./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4f.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_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/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 eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 18:26:56,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:26:56,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:26:56,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:26:56,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:26:56,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:26:56,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:26:56,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:26:56,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:26:56,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:26:56,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:26:56,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:26:56,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:26:56,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:26:56,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:26:56,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:26:56,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:26:56,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:26:56,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:26:56,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:26:56,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:26:56,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:26:56,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:26:56,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:26:56,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:26:56,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:26:56,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:26:56,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:26:56,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:26:56,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:26:56,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:26:56,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:26:56,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:26:56,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:26:56,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:26:56,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:26:56,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:26:56,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:26:56,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:26:56,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:26:56,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:26:56,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:26:56,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:26:56,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:26:56,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:26:56,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:26:56,261 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:26:56,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:26:56,262 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:26:56,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:26:56,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:26:56,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:26:56,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:26:56,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:26:56,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:26:56,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:26:56,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:26:56,265 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:26:56,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:26:56,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:26:56,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:26:56,266 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:26:56,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:26:56,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:26:56,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:26:56,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:26:56,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:26:56,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:26:56,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:26:56,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:26:56,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:26:56,268 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_acabc5e6-58f1-42fb-9dc2-204a24beeefb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 [2020-11-29 18:26:56,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:26:56,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:26:56,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:26:56,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:26:56,627 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:26:56,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ifeqn4f.c [2020-11-29 18:26:56,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/data/59ec26852/d524ce841a4b424d8d5c86626bcb5350/FLAG869f7d14e [2020-11-29 18:26:57,142 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:26:57,143 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/sv-benchmarks/c/array-fpi/ifeqn4f.c [2020-11-29 18:26:57,157 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/data/59ec26852/d524ce841a4b424d8d5c86626bcb5350/FLAG869f7d14e [2020-11-29 18:26:57,532 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/data/59ec26852/d524ce841a4b424d8d5c86626bcb5350 [2020-11-29 18:26:57,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:26:57,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:26:57,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:26:57,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:26:57,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:26:57,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a25bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57, skipping insertion in model container [2020-11-29 18:26:57,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:26:57,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:26:57,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:26:57,838 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:26:57,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:26:57,874 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:26:57,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57 WrapperNode [2020-11-29 18:26:57,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:26:57,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:26:57,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:26:57,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:26:57,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:26:57,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:26:57,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:26:57,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:26:57,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... [2020-11-29 18:26:57,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:26:57,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:26:57,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:26:57,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:26:57,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/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 18:26:58,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:26:58,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:26:58,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:26:58,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 18:26:58,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:26:58,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:26:58,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:26:58,352 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:26:58,353 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 18:26:58,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:58 BoogieIcfgContainer [2020-11-29 18:26:58,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:26:58,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:26:58,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:26:58,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:26:58,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:26:57" (1/3) ... [2020-11-29 18:26:58,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15904bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:26:58, skipping insertion in model container [2020-11-29 18:26:58,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:57" (2/3) ... [2020-11-29 18:26:58,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15904bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:26:58, skipping insertion in model container [2020-11-29 18:26:58,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:58" (3/3) ... [2020-11-29 18:26:58,378 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-11-29 18:26:58,388 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:26:58,391 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:26:58,403 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:26:58,428 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:26:58,428 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:26:58,429 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:26:58,429 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:26:58,429 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:26:58,429 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:26:58,429 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:26:58,429 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:26:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-29 18:26:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 18:26:58,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:26:58,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:58,450 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:26:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-11-29 18:26:58,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:58,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154441449] [2020-11-29 18:26:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:58,636 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 18:26:58,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154441449] [2020-11-29 18:26:58,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:26:58,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 18:26:58,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942735456] [2020-11-29 18:26:58,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 18:26:58,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:58,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 18:26:58,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 18:26:58,667 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-29 18:26:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:58,688 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-11-29 18:26:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 18:26:58,690 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-29 18:26:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:26:58,700 INFO L225 Difference]: With dead ends: 43 [2020-11-29 18:26:58,701 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 18:26:58,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 18:26:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 18:26:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-29 18:26:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-29 18:26:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-11-29 18:26:58,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-11-29 18:26:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:26:58,758 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-11-29 18:26:58,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 18:26:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-11-29 18:26:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 18:26:58,760 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:26:58,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:58,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:26:58,762 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:26:58,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:58,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-11-29 18:26:58,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:58,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062665625] [2020-11-29 18:26:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:58,976 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 18:26:58,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062665625] [2020-11-29 18:26:58,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:26:58,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:26:58,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322279130] [2020-11-29 18:26:58,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:26:58,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:58,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:26:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:26:58,981 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-11-29 18:26:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:59,112 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-11-29 18:26:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:26:59,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-29 18:26:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:26:59,116 INFO L225 Difference]: With dead ends: 45 [2020-11-29 18:26:59,116 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 18:26:59,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:26:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 18:26:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-29 18:26:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 18:26:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-29 18:26:59,122 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-11-29 18:26:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:26:59,122 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-29 18:26:59,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:26:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-29 18:26:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 18:26:59,123 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:26:59,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:59,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:26:59,124 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:26:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-11-29 18:26:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:59,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423633865] [2020-11-29 18:26:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:59,168 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:26:59,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923447842] [2020-11-29 18:26:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/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 18:26:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:59,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:26:59,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:59,329 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-29 18:26:59,329 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:26:59,333 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:26:59,333 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:26:59,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-11-29 18:26:59,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:26:59,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423633865] [2020-11-29 18:26:59,439 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:26:59,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923447842] [2020-11-29 18:26:59,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:26:59,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:26:59,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516180663] [2020-11-29 18:26:59,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:26:59,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:59,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:26:59,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:26:59,441 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-11-29 18:26:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:59,534 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-11-29 18:26:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:26:59,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-29 18:26:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:26:59,539 INFO L225 Difference]: With dead ends: 31 [2020-11-29 18:26:59,539 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 18:26:59,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:26:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 18:26:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-11-29 18:26:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 18:26:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-29 18:26:59,545 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-11-29 18:26:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:26:59,545 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-29 18:26:59,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:26:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-29 18:26:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 18:26:59,546 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:26:59,546 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:59,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 18:26:59,747 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:26:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:59,748 INFO L82 PathProgramCache]: Analyzing trace with hash -689607655, now seen corresponding path program 1 times [2020-11-29 18:26:59,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:59,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663369745] [2020-11-29 18:26:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:59,774 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:26:59,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795879375] [2020-11-29 18:26:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/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 18:26:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:59,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:26:59,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:26:59,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663369745] [2020-11-29 18:26:59,955 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:26:59,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795879375] [2020-11-29 18:26:59,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:26:59,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 18:26:59,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503554675] [2020-11-29 18:26:59,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:26:59,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:59,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:26:59,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:26:59,958 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-11-29 18:27:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:27:00,132 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-11-29 18:27:00,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:27:00,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-29 18:27:00,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:27:00,136 INFO L225 Difference]: With dead ends: 65 [2020-11-29 18:27:00,136 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 18:27:00,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:27:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 18:27:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-11-29 18:27:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 18:27:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-11-29 18:27:00,142 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-11-29 18:27:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:27:00,143 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-11-29 18:27:00,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:27:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-11-29 18:27:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 18:27:00,144 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:27:00,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:27:00,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:27:00,345 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:27:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:27:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash 489568854, now seen corresponding path program 1 times [2020-11-29 18:27:00,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:27:00,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440792979] [2020-11-29 18:27:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:27:00,366 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:27:00,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731165031] [2020-11-29 18:27:00,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/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 18:27:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:27:00,463 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:27:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:27:00,491 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:27:00,527 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:27:00,527 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 18:27:00,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:27:00,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:27:00 BoogieIcfgContainer [2020-11-29 18:27:00,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:27:00,810 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:27:00,810 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:27:00,810 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:27:00,811 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:58" (3/4) ... [2020-11-29 18:27:00,812 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:27:00,873 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_acabc5e6-58f1-42fb-9dc2-204a24beeefb/bin/uautomizer/witness.graphml [2020-11-29 18:27:00,873 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:27:00,875 INFO L168 Benchmark]: Toolchain (without parser) took 3337.53 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 62.4 MB in the beginning and 88.2 MB in the end (delta: -25.9 MB). Peak memory consumption was 44.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:27:00,875 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 92.3 MB. Free memory was 51.4 MB in the beginning and 51.4 MB in the end (delta: 38.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:27:00,876 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.86 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 69.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:27:00,877 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.25 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 67.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:27:00,878 INFO L168 Benchmark]: Boogie Preprocessor took 25.55 ms. Allocated memory is still 92.3 MB. Free memory was 67.9 MB in the beginning and 66.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:27:00,879 INFO L168 Benchmark]: RCFGBuilder took 418.03 ms. Allocated memory is still 92.3 MB. Free memory was 66.8 MB in the beginning and 51.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 18:27:00,880 INFO L168 Benchmark]: TraceAbstraction took 2452.21 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 51.4 MB in the beginning and 40.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. [2020-11-29 18:27:00,880 INFO L168 Benchmark]: Witness Printer took 63.60 ms. Allocated memory is still 111.1 MB. Free memory was 39.9 MB in the beginning and 88.2 MB in the end (delta: -48.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:27:00,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 92.3 MB. Free memory was 51.4 MB in the beginning and 51.4 MB in the end (delta: 38.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 320.86 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 69.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.25 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 67.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.55 ms. Allocated memory is still 92.3 MB. Free memory was 67.9 MB in the beginning and 66.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 418.03 ms. Allocated memory is still 92.3 MB. Free memory was 66.8 MB in the beginning and 51.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2452.21 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 51.4 MB in the beginning and 40.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. * Witness Printer took 63.60 ms. Allocated memory is still 111.1 MB. Free memory was 39.9 MB in the beginning and 88.2 MB in the end (delta: -48.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=2] [L31] COND TRUE i