./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s4iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s4iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 98b440d2018d3020f67dce8008e7aad4265ed1f1 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2021-10-11 02:31:42,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:31:42,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:31:42,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:31:42,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:31:42,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:31:42,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:31:42,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:31:42,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:31:42,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:31:42,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:31:42,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:31:42,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:31:42,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:31:42,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:31:42,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:31:42,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:31:42,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:31:42,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:31:42,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:31:42,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:31:42,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:31:42,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:31:42,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:31:42,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:31:42,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:31:42,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:31:42,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:31:42,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:31:42,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:31:42,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:31:42,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:31:42,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:31:42,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:31:42,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:31:42,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:31:42,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:31:42,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:31:42,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:31:42,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:31:42,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:31:42,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:31:42,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:31:42,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:31:42,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:31:42,743 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:31:42,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:31:42,744 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:31:42,744 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:31:42,744 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:31:42,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:31:42,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:31:42,745 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:31:42,746 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:31:42,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:31:42,746 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:31:42,747 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:31:42,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:31:42,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:31:42,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:31:42,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:31:42,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:31:42,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:31:42,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:31:42,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:31:42,749 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:31:42,749 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:31:42,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:31:42,750 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:31:42,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:31:42,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:31:42,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:31:42,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:42,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:31:42,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:31:42,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:31:42,753 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:31:42,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:31:42,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:31:42,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:31:42,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:31:42,755 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98b440d2018d3020f67dce8008e7aad4265ed1f1 [2021-10-11 02:31:43,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:31:43,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:31:43,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:31:43,054 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:31:43,056 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:31:43,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/s4iff.c [2021-10-11 02:31:43,130 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/data/a87bf46a8/4b9e47882d944499a6b8d0c852eaa937/FLAGfb3526798 [2021-10-11 02:31:43,642 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:31:43,643 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/sv-benchmarks/c/array-fpi/s4iff.c [2021-10-11 02:31:43,655 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/data/a87bf46a8/4b9e47882d944499a6b8d0c852eaa937/FLAGfb3526798 [2021-10-11 02:31:44,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/data/a87bf46a8/4b9e47882d944499a6b8d0c852eaa937 [2021-10-11 02:31:44,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:31:44,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:31:44,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:44,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:31:44,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:31:44,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b63096c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44, skipping insertion in model container [2021-10-11 02:31:44,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:31:44,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:31:44,205 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/sv-benchmarks/c/array-fpi/s4iff.c[588,601] [2021-10-11 02:31:44,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:44,245 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:31:44,258 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/sv-benchmarks/c/array-fpi/s4iff.c[588,601] [2021-10-11 02:31:44,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:44,281 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:31:44,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44 WrapperNode [2021-10-11 02:31:44,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:44,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:44,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:31:44,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:31:44,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:44,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:31:44,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:31:44,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:31:44,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... [2021-10-11 02:31:44,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:31:44,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:31:44,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:31:44,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:31:44,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:31:44,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:31:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:31:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:31:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:31:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:31:44,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:31:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:31:44,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:31:44,789 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:31:44,803 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:31:44,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:44 BoogieIcfgContainer [2021-10-11 02:31:44,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:31:44,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:31:44,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:31:44,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:31:44,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:44" (1/3) ... [2021-10-11 02:31:44,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c00a684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:44, skipping insertion in model container [2021-10-11 02:31:44,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:44" (2/3) ... [2021-10-11 02:31:44,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c00a684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:44, skipping insertion in model container [2021-10-11 02:31:44,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:44" (3/3) ... [2021-10-11 02:31:44,814 INFO L111 eAbstractionObserver]: Analyzing ICFG s4iff.c [2021-10-11 02:31:44,828 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:31:44,832 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:31:44,843 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:31:44,867 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:31:44,867 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:31:44,867 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:31:44,868 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:31:44,868 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:31:44,868 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:31:44,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:31:44,868 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:31:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-10-11 02:31:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:31:44,887 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:44,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:31:44,889 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1591516051, now seen corresponding path program 1 times [2021-10-11 02:31:44,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:44,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886923443] [2021-10-11 02:31:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:45,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886923443] [2021-10-11 02:31:45,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:45,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:45,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767655371] [2021-10-11 02:31:45,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:45,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:45,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:45,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:45,114 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-10-11 02:31:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:45,147 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-11 02:31:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:45,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:31:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:45,157 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:31:45,157 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:31:45,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:31:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:31:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:31:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-11 02:31:45,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-11 02:31:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:45,191 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-11 02:31:45,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-11 02:31:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:31:45,192 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:45,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:45,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:31:45,193 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:45,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2098745102, now seen corresponding path program 1 times [2021-10-11 02:31:45,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:45,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925596420] [2021-10-11 02:31:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:45,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925596420] [2021-10-11 02:31:45,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:45,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:45,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505560470] [2021-10-11 02:31:45,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:45,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:45,286 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2021-10-11 02:31:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:45,318 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-11 02:31:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:45,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:31:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:45,320 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:31:45,320 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:31:45,321 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 [2021-10-11 02:31:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:31:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:31:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:31:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 02:31:45,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-11 02:31:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:45,324 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 02:31:45,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 02:31:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:31:45,325 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:45,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:45,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:31:45,325 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:45,326 INFO L82 PathProgramCache]: Analyzing trace with hash -636631016, now seen corresponding path program 1 times [2021-10-11 02:31:45,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:45,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423461660] [2021-10-11 02:31:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:45,365 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:31:45,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969573446] [2021-10-11 02:31:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:31:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:45,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-11 02:31:45,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:45,524 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-11 02:31:45,535 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:45,549 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:45,557 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-11 02:31:45,558 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:45,574 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:45,581 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:31:45,581 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-10-11 02:31:45,631 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-11 02:31:45,633 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:45,646 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:45,647 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:31:45,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-10-11 02:31:45,731 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-11 02:31:45,735 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:45,745 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:45,752 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 02:31:45,753 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:31 [2021-10-11 02:31:45,850 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:31:45,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:31:45,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:31:45,889 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:31:45,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:31:45,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:31:45,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-10-11 02:31:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:45,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:46,008 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:31:55,005 WARN L197 SmtUtils]: Spent 7.78 s on a formula simplification that was a NOOP. DAG size: 42 [2021-10-11 02:31:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:55,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423461660] [2021-10-11 02:31:55,025 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:55,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969573446] [2021-10-11 02:31:55,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1194322596] [2021-10-11 02:31:55,049 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:55,049 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:55,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:55,060 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:55,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:55,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:55,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:58,084 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:58,300 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:31:58,472 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:31:58,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:58,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:31:58,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-11 02:31:58,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946852362] [2021-10-11 02:31:58,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:31:58,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:58,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:31:58,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2021-10-11 02:31:58,506 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 12 states. [2021-10-11 02:31:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:58,675 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-11 02:31:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:31:58,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2021-10-11 02:31:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:58,678 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:31:58,678 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:31:58,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2021-10-11 02:31:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:31:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-11 02:31:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:31:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:31:58,682 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:31:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:58,682 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:31:58,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:31:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:31:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:31:58,682 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:58,682 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:58,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:31:58,883 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:58,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1739232690, now seen corresponding path program 2 times [2021-10-11 02:31:58,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:58,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922645293] [2021-10-11 02:31:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:58,896 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:31:58,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550848942] [2021-10-11 02:31:58,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:31:58,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:31:58,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:31:58,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:31:58,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:58,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:59,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922645293] [2021-10-11 02:31:59,038 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:59,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550848942] [2021-10-11 02:31:59,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195875128] [2021-10-11 02:31:59,041 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:59,041 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:59,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:59,041 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:59,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:59,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:59,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:59,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:59,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:59,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:59,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:59,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:59,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:03,913 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:04,101 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:32:04,280 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:32:04,311 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:04,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:32:04,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 02:32:04,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139140624] [2021-10-11 02:32:04,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:32:04,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:04,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:32:04,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:32:04,313 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 8 states. [2021-10-11 02:32:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:04,407 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-10-11 02:32:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:32:04,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2021-10-11 02:32:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:04,408 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:32:04,408 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:32:04,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:32:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:32:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2021-10-11 02:32:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:32:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 02:32:04,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-10-11 02:32:04,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:04,412 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 02:32:04,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:32:04,412 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 02:32:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:32:04,412 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:04,412 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:04,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:04,626 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1542522717, now seen corresponding path program 3 times [2021-10-11 02:32:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:04,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625835336] [2021-10-11 02:32:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:04,652 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:32:04,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507798932] [2021-10-11 02:32:04,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:04,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:32:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:32:04,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:04,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:04,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625835336] [2021-10-11 02:32:04,827 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:04,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507798932] [2021-10-11 02:32:04,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868486547] [2021-10-11 02:32:04,831 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:32:04,831 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:04,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:04,832 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:04,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:04,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:08,438 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:08,643 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:32:08,832 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:32:08,863 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:08,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:32:08,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-11 02:32:08,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202061030] [2021-10-11 02:32:08,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:32:08,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:08,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:32:08,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:32:08,865 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 9 states. [2021-10-11 02:32:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:08,973 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-11 02:32:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:32:08,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-10-11 02:32:08,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:08,976 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:32:08,976 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:32:08,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:32:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:32:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:32:08,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:32:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:32:08,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-10-11 02:32:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:08,980 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:32:08,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:32:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:32:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:32:08,980 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:08,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:09,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-11 02:32:09,188 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash 573521677, now seen corresponding path program 4 times [2021-10-11 02:32:09,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:09,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072986466] [2021-10-11 02:32:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:09,206 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:32:09,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459527435] [2021-10-11 02:32:09,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:32:09,294 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:32:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:32:09,333 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:32:09,412 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:32:09,412 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:32:09,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:09,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:32:09 BoogieIcfgContainer [2021-10-11 02:32:09,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:32:09,647 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:32:09,647 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:32:09,647 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:32:09,648 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:44" (3/4) ... [2021-10-11 02:32:09,649 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:32:09,713 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f151f634-f0cf-48eb-9bb3-cb157c64970a/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:32:09,713 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:32:09,714 INFO L168 Benchmark]: Toolchain (without parser) took 25705.96 ms. Allocated memory was 113.2 MB in the beginning and 176.2 MB in the end (delta: 62.9 MB). Free memory was 77.6 MB in the beginning and 55.9 MB in the end (delta: 21.7 MB). Peak memory consumption was 84.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:09,714 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory was 83.8 MB in the beginning and 83.8 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:09,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.73 ms. Allocated memory is still 113.2 MB. Free memory was 77.4 MB in the beginning and 87.3 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:09,715 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.41 ms. Allocated memory is still 113.2 MB. Free memory was 87.3 MB in the beginning and 85.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:09,715 INFO L168 Benchmark]: Boogie Preprocessor took 24.11 ms. Allocated memory is still 113.2 MB. Free memory was 85.7 MB in the beginning and 84.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:09,716 INFO L168 Benchmark]: RCFGBuilder took 464.22 ms. Allocated memory is still 113.2 MB. Free memory was 84.6 MB in the beginning and 60.5 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:09,717 INFO L168 Benchmark]: TraceAbstraction took 24838.87 ms. Allocated memory was 113.2 MB in the beginning and 176.2 MB in the end (delta: 62.9 MB). Free memory was 60.0 MB in the beginning and 58.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 66.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:09,717 INFO L168 Benchmark]: Witness Printer took 66.42 ms. Allocated memory is still 176.2 MB. Free memory was 58.0 MB in the beginning and 55.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:09,720 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory was 83.8 MB in the beginning and 83.8 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.73 ms. Allocated memory is still 113.2 MB. Free memory was 77.4 MB in the beginning and 87.3 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.41 ms. Allocated memory is still 113.2 MB. Free memory was 87.3 MB in the beginning and 85.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.11 ms. Allocated memory is still 113.2 MB. Free memory was 85.7 MB in the beginning and 84.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 464.22 ms. Allocated memory is still 113.2 MB. Free memory was 84.6 MB in the beginning and 60.5 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24838.87 ms. Allocated memory was 113.2 MB in the beginning and 176.2 MB in the end (delta: 62.9 MB). Free memory was 60.0 MB in the beginning and 58.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 66.5 MB. Max. memory is 16.1 GB. * Witness Printer took 66.42 ms. Allocated memory is still 176.2 MB. Free memory was 58.0 MB in the beginning and 55.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i