 INFO L270 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-11-29 18:29:14,361 INFO L274 CegarLoopResult]: For program point idEXIT(lines 9 12) no Hoare annotation was computed. [2020-11-29 18:29:14,361 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-11-29 18:29:14,361 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-11-29 18:29:14,361 INFO L277 CegarLoopResult]: At program point idENTRY(lines 9 12) the Hoare annotation is: true [2020-11-29 18:29:14,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:29:14 BoogieIcfgContainer [2020-11-29 18:29:14,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:29:14,366 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:29:14,366 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:29:14,366 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:29:14,367 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:29:08" (3/4) ... [2020-11-29 18:29:14,370 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 18:29:14,376 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2020-11-29 18:29:14,376 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-29 18:29:14,380 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 18:29:14,381 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 18:29:14,381 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 18:29:14,381 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 18:29:14,414 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_32f20665-46f9-4ec3-8629-14e3606c4afe/bin/uautomizer/witness.graphml [2020-11-29 18:29:14,415 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:29:14,416 INFO L168 Benchmark]: Toolchain (without parser) took 7030.05 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 48.7 MB in the beginning and 87.1 MB in the end (delta: -38.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:29:14,417 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 79.7 MB. Free memory was 39.4 MB in the beginning and 39.3 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:29:14,417 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.03 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 48.5 MB in the beginning and 74.1 MB in the end (delta: -25.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:29:14,418 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.96 ms. Allocated memory is still 96.5 MB. Free memory was 74.1 MB in the beginning and 72.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:29:14,418 INFO L168 Benchmark]: Boogie Preprocessor took 49.43 ms. Allocated memory is still 96.5 MB. Free memory was 72.5 MB in the beginning and 71.5 MB in the end (delta: 970.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:29:14,419 INFO L168 Benchmark]: RCFGBuilder took 370.29 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 59.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:29:14,419 INFO L168 Benchmark]: TraceAbstraction took 6181.62 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 89.2 MB in the end (delta: -29.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:29:14,419 INFO L168 Benchmark]: Witness Printer took 48.62 ms. Allocated memory is still 117.4 MB. Free memory was 89.2 MB in the beginning and 87.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:29:14,422 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 79.7 MB. Free memory was 39.4 MB in the beginning and 39.3 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.03 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 48.5 MB in the beginning and 74.1 MB in the end (delta: -25.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.96 ms. Allocated memory is still 96.5 MB. Free memory was 74.1 MB in the beginning and 72.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.43 ms. Allocated memory is still 96.5 MB. Free memory was 72.5 MB in the beginning and 71.5 MB in the end (delta: 970.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 370.29 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 59.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6181.62 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 89.2 MB in the end (delta: -29.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 48.62 ms. Allocated memory is still 117.4 MB. Free memory was 89.2 MB in the beginning and 87.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 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 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.0s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 154 SDtfs, 109 SDslu, 959 SDs, 0 SdLazy, 538 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 384 GetRequests, 273 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=6, 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, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 15 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 470 NumberOfCodeBlocks, 470 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 456 ConstructedInterpolants, 0 QuantifiedInterpolants, 46512 SizeOfPredicates, 33 NumberOfNonLiveVariables, 690 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 282/360 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...