./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF --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 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:21:29,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:21:29,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:21:29,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:21:29,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:21:29,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:21:29,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:21:29,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:21:29,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:21:29,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:21:29,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:21:29,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:21:29,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:21:29,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:21:29,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:21:29,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:21:29,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:21:29,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:21:29,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:21:29,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:21:29,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:21:29,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:21:29,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:21:29,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:21:29,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:21:29,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:21:29,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:21:29,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:21:29,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:21:29,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:21:29,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:21:29,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:21:29,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:21:29,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:21:29,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:21:29,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:21:29,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:21:29,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:21:29,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:21:29,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:21:29,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:21:29,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:21:29,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:21:29,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:21:29,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:21:29,665 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:21:29,665 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:21:29,666 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:21:29,666 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:21:29,666 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:21:29,672 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:21:29,673 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:21:29,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:21:29,674 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:21:29,674 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:21:29,675 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:21:29,675 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:21:29,675 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:21:29,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:21:29,676 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:21:29,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:21:29,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:21:29,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:21:29,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:21:29,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:21:29,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:21:29,677 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:21:29,677 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:21:29,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:21:29,678 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:21:29,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:21:29,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:21:29,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:21:29,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:21:29,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:21:29,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:21:29,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:21:29,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:21:29,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:21:29,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:21:29,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:21:29,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:21:29,682 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_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 [2021-11-12 22:21:29,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:21:29,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:21:29,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:21:29,963 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:21:29,964 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:21:29,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2021-11-12 22:21:30,058 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data/076559641/83d8ff417aa843c88caccb65ae5b9e5b/FLAGe358db8f2 [2021-11-12 22:21:30,540 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:21:30,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2021-11-12 22:21:30,551 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data/076559641/83d8ff417aa843c88caccb65ae5b9e5b/FLAGe358db8f2 [2021-11-12 22:21:30,916 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data/076559641/83d8ff417aa843c88caccb65ae5b9e5b [2021-11-12 22:21:30,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:21:30,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:21:30,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:30,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:21:30,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:21:30,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:30" (1/1) ... [2021-11-12 22:21:30,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed7cecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:30, skipping insertion in model container [2021-11-12 22:21:30,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:30" (1/1) ... [2021-11-12 22:21:30,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:21:30,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:21:31,134 WARN L228 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_c60d84f1-2744-4482-8ab3-12ceea485094/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2021-11-12 22:21:31,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:31,161 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:21:31,174 WARN L228 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_c60d84f1-2744-4482-8ab3-12ceea485094/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2021-11-12 22:21:31,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:31,194 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:21:31,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31 WrapperNode [2021-11-12 22:21:31,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:31,195 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:21:31,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:21:31,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:21:31,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:21:31,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:21:31,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:21:31,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:21:31,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:21:31,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:21:31,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:21:31,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:21:31,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (1/1) ... [2021-11-12 22:21:31,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:21:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:21:31,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:21:31,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:21:31,332 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:21:31,332 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:21:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:21:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:21:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:21:31,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:21:31,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:21:31,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:21:31,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:21:31,564 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:21:31,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:31 BoogieIcfgContainer [2021-11-12 22:21:31,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:21:31,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:21:31,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:21:31,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:21:31,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:21:30" (1/3) ... [2021-11-12 22:21:31,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7829e6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:21:31, skipping insertion in model container [2021-11-12 22:21:31,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:31" (2/3) ... [2021-11-12 22:21:31,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7829e6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:21:31, skipping insertion in model container [2021-11-12 22:21:31,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:31" (3/3) ... [2021-11-12 22:21:31,594 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.i [2021-11-12 22:21:31,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:21:31,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:21:31,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:21:31,672 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:21:31,673 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:21:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:21:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:21:31,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:31,697 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:31,698 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:31,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash 40099495, now seen corresponding path program 1 times [2021-11-12 22:21:31,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:31,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155486077] [2021-11-12 22:21:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:31,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:21:31,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:31,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155486077] [2021-11-12 22:21:31,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155486077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:31,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:31,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:21:31,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099504772] [2021-11-12 22:21:31,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:31,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:21:31,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:31,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:21:31,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:21:31,996 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:21:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:32,054 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-11-12 22:21:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:21:32,057 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2021-11-12 22:21:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:32,074 INFO L225 Difference]: With dead ends: 35 [2021-11-12 22:21:32,075 INFO L226 Difference]: Without dead ends: 21 [2021-11-12 22:21:32,087 INFO L932 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 [2021-11-12 22:21:32,092 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:32,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 29.47ms Time] [2021-11-12 22:21:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-12 22:21:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-12 22:21:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 22:21:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-11-12 22:21:32,151 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 21 [2021-11-12 22:21:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:32,153 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-11-12 22:21:32,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:21:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-11-12 22:21:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:21:32,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:32,158 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:32,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:21:32,160 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:32,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2056079682, now seen corresponding path program 1 times [2021-11-12 22:21:32,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:32,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947543092] [2021-11-12 22:21:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:32,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:32,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:21:32,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377689077] [2021-11-12 22:21:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:32,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:21:32,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:21:32,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:21:32,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:21:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:32,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:21:32,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:21:32,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:21:32,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:32,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947543092] [2021-11-12 22:21:32,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:21:32,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377689077] [2021-11-12 22:21:32,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377689077] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:32,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:32,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2021-11-12 22:21:32,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292900240] [2021-11-12 22:21:32,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:32,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:21:32,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:21:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:21:32,958 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:21:34,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 22:21:37,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 22:21:39,196 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 22:21:41,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 22:21:43,371 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 22:21:45,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:47,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 22:21:49,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:49,901 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-12 22:21:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:49,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2021-11-12 22:21:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:49,903 INFO L225 Difference]: With dead ends: 33 [2021-11-12 22:21:49,904 INFO L226 Difference]: Without dead ends: 30 [2021-11-12 22:21:49,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:21:49,905 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16135.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.70ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16905.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:49,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 86 Invalid, 51 Unknown, 0 Unchecked, 5.70ms Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 16905.56ms Time] [2021-11-12 22:21:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-12 22:21:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-12 22:21:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:21:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-12 22:21:49,914 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2021-11-12 22:21:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:49,915 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-12 22:21:49,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:21:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-12 22:21:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 22:21:49,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:49,917 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:49,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-12 22:21:50,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:21:50,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:50,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash 190159033, now seen corresponding path program 1 times [2021-11-12 22:21:50,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:50,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654393586] [2021-11-12 22:21:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:50,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:50,139 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 22:21:50,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372633560] [2021-11-12 22:21:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:50,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:21:50,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:21:50,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:21:50,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:21:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:21:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:21:50,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:50,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:50,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654393586] [2021-11-12 22:21:50,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:21:50,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372633560] [2021-11-12 22:21:50,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~b~0#1|] [2021-11-12 22:21:50,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43423904] [2021-11-12 22:21:50,862 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-12 22:21:50,863 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:21:50,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:21:50,873 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:21:50,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:21:50,909 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:50,910 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:50,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:50,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 22:21:50,915 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:50,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:50,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 22:21:50,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-12 22:21:50,936 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-11-12 22:21:50,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:21:50,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 22:21:50,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:50,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 22:21:50,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:50,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 22:21:50,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:21:50,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:50,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:50,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:21:50,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:21:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:21:50,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:21:50,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 22:21:50,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:21:51,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:21:51,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:21:51,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-11-12 22:21:51,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:21:51,030 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:86, output treesize:71 [2021-11-12 22:21:51,035 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,045 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-11-12 22:21:51,051 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-12 22:21:51,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,070 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-11-12 22:21:51,073 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-11-12 22:21:51,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,153 INFO L180 QuantifierPusher]: treesize reduction 27, result has 76.1 percent of original size [2021-11-12 22:21:51,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-12 22:21:51,161 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:21:51,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,193 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:21:51,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,222 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:21:51,228 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-12 22:21:51,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,359 INFO L180 QuantifierPusher]: treesize reduction 27, result has 80.0 percent of original size [2021-11-12 22:21:51,368 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:51,375 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-11-12 22:21:51,387 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-12 22:21:51,400 INFO L180 QuantifierPusher]: treesize reduction 27, result has 81.0 percent of original size [2021-11-12 22:21:51,409 INFO L185 QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size 87 [2021-11-12 22:21:51,420 INFO L180 QuantifierPusher]: treesize reduction 27, result has 80.0 percent of original size [2021-11-12 22:21:51,429 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:51,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-11-12 22:21:51,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-12 22:21:51,461 INFO L180 QuantifierPusher]: treesize reduction 27, result has 81.0 percent of original size [2021-11-12 22:21:51,468 INFO L185 QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size 87 [2021-11-12 22:21:51,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,545 INFO L180 QuantifierPusher]: treesize reduction 32, result has 77.1 percent of original size [2021-11-12 22:21:51,550 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:51,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:21:51,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:21:51,574 INFO L180 QuantifierPusher]: treesize reduction 32, result has 78.2 percent of original size [2021-11-12 22:21:51,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-12 22:21:51,589 INFO L180 QuantifierPusher]: treesize reduction 32, result has 77.1 percent of original size [2021-11-12 22:21:51,598 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:51,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:21:51,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:21:51,619 INFO L180 QuantifierPusher]: treesize reduction 32, result has 78.2 percent of original size [2021-11-12 22:21:51,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-12 22:21:51,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,667 INFO L180 QuantifierPusher]: treesize reduction 27, result has 80.9 percent of original size [2021-11-12 22:21:51,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:21:51,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,737 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,745 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 264 [2021-11-12 22:21:51,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,820 INFO L180 QuantifierPusher]: treesize reduction 30, result has 55.9 percent of original size [2021-11-12 22:21:51,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-12 22:21:51,831 INFO L180 QuantifierPusher]: treesize reduction 31, result has 67.7 percent of original size [2021-11-12 22:21:51,842 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:51,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,847 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:51,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 22:21:51,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-12 22:21:51,851 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:51,852 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:21:51,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 22:21:51,862 INFO L180 QuantifierPusher]: treesize reduction 30, result has 55.9 percent of original size [2021-11-12 22:21:51,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-12 22:21:51,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,899 INFO L180 QuantifierPusher]: treesize reduction 32, result has 77.1 percent of original size [2021-11-12 22:21:51,903 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:51,904 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,911 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 22:21:51,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:21:51,919 INFO L180 QuantifierPusher]: treesize reduction 27, result has 80.0 percent of original size [2021-11-12 22:21:51,922 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:21:51,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-11-12 22:21:51,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-12 22:21:51,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:51,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:21:51,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:51,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:52,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:21:52,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-11-12 22:21:52,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:52,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:52,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:52,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:21:52,046 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2021-11-12 22:21:52,052 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 62 for LOIs [2021-11-12 22:21:52,056 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:21:54,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:21:54,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:54,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-12 22:21:54,256 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-12 22:21:54,256 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-12 22:21:54,262 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:21:54,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-12 22:21:54,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:21:54,470 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-12 22:21:54,472 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:21:54,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:21:54 BoogieIcfgContainer [2021-11-12 22:21:54,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:21:54,485 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:21:54,485 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:21:54,486 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:21:54,486 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:31" (3/4) ... [2021-11-12 22:21:54,493 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 22:21:54,493 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:21:54,494 INFO L158 Benchmark]: Toolchain (without parser) took 23574.35ms. Allocated memory is still 127.9MB. Free memory was 95.7MB in the beginning and 87.5MB in the end (delta: 8.1MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-12 22:21:54,494 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 83.9MB. Free memory was 40.2MB in the beginning and 40.2MB in the end (delta: 40.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:21:54,495 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.62ms. Allocated memory is still 127.9MB. Free memory was 95.4MB in the beginning and 104.1MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:21:54,495 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.33ms. Allocated memory is still 127.9MB. Free memory was 104.1MB in the beginning and 102.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:21:54,495 INFO L158 Benchmark]: Boogie Preprocessor took 22.01ms. Allocated memory is still 127.9MB. Free memory was 102.8MB in the beginning and 101.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:21:54,496 INFO L158 Benchmark]: RCFGBuilder took 312.84ms. Allocated memory is still 127.9MB. Free memory was 101.6MB in the beginning and 90.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:21:54,496 INFO L158 Benchmark]: TraceAbstraction took 22897.70ms. Allocated memory is still 127.9MB. Free memory was 90.2MB in the beginning and 87.5MB in the end (delta: 2.7MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-11-12 22:21:54,496 INFO L158 Benchmark]: Witness Printer took 7.98ms. Allocated memory is still 127.9MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:21:54,498 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 83.9MB. Free memory was 40.2MB in the beginning and 40.2MB in the end (delta: 40.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.62ms. Allocated memory is still 127.9MB. Free memory was 95.4MB in the beginning and 104.1MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.33ms. Allocated memory is still 127.9MB. Free memory was 104.1MB in the beginning and 102.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.01ms. Allocated memory is still 127.9MB. Free memory was 102.8MB in the beginning and 101.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 312.84ms. Allocated memory is still 127.9MB. Free memory was 101.6MB in the beginning and 90.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 22897.70ms. Allocated memory is still 127.9MB. Free memory was 90.2MB in the beginning and 87.5MB in the end (delta: 2.7MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Witness Printer took 7.98ms. Allocated memory is still 127.9MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L29] CALL assume_abort_if_not(A>=0 && A<=2) [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A>=0 && A<=2) [L30] B = __VERIFIER_nondet_uint() [L31] CALL assume_abort_if_not(B>=0 && B<=2) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B>=0 && B<=2) [L32] CALL assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L16] COND FALSE !(!cond) [L32] RET assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L33] CALL assume_abort_if_not(B >= 1) [L16] COND FALSE !(!cond) [L33] RET assume_abort_if_not(B >= 1) [L34] q = 0 [L35] r = A [L36] b = B [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND TRUE !(r >= b) [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22.8s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 17.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 10 SdHoareTripleChecker+Valid, 16935.03ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 110 SdHoareTripleChecker+Invalid, 16159.64ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 76 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45 IncrementalHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 42 mSDtfsCounter, 45 mSolverCounterSat, 7.87ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 378 SizeOfPredicates, 7 NumberOfNonLiveVariables, 158 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 44/50 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 22:21:54,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF --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 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:21:56,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:21:56,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:21:57,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:21:57,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:21:57,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:21:57,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:21:57,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:21:57,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:21:57,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:21:57,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:21:57,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:21:57,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:21:57,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:21:57,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:21:57,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:21:57,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:21:57,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:21:57,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:21:57,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:21:57,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:21:57,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:21:57,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:21:57,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:21:57,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:21:57,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:21:57,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:21:57,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:21:57,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:21:57,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:21:57,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:21:57,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:21:57,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:21:57,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:21:57,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:21:57,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:21:57,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:21:57,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:21:57,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:21:57,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:21:57,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:21:57,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:21:57,167 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:21:57,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:21:57,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:21:57,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:21:57,170 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:21:57,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:21:57,170 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:21:57,170 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:21:57,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:21:57,171 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:21:57,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:21:57,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:21:57,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:21:57,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:21:57,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:21:57,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:21:57,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:21:57,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:21:57,175 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:21:57,175 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:21:57,175 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:21:57,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:21:57,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:21:57,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:21:57,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:21:57,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:21:57,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:21:57,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:21:57,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:21:57,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:21:57,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:21:57,178 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:21:57,178 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:21:57,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:21:57,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:21:57,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:21:57,179 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 [2021-11-12 22:21:57,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:21:57,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:21:57,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:21:57,656 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:21:57,659 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:21:57,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2021-11-12 22:21:57,719 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data/11deec57f/f13c0ead00da4dcc90b8fe7589e21da8/FLAGb4ed0a1da [2021-11-12 22:21:58,168 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:21:58,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2021-11-12 22:21:58,181 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data/11deec57f/f13c0ead00da4dcc90b8fe7589e21da8/FLAGb4ed0a1da [2021-11-12 22:21:58,558 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/data/11deec57f/f13c0ead00da4dcc90b8fe7589e21da8 [2021-11-12 22:21:58,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:21:58,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:21:58,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:58,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:21:58,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:21:58,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bf2bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58, skipping insertion in model container [2021-11-12 22:21:58,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:21:58,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:21:58,739 WARN L228 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_c60d84f1-2744-4482-8ab3-12ceea485094/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2021-11-12 22:21:58,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:58,766 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:21:58,792 WARN L228 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_c60d84f1-2744-4482-8ab3-12ceea485094/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2021-11-12 22:21:58,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:58,849 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:21:58,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58 WrapperNode [2021-11-12 22:21:58,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:58,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:21:58,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:21:58,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:21:58,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:21:58,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:21:58,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:21:58,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:21:58,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:21:58,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:21:58,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:21:58,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:21:58,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (1/1) ... [2021-11-12 22:21:58,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:21:58,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:21:58,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:21:59,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:21:59,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:21:59,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:21:59,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:21:59,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:21:59,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:21:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:21:59,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:21:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:21:59,325 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:21:59,338 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:21:59,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:59 BoogieIcfgContainer [2021-11-12 22:21:59,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:21:59,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:21:59,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:21:59,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:21:59,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:21:58" (1/3) ... [2021-11-12 22:21:59,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3970dcba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:21:59, skipping insertion in model container [2021-11-12 22:21:59,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:58" (2/3) ... [2021-11-12 22:21:59,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3970dcba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:21:59, skipping insertion in model container [2021-11-12 22:21:59,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:59" (3/3) ... [2021-11-12 22:21:59,364 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.i [2021-11-12 22:21:59,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:21:59,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:21:59,450 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:21:59,457 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:21:59,457 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:21:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:21:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-12 22:21:59,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:59,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:59,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash 913242413, now seen corresponding path program 1 times [2021-11-12 22:21:59,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:59,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233010937] [2021-11-12 22:21:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:59,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:59,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:59,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:59,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:21:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:59,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:21:59,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:21:59,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:21:59,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:59,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233010937] [2021-11-12 22:21:59,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233010937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:59,881 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:59,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:21:59,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049386773] [2021-11-12 22:21:59,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:59,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:21:59,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:59,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:21:59,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:21:59,921 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:21:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:59,953 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2021-11-12 22:21:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:21:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-11-12 22:21:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:59,967 INFO L225 Difference]: With dead ends: 55 [2021-11-12 22:21:59,967 INFO L226 Difference]: Without dead ends: 25 [2021-11-12 22:21:59,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:21:59,976 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:59,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:21:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-12 22:22:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-12 22:22:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 22:22:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-12 22:22:00,040 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2021-11-12 22:22:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:00,041 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-12 22:22:00,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:22:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-12 22:22:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 22:22:00,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:00,045 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:00,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:00,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:00,256 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:00,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2061833476, now seen corresponding path program 1 times [2021-11-12 22:22:00,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:00,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28803786] [2021-11-12 22:22:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:00,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:00,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:00,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:00,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:22:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:00,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:22:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:22:00,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:01,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:01,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28803786] [2021-11-12 22:22:01,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28803786] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:01,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:01,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-12 22:22:01,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164634013] [2021-11-12 22:22:01,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:01,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:22:01,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:01,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:22:01,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:22:01,150 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:22:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:01,240 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-11-12 22:22:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:22:01,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-11-12 22:22:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:01,260 INFO L225 Difference]: With dead ends: 35 [2021-11-12 22:22:01,260 INFO L226 Difference]: Without dead ends: 33 [2021-11-12 22:22:01,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:22:01,262 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 43.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:01,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 17 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 9 Unchecked, 43.37ms Time] [2021-11-12 22:22:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-12 22:22:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-12 22:22:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:22:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-12 22:22:01,284 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2021-11-12 22:22:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:01,293 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-12 22:22:01,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:22:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-12 22:22:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-12 22:22:01,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:01,295 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:01,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:01,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:01,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:01,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:01,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1044269705, now seen corresponding path program 1 times [2021-11-12 22:22:01,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:01,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871130375] [2021-11-12 22:22:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:01,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:01,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:01,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:01,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:22:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:01,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:22:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:22:01,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:22:02,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:02,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871130375] [2021-11-12 22:22:02,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871130375] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:02,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:02,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-12 22:22:02,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302180063] [2021-11-12 22:22:02,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:02,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:22:02,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:22:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:22:02,411 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:22:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:02,516 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-12 22:22:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:22:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-11-12 22:22:02,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:02,522 INFO L225 Difference]: With dead ends: 41 [2021-11-12 22:22:02,522 INFO L226 Difference]: Without dead ends: 39 [2021-11-12 22:22:02,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:22:02,523 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 46.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:02,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 100 Invalid, 17 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 9 Unchecked, 46.38ms Time] [2021-11-12 22:22:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-12 22:22:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-11-12 22:22:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:22:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-12 22:22:02,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 33 [2021-11-12 22:22:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:02,539 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-12 22:22:02,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:22:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-12 22:22:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-12 22:22:02,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:02,545 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:02,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:02,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:02,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -328713508, now seen corresponding path program 1 times [2021-11-12 22:22:02,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:02,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252367066] [2021-11-12 22:22:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:02,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:02,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:02,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:02,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:22:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:02,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:22:02,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:03,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:03,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:03,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252367066] [2021-11-12 22:22:03,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252367066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:03,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1963970928] [2021-11-12 22:22:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:03,867 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:22:03,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:22:03,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:22:03,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 22:22:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:22:03,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:04,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:04,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1963970928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:04,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180377102] [2021-11-12 22:22:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:04,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:22:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:22:04,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:22:04,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 22:22:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:22:04,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:22:05,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:06,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180377102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:06,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:22:06,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 10, 6] total 13 [2021-11-12 22:22:06,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066862069] [2021-11-12 22:22:06,002 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:22:06,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:22:06,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:22:06,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:22:06,004 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:22:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:06,792 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-11-12 22:22:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:22:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) Word has length 37 [2021-11-12 22:22:06,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:06,795 INFO L225 Difference]: With dead ends: 45 [2021-11-12 22:22:06,795 INFO L226 Difference]: Without dead ends: 38 [2021-11-12 22:22:06,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:22:06,797 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 579.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.97ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 653.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:06,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 122 Invalid, 138 Unknown, 0 Unchecked, 3.97ms Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 653.48ms Time] [2021-11-12 22:22:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-12 22:22:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-11-12 22:22:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:22:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-12 22:22:06,805 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 37 [2021-11-12 22:22:06,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:06,806 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-12 22:22:06,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:22:06,806 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-12 22:22:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 22:22:06,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:06,808 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:06,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:07,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:07,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-12 22:22:07,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:22:07,415 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1786164585, now seen corresponding path program 1 times [2021-11-12 22:22:07,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:07,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673292405] [2021-11-12 22:22:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:07,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:07,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:07,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:07,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:22:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:07,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:22:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:07,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:07,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:07,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673292405] [2021-11-12 22:22:07,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673292405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:07,671 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:07,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:22:07,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539215724] [2021-11-12 22:22:07,672 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:07,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:22:07,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:07,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:22:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:22:07,674 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:22:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:07,703 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-11-12 22:22:07,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:22:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-11-12 22:22:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:07,709 INFO L225 Difference]: With dead ends: 45 [2021-11-12 22:22:07,709 INFO L226 Difference]: Without dead ends: 32 [2021-11-12 22:22:07,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:22:07,713 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:07,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 9 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 16.09ms Time] [2021-11-12 22:22:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-12 22:22:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-12 22:22:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 22:22:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-12 22:22:07,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 39 [2021-11-12 22:22:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:07,725 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-12 22:22:07,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:22:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-12 22:22:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 22:22:07,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:07,727 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:07,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:07,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:07,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:07,939 INFO L85 PathProgramCache]: Analyzing trace with hash 145189394, now seen corresponding path program 1 times [2021-11-12 22:22:07,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:07,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282388465] [2021-11-12 22:22:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:07,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:07,941 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:07,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:22:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:08,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:22:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:22:09,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:11,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:11,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282388465] [2021-11-12 22:22:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282388465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:11,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1825718781] [2021-11-12 22:22:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:11,447 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:22:11,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:22:11,466 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:22:11,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:22:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:11,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:22:11,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:14,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:15,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1825718781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:15,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130253365] [2021-11-12 22:22:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:15,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:22:15,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:22:15,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:22:15,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 22:22:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:15,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 22:22:15,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:16,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:22:18,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130253365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:18,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:22:18,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 7, 14, 9] total 28 [2021-11-12 22:22:18,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195867176] [2021-11-12 22:22:18,872 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:22:18,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-12 22:22:18,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-12 22:22:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=609, Unknown=1, NotChecked=0, Total=756 [2021-11-12 22:22:18,875 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-12 22:22:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:20,402 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-11-12 22:22:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:22:20,403 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 41 [2021-11-12 22:22:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:20,405 INFO L225 Difference]: With dead ends: 52 [2021-11-12 22:22:20,405 INFO L226 Difference]: Without dead ends: 50 [2021-11-12 22:22:20,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 211 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=194, Invalid=861, Unknown=1, NotChecked=0, Total=1056 [2021-11-12 22:22:20,407 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 950.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.16ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 1055.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:20,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 202 Invalid, 173 Unknown, 0 Unchecked, 3.16ms Time], IncrementalHoareTripleChecker [14 Valid, 128 Invalid, 0 Unknown, 31 Unchecked, 1055.85ms Time] [2021-11-12 22:22:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-12 22:22:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-11-12 22:22:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-12 22:22:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-12 22:22:20,417 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 41 [2021-11-12 22:22:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:20,418 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-12 22:22:20,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-12 22:22:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-12 22:22:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 22:22:20,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:20,420 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:20,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-12 22:22:20,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 22:22:20,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-12 22:22:21,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:22:21,022 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash 202447696, now seen corresponding path program 1 times [2021-11-12 22:22:21,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:21,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930420688] [2021-11-12 22:22:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:21,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:21,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:21,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:21,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:22:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:21,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:22:21,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:22:21,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:22:22,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:22,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930420688] [2021-11-12 22:22:22,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930420688] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:22,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:22,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-12 22:22:22,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24924951] [2021-11-12 22:22:22,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:22,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:22:22,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:22:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:22:22,201 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:22:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:22,294 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-11-12 22:22:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:22:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-11-12 22:22:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:22,295 INFO L225 Difference]: With dead ends: 50 [2021-11-12 22:22:22,295 INFO L226 Difference]: Without dead ends: 48 [2021-11-12 22:22:22,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:22:22,296 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 33.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:22,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 122 Invalid, 22 Unknown, 0 Unchecked, 0.95ms Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 15 Unchecked, 33.24ms Time] [2021-11-12 22:22:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-12 22:22:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-12 22:22:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 22:22:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-11-12 22:22:22,305 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 41 [2021-11-12 22:22:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:22,305 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-11-12 22:22:22,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:22:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-11-12 22:22:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 22:22:22,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:22,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:22,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:22,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:22,524 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2114474925, now seen corresponding path program 2 times [2021-11-12 22:22:22,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:22,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038157868] [2021-11-12 22:22:22,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:22:22,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:22,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:22,526 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:22,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:22:22,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:22:22,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:22:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:22:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:22:23,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:22:23,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:23,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038157868] [2021-11-12 22:22:23,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038157868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:23,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754668895] [2021-11-12 22:22:23,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:22:23,691 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:22:23,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:22:23,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:22:23,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:22:23,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:22:23,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:22:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:22:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:22:24,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:22:24,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754668895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:24,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125740760] [2021-11-12 22:22:24,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:22:24,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:22:24,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:22:24,486 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:22:24,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:22:24,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:22:24,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:22:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:22:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:22:24,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:22:25,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125740760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:22:25,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:22:25,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 7, 12, 10] total 23 [2021-11-12 22:22:25,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120814529] [2021-11-12 22:22:25,215 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:22:25,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 22:22:25,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:25,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 22:22:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:22:25,217 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 10 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-12 22:22:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:25,939 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2021-11-12 22:22:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:22:25,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 10 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) Word has length 49 [2021-11-12 22:22:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:25,945 INFO L225 Difference]: With dead ends: 97 [2021-11-12 22:22:25,945 INFO L226 Difference]: Without dead ends: 69 [2021-11-12 22:22:25,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 22:22:25,947 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 239.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 293.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:25,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 183 Invalid, 231 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [68 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 293.99ms Time] [2021-11-12 22:22:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-12 22:22:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-11-12 22:22:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 22:22:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-11-12 22:22:25,959 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 49 [2021-11-12 22:22:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:25,959 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-11-12 22:22:25,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 10 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-12 22:22:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-11-12 22:22:25,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 22:22:25,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:25,961 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:26,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:26,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:26,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-12 22:22:26,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:26,587 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:26,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1596822888, now seen corresponding path program 3 times [2021-11-12 22:22:26,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:26,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535745660] [2021-11-12 22:22:26,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:22:26,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:26,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:26,588 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:26,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:22:26,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:22:26,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:22:26,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:22:26,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 13 refuted. 2 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:22:34,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:23:07,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535745660] [2021-11-12 22:23:07,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535745660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:23:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317173376] [2021-11-12 22:23:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:23:07,264 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:23:07,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:23:07,287 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:23:07,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:23:07,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:23:07,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:23:07,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:23:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:23:21,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:23:58,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1317173376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:23:58,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127135335] [2021-11-12 22:23:58,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:23:58,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:23:58,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:23:58,970 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:23:58,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:23:59,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:23:59,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:23:59,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 22:23:59,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:24:02,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:17,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~q~0#1|] [2021-11-12 22:25:17,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:25:17,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12, 12] total 37 [2021-11-12 22:25:17,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847639984] [2021-11-12 22:25:17,209 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-12 22:25:17,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-12 22:25:17,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:17,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-12 22:25:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1753, Unknown=29, NotChecked=0, Total=2162 [2021-11-12 22:25:17,212 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 12 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) [2021-11-12 22:25:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:18,698 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-12 22:25:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:25:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 12 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) Word has length 51 [2021-11-12 22:25:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:18,700 INFO L225 Difference]: With dead ends: 70 [2021-11-12 22:25:18,700 INFO L226 Difference]: Without dead ends: 60 [2021-11-12 22:25:18,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 232 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 152.6s TimeCoverageRelationStatistics Valid=411, Invalid=2010, Unknown=29, NotChecked=0, Total=2450 [2021-11-12 22:25:18,702 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 211.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:18,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 258 Invalid, 109 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 43 Unchecked, 211.16ms Time] [2021-11-12 22:25:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-12 22:25:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-12 22:25:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 22:25:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-11-12 22:25:18,715 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 51 [2021-11-12 22:25:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:18,716 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-11-12 22:25:18,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 12 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) [2021-11-12 22:25:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-11-12 22:25:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 22:25:18,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:18,718 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:18,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-12 22:25:18,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:19,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 22:25:19,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:19,348 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1654081190, now seen corresponding path program 1 times [2021-11-12 22:25:19,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:19,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721334315] [2021-11-12 22:25:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:19,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:19,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:19,350 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:19,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:25:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:19,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 22:25:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:25:21,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:25:47,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:47,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721334315] [2021-11-12 22:25:47,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721334315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:47,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1256471574] [2021-11-12 22:25:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:47,722 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:47,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:47,723 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:47,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:25:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:47,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:25:47,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 17 refuted. 2 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:25:54,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:26:01,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1256471574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:01,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881709019] [2021-11-12 22:26:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:01,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:01,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:01,757 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:26:01,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 22:26:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:01,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 22:26:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:26:03,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:26:35,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881709019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:35,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:26:35,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14, 11, 16, 12] total 38 [2021-11-12 22:26:35,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93502166] [2021-11-12 22:26:35,205 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:26:35,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-12 22:26:35,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-12 22:26:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1130, Unknown=9, NotChecked=0, Total=1406 [2021-11-12 22:26:35,207 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 36 states have internal predecessors, (83), 15 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2021-11-12 22:26:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:57,695 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-11-12 22:26:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-12 22:26:57,696 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 36 states have internal predecessors, (83), 15 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) Word has length 51 [2021-11-12 22:26:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:57,698 INFO L225 Difference]: With dead ends: 88 [2021-11-12 22:26:57,698 INFO L226 Difference]: Without dead ends: 86 [2021-11-12 22:26:57,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 258 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=432, Invalid=1814, Unknown=10, NotChecked=0, Total=2256 [2021-11-12 22:26:57,700 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5740.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 6335.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:57,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 369 Invalid, 380 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 66 Unchecked, 6335.36ms Time] [2021-11-12 22:26:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-12 22:26:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2021-11-12 22:26:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 56 states have internal predecessors, (64), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-12 22:26:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-11-12 22:26:57,715 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 51 [2021-11-12 22:26:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:57,716 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-11-12 22:26:57,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 36 states have internal predecessors, (83), 15 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2021-11-12 22:26:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-11-12 22:26:57,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 22:26:57,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:57,718 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:57,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:57,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:58,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:58,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:58,334 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:58,334 INFO L85 PathProgramCache]: Analyzing trace with hash 585705638, now seen corresponding path program 2 times [2021-11-12 22:26:58,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:58,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913637420] [2021-11-12 22:26:58,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:26:58,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:58,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:58,337 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:58,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:26:58,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:26:58,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:26:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:26:58,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:26:59,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 22:26:59,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:59,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913637420] [2021-11-12 22:26:59,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913637420] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:59,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:26:59,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-12 22:26:59,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709400847] [2021-11-12 22:26:59,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:59,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:26:59,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:59,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:26:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:26:59,720 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:26:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:59,799 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-11-12 22:26:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:26:59,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2021-11-12 22:26:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:59,802 INFO L225 Difference]: With dead ends: 84 [2021-11-12 22:26:59,802 INFO L226 Difference]: Without dead ends: 62 [2021-11-12 22:26:59,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:26:59,803 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:59,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 14 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 71.78ms Time] [2021-11-12 22:26:59,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-12 22:26:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-12 22:26:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:26:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-12 22:26:59,815 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 51 [2021-11-12 22:26:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:59,816 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-12 22:26:59,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:26:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-12 22:26:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 22:26:59,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:59,818 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:59,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:00,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:00,030 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1287103, now seen corresponding path program 3 times [2021-11-12 22:27:00,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:00,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080422376] [2021-11-12 22:27:00,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:27:00,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:00,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:00,034 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:00,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:27:00,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 22:27:00,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:27:00,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:27:00,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 22:27:01,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 22:27:02,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:02,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080422376] [2021-11-12 22:27:02,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080422376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:02,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [192079106] [2021-11-12 22:27:02,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:27:02,770 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:02,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:27:02,772 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:27:02,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 22:27:02,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 22:27:02,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:27:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:27:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:27:03,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 22:27:05,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [192079106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:05,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327258588] [2021-11-12 22:27:05,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:27:05,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:27:05,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:27:05,366 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:27:05,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-12 22:27:05,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 22:27:05,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:27:05,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:27:05,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 22:27:06,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:27:09,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327258588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:09,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:27:09,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12, 12, 13, 13] total 37 [2021-11-12 22:27:09,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793573751] [2021-11-12 22:27:09,088 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:27:09,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-12 22:27:09,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:09,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-12 22:27:09,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 22:27:09,090 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 37 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 18 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (29), 20 states have call predecessors, (29), 17 states have call successors, (29) [2021-11-12 22:27:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:10,889 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2021-11-12 22:27:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:27:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 18 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (29), 20 states have call predecessors, (29), 17 states have call successors, (29) Word has length 59 [2021-11-12 22:27:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:10,895 INFO L225 Difference]: With dead ends: 87 [2021-11-12 22:27:10,895 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 22:27:10,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 309 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 22:27:10,898 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 732.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.95ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 806.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:10,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 319 Invalid, 322 Unknown, 0 Unchecked, 3.95ms Time], IncrementalHoareTripleChecker [68 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 806.83ms Time] [2021-11-12 22:27:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 22:27:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 22:27:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 22:27:10,900 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-11-12 22:27:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 22:27:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 18 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (29), 20 states have call predecessors, (29), 17 states have call successors, (29) [2021-11-12 22:27:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 22:27:10,901 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 22:27:10,904 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:27:10,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:11,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-12 22:27:11,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:11,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:11,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 22:27:20,456 WARN L227 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 151 DAG size of output: 67 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 22:27:20,470 INFO L858 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2021-11-12 22:27:20,470 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 22:27:20,470 INFO L854 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32)) [2021-11-12 22:27:20,471 INFO L854 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (bvule |ULTIMATE.start_main_~B~0#1| (_ bv2 32)) (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32))) [2021-11-12 22:27:20,471 INFO L861 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2021-11-12 22:27:20,471 INFO L858 garLoopResultBuilder]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-11-12 22:27:20,471 INFO L861 garLoopResultBuilder]: At program point L52(lines 25 53) the Hoare annotation is: true [2021-11-12 22:27:20,471 INFO L858 garLoopResultBuilder]: For program point L46(lines 46 49) no Hoare annotation was computed. [2021-11-12 22:27:20,472 INFO L858 garLoopResultBuilder]: For program point L46-2(lines 25 53) no Hoare annotation was computed. [2021-11-12 22:27:20,472 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (let ((.cse1 (forall ((|ULTIMATE.start_main_~b~0#1| (_ BitVec 32))) (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|))) (.cse0 (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse4 (bvuge |ULTIMATE.start_main_~B~0#1| (_ bv1 32))) (.cse6 (= |ULTIMATE.start_main_~r~0#1| (bvadd (bvneg |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~A~0#1|))) (.cse7 (= |ULTIMATE.start_main_~q~0#1| (_ bv1 32))) (.cse2 (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32)))) (or (and (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv2 32) |ULTIMATE.start_main_~B~0#1|)) (not (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse0 .cse1 .cse2) (and .cse3 .cse1 .cse2) (and (exists ((|v_ULTIMATE.start_main_~b~0#1_83| (_ BitVec 32))) (and (bvuge |ULTIMATE.start_main_~r~0#1| |v_ULTIMATE.start_main_~b~0#1_83|) (bvuge |v_ULTIMATE.start_main_~b~0#1_83| (_ bv1 32)) (bvuge |ULTIMATE.start_main_~r~0#1| (bvmul |v_ULTIMATE.start_main_~b~0#1_83| (_ bv2 32))) (= (bvmul (_ bv4 32) |v_ULTIMATE.start_main_~b~0#1_83|) |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32)) .cse0 .cse4 .cse2) (let ((.cse5 (bvmul |ULTIMATE.start_main_~B~0#1| (_ bv4 32)))) (and (bvult |ULTIMATE.start_main_~B~0#1| .cse5) (= |ULTIMATE.start_main_~b~0#1| (bvudiv .cse5 (_ bv2 32))) .cse6 .cse7 .cse2 (bvuge |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~b~0#1|))) (and .cse3 .cse4 (exists ((|v_ULTIMATE.start_main_~b~0#1_93| (_ BitVec 32))) (and (= |ULTIMATE.start_main_~b~0#1| (bvudiv (bvmul |v_ULTIMATE.start_main_~b~0#1_93| (_ bv2 32)) (_ bv2 32))) (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul (_ bv2 32) |v_ULTIMATE.start_main_~b~0#1_93|)) |ULTIMATE.start_main_~A~0#1|) (bvule |v_ULTIMATE.start_main_~b~0#1_93| (_ bv2 32)))) (bvule |ULTIMATE.start_main_~r~0#1| (_ bv2 32)) (= |ULTIMATE.start_main_~q~0#1| (_ bv2 32)) .cse2) (and (bvule |ULTIMATE.start_main_~B~0#1| (_ bv2 32)) (= |ULTIMATE.start_main_~b~0#1| (bvudiv (bvmul |ULTIMATE.start_main_~B~0#1| (_ bv2 32)) (_ bv2 32))) .cse4 .cse6 .cse7 .cse2))) [2021-11-12 22:27:20,472 INFO L858 garLoopResultBuilder]: For program point L42-1(lines 41 50) no Hoare annotation was computed. [2021-11-12 22:27:20,473 INFO L858 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2021-11-12 22:27:20,473 INFO L854 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (bvule |ULTIMATE.start_main_~B~0#1| (_ bv2 32)) (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32))) [2021-11-12 22:27:20,473 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-12 22:27:20,473 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 22:27:20,473 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-12 22:27:20,474 INFO L858 garLoopResultBuilder]: For program point L51(line 51) no Hoare annotation was computed. [2021-11-12 22:27:20,474 INFO L854 garLoopResultBuilder]: At program point L41-1(lines 41 50) the Hoare annotation is: (and (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|) (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32))) [2021-11-12 22:27:20,474 INFO L854 garLoopResultBuilder]: At program point L37-2(lines 37 40) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32))) (.cse2 (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse3 (bvuge |ULTIMATE.start_main_~B~0#1| (_ bv1 32))) (.cse4 (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32)))) (or (and (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv2 32) |ULTIMATE.start_main_~B~0#1|)) .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse1 (bvule |ULTIMATE.start_main_~b~0#1| (_ bv2 32)) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|) (bvuge |ULTIMATE.start_main_~b~0#1| (_ bv1 32)) .cse4) (and (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv4 32) |ULTIMATE.start_main_~B~0#1|)) .cse0 .cse1 (bvuge |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~B~0#1| (_ bv2 32))) .cse2 .cse3 .cse4))) [2021-11-12 22:27:20,474 INFO L858 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-12 22:27:20,474 INFO L858 garLoopResultBuilder]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2021-11-12 22:27:20,475 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 15 17) the Hoare annotation is: true [2021-11-12 22:27:20,475 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2021-11-12 22:27:20,475 INFO L858 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2021-11-12 22:27:20,475 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2021-11-12 22:27:20,475 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2021-11-12 22:27:20,476 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-11-12 22:27:20,476 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-11-12 22:27:20,476 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-11-12 22:27:20,479 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:20,481 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:27:20,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:27:20 BoogieIcfgContainer [2021-11-12 22:27:20,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:27:20,495 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:27:20,495 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:27:20,495 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:27:20,496 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:59" (3/4) ... [2021-11-12 22:27:20,499 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 22:27:20,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-12 22:27:20,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-12 22:27:20,510 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-11-12 22:27:20,511 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-12 22:27:20,511 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-12 22:27:20,511 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 22:27:20,546 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 22:27:20,546 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:27:20,547 INFO L158 Benchmark]: Toolchain (without parser) took 321984.38ms. Allocated memory was 62.9MB in the beginning and 100.7MB in the end (delta: 37.7MB). Free memory was 42.6MB in the beginning and 52.9MB in the end (delta: -10.3MB). Peak memory consumption was 27.6MB. Max. memory is 16.1GB. [2021-11-12 22:27:20,547 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:27:20,548 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.38ms. Allocated memory is still 62.9MB. Free memory was 42.4MB in the beginning and 45.4MB in the end (delta: -3.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:27:20,548 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.35ms. Allocated memory is still 62.9MB. Free memory was 45.2MB in the beginning and 43.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:27:20,548 INFO L158 Benchmark]: Boogie Preprocessor took 53.17ms. Allocated memory is still 62.9MB. Free memory was 43.9MB in the beginning and 42.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:27:20,549 INFO L158 Benchmark]: RCFGBuilder took 395.50ms. Allocated memory is still 62.9MB. Free memory was 42.7MB in the beginning and 32.7MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:27:20,549 INFO L158 Benchmark]: TraceAbstraction took 321151.76ms. Allocated memory was 62.9MB in the beginning and 100.7MB in the end (delta: 37.7MB). Free memory was 32.2MB in the beginning and 55.0MB in the end (delta: -22.8MB). Peak memory consumption was 48.4MB. Max. memory is 16.1GB. [2021-11-12 22:27:20,550 INFO L158 Benchmark]: Witness Printer took 51.54ms. Allocated memory is still 100.7MB. Free memory was 55.0MB in the beginning and 52.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:27:20,552 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 284.38ms. Allocated memory is still 62.9MB. Free memory was 42.4MB in the beginning and 45.4MB in the end (delta: -3.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.35ms. Allocated memory is still 62.9MB. Free memory was 45.2MB in the beginning and 43.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.17ms. Allocated memory is still 62.9MB. Free memory was 43.9MB in the beginning and 42.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 395.50ms. Allocated memory is still 62.9MB. Free memory was 42.7MB in the beginning and 32.7MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 321151.76ms. Allocated memory was 62.9MB in the beginning and 100.7MB in the end (delta: 37.7MB). Free memory was 32.2MB in the beginning and 55.0MB in the end (delta: -22.8MB). Peak memory consumption was 48.4MB. Max. memory is 16.1GB. * Witness Printer took 51.54ms. Allocated memory is still 100.7MB. Free memory was 55.0MB in the beginning and 52.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 321.0s, OverallIterations: 12, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 29.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 9.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 304 SdHoareTripleChecker+Valid, 9567.53ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 296 mSDsluCounter, 1913 SdHoareTripleChecker+Invalid, 8602.75ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 173 IncrementalHoareTripleChecker+Unchecked, 1611 mSDsCounter, 185 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1074 IncrementalHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 185 mSolverCounterUnsat, 302 mSDtfsCounter, 1074 mSolverCounterSat, 31.96ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2165 GetRequests, 1879 SyntacticMatches, 29 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3056 ImplicationChecksByTransitivity, 229.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=10, InterpolantAutomatonStates: 135, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 49 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 38 PreInvPairs, 54 NumberOfFragments, 262 HoareAnnotationTreeSize, 38 FomulaSimplifications, 73 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 1624 FormulaSimplificationTreeSizeReductionInter, 8.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 196.9s InterpolantComputationTime, 1038 NumberOfCodeBlocks, 1026 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2030 ConstructedInterpolants, 148 QuantifiedInterpolants, 11689 SizeOfPredicates, 108 NumberOfNonLiveVariables, 1874 ConjunctsInSsa, 334 ConjunctsInUnsatCore, 46 InterpolantComputations, 8 PerfectInterpolantSequences, 1371/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((b == ~bvmul32(2bv32, B) && r == A) && q == 0bv32) && ~bvuge32(r, B)) && ~bvuge32(B, 1bv32)) && ~bvule32(A, 2bv32)) || (((((r == A && q == 0bv32) && ~bvule32(b, 2bv32)) && b == B) && ~bvuge32(b, 1bv32)) && ~bvule32(A, 2bv32))) || ((((((b == ~bvmul32(4bv32, B) && r == A) && q == 0bv32) && ~bvuge32(r, ~bvmul32(B, 2bv32))) && ~bvuge32(r, B)) && ~bvuge32(B, 1bv32)) && ~bvule32(A, 2bv32)) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-12 22:27:20,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60d84f1-2744-4482-8ab3-12ceea485094/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE