./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI --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 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:52:06,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:52:06,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:52:06,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:52:06,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:52:06,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:52:06,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:52:06,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:52:06,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:52:06,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:52:06,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:52:06,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:52:06,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:52:06,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:52:06,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:52:06,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:52:06,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:52:06,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:52:06,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:52:06,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:52:06,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:52:06,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:52:06,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:52:06,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:52:06,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:52:06,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:52:06,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:52:06,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:52:06,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:52:06,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:52:06,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:52:06,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:52:06,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:52:06,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:52:06,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:52:06,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:52:06,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:52:06,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:52:06,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:52:06,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:52:06,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:52:06,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:52:06,301 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:52:06,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:52:06,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:52:06,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:52:06,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:52:06,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:52:06,304 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:52:06,304 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:52:06,304 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:52:06,304 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:52:06,306 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:52:06,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:52:06,306 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:52:06,314 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:52:06,315 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:52:06,315 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:52:06,315 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:52:06,316 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:52:06,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:52:06,317 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:52:06,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:52:06,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:52:06,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:52:06,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:52:06,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:52:06,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:52:06,319 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:52:06,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:52:06,319 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:52:06,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:52:06,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:52:06,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:52:06,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:52:06,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:52:06,321 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:52:06,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:52:06,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:52:06,322 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:52:06,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:52:06,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:52:06,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:52:06,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 [2022-11-03 02:52:06,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:52:06,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:52:06,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:52:06,690 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:52:06,690 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:52:06,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2022-11-03 02:52:06,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data/7f88c20fe/2f93164dcdd642c99468045628da354e/FLAG8ebf035b5 [2022-11-03 02:52:07,393 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:52:07,393 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2022-11-03 02:52:07,411 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data/7f88c20fe/2f93164dcdd642c99468045628da354e/FLAG8ebf035b5 [2022-11-03 02:52:07,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data/7f88c20fe/2f93164dcdd642c99468045628da354e [2022-11-03 02:52:07,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:52:07,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:52:07,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:52:07,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:52:07,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:52:07,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:52:07" (1/1) ... [2022-11-03 02:52:07,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a40b93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:07, skipping insertion in model container [2022-11-03 02:52:07,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:52:07" (1/1) ... [2022-11-03 02:52:07,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:52:07,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:52:08,212 WARN L230 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_63b810b5-2a77-4901-8725-2a385d912ff9/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2022-11-03 02:52:08,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:52:08,416 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:52:08,474 WARN L230 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_63b810b5-2a77-4901-8725-2a385d912ff9/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2022-11-03 02:52:08,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:52:08,639 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:52:08,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08 WrapperNode [2022-11-03 02:52:08,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:52:08,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:52:08,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:52:08,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:52:08,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:08,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:08,814 INFO L138 Inliner]: procedures = 177, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1308 [2022-11-03 02:52:08,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:52:08,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:52:08,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:52:08,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:52:08,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:08,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:08,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:08,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:08,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:09,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:09,020 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:09,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:09,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:52:09,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:52:09,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:52:09,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:52:09,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (1/1) ... [2022-11-03 02:52:09,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:52:09,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:09,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:52:09,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:52:09,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:52:09,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:52:09,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:52:09,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:52:09,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:52:09,157 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:52:09,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:52:09,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:52:09,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:52:09,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:52:09,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:52:09,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:52:09,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:52:09,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:52:09,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:52:09,473 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:52:09,485 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:52:11,716 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:52:12,297 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:52:12,297 INFO L300 CfgBuilder]: Removed 69 assume(true) statements. [2022-11-03 02:52:12,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:52:12 BoogieIcfgContainer [2022-11-03 02:52:12,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:52:12,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:52:12,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:52:12,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:52:12,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:52:07" (1/3) ... [2022-11-03 02:52:12,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c364f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:52:12, skipping insertion in model container [2022-11-03 02:52:12,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:08" (2/3) ... [2022-11-03 02:52:12,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c364f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:52:12, skipping insertion in model container [2022-11-03 02:52:12,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:52:12" (3/3) ... [2022-11-03 02:52:12,316 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test4-2.i [2022-11-03 02:52:12,338 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:52:12,338 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:52:12,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:52:12,440 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@587baf93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:52:12,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:52:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 121 states have (on average 1.7933884297520661) internal successors, (217), 132 states have internal predecessors, (217), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:52:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:52:12,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:12,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:12,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1510987453, now seen corresponding path program 1 times [2022-11-03 02:52:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:12,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340136864] [2022-11-03 02:52:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:12,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:12,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340136864] [2022-11-03 02:52:12,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340136864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:12,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:12,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:52:12,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445207664] [2022-11-03 02:52:12,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:12,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:12,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:12,801 INFO L87 Difference]: Start difference. First operand has 141 states, 121 states have (on average 1.7933884297520661) internal successors, (217), 132 states have internal predecessors, (217), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:15,258 INFO L93 Difference]: Finished difference Result 375 states and 678 transitions. [2022-11-03 02:52:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:15,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:52:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:15,276 INFO L225 Difference]: With dead ends: 375 [2022-11-03 02:52:15,276 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 02:52:15,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:15,284 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 97 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:15,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 327 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:52:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 02:52:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 127. [2022-11-03 02:52:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 108 states have (on average 1.212962962962963) internal successors, (131), 118 states have internal predecessors, (131), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:52:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-11-03 02:52:15,345 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 8 [2022-11-03 02:52:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:15,346 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-11-03 02:52:15,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-11-03 02:52:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:52:15,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:15,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:15,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:52:15,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:15,352 INFO L85 PathProgramCache]: Analyzing trace with hash -660444059, now seen corresponding path program 1 times [2022-11-03 02:52:15,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:15,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622667855] [2022-11-03 02:52:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:15,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:15,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:52:15,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549915180] [2022-11-03 02:52:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:15,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:15,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:15,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:52:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:17,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:52:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:17,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:17,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622667855] [2022-11-03 02:52:17,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:52:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549915180] [2022-11-03 02:52:17,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549915180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:17,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893558304] [2022-11-03 02:52:17,497 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-03 02:52:17,498 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:52:17,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:52:17,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:52:17,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:52:17,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:17,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:52:17,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:17,699 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:52:17,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 02:52:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:17,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:52:17,793 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:52:17,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:52:17,816 INFO L390 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 17 treesize of output 22 [2022-11-03 02:52:17,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:17,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 7 [2022-11-03 02:52:18,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:18,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:52:18,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:52:18,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:18,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:52:18,440 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:52:18,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 02:52:18,490 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:52:18,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:52:18,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 7 [2022-11-03 02:52:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 7 [2022-11-03 02:52:18,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:52:18,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2022-11-03 02:52:18,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:18,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:18,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:52:18,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:52:18,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:52:18,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:52:20,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [893558304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:20,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:52:20,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2022-11-03 02:52:20,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080690168] [2022-11-03 02:52:20,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:20,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:52:20,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:52:20,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:52:20,025 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:24,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:52:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:24,971 INFO L93 Difference]: Finished difference Result 271 states and 347 transitions. [2022-11-03 02:52:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:52:24,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:52:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:24,974 INFO L225 Difference]: With dead ends: 271 [2022-11-03 02:52:24,974 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:52:24,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:52:24,977 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 18 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:24,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 363 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 02:52:24,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:52:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2022-11-03 02:52:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 118 states have (on average 1.194915254237288) internal successors, (141), 128 states have internal predecessors, (141), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:52:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-11-03 02:52:25,001 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 52 [2022-11-03 02:52:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:25,001 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-11-03 02:52:25,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:52:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-11-03 02:52:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:52:25,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:25,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:25,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:25,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:25,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2080398640, now seen corresponding path program 1 times [2022-11-03 02:52:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:25,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105616834] [2022-11-03 02:52:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:25,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:25,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:52:25,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755180713] [2022-11-03 02:52:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:25,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:25,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:25,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:52:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:26,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:52:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:52:26,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:52:26,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:26,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105616834] [2022-11-03 02:52:26,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:52:26,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755180713] [2022-11-03 02:52:26,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755180713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:26,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748515527] [2022-11-03 02:52:26,882 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 02:52:26,883 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:52:26,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:52:26,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:52:26,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:52:27,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:27,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:52:27,127 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 02:52:27,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-03 02:52:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:27,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:52:27,196 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:52:27,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:52:27,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:27,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:52:27,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2022-11-03 02:52:27,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:27,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:52:27,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:52:27,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:27,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:52:27,532 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:27,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:52:27,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:52:27,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:52:27,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:52:27,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:52:27,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:52:27,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:52:27,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:52:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:27,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:52:27,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:27,874 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:52:27,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 02:52:27,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:27,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 02:52:27,951 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:52:27,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:52:27,967 INFO L390 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 17 treesize of output 22 [2022-11-03 02:52:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:27,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 7 [2022-11-03 02:52:28,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:28,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:28,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:52:28,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:52:28,365 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:28,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 02:52:28,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:52:28,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:52:28,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:52:28,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:52:28,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:52:28,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:52:28,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:52:28,676 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 78 for LOIs [2022-11-03 02:52:28,731 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:52:30,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [748515527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:30,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:52:30,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4] total 17 [2022-11-03 02:52:30,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487665451] [2022-11-03 02:52:30,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:30,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:52:30,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:30,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:52:30,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:52:30,361 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:52:36,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:52:40,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:52:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:40,289 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2022-11-03 02:52:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:52:40,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-11-03 02:52:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:40,292 INFO L225 Difference]: With dead ends: 273 [2022-11-03 02:52:40,292 INFO L226 Difference]: Without dead ends: 148 [2022-11-03 02:52:40,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:52:40,294 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 15 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:40,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 636 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 278 Invalid, 1 Unknown, 87 Unchecked, 8.1s Time] [2022-11-03 02:52:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-03 02:52:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2022-11-03 02:52:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 132 states have internal predecessors, (145), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:52:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-11-03 02:52:40,316 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 65 [2022-11-03 02:52:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:40,317 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-11-03 02:52:40,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:52:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-11-03 02:52:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:52:40,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:40,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:40,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:40,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:40,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2054535782, now seen corresponding path program 1 times [2022-11-03 02:52:40,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292157258] [2022-11-03 02:52:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:40,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:40,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:52:40,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661768065] [2022-11-03 02:52:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:40,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:40,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:40,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:40,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:52:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:52:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:52:42,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:52:42,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:42,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292157258] [2022-11-03 02:52:42,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:52:42,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661768065] [2022-11-03 02:52:42,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661768065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:42,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271246365] [2022-11-03 02:52:42,268 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 02:52:42,268 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:52:42,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:52:42,270 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:52:42,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:52:42,397 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:52:42,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 02:52:42,409 INFO L390 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 17 treesize of output 22 [2022-11-03 02:52:42,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:42,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 7 [2022-11-03 02:52:42,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:42,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:52:42,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2022-11-03 02:52:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:42,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 7 [2022-11-03 02:52:42,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:52:42,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 02:52:42,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:42,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-03 02:52:42,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:52:42,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-03 02:52:42,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-11-03 02:52:42,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:52:42,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 02:52:42,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 02:52:42,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-03 02:52:42,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-11-03 02:52:42,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:52:42,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:52:42,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:52:43,045 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:52:43,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2022-11-03 02:52:43,087 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 02:52:43,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-03 02:52:43,123 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:52:43,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-11-03 02:52:43,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:52:43,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:52:43,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:52:43,232 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:43,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:52:43,248 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:43,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 02:52:43,266 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:43,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 02:52:43,348 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:43,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 02:52:43,370 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:43,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-03 02:52:43,388 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:43,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:52:54,900 WARN L234 SmtUtils]: Spent 11.42s on a formula simplification. DAG size of input: 67 DAG size of output: 32 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 02:52:54,901 INFO L356 Elim1Store]: treesize reduction 340, result has 16.0 percent of original size [2022-11-03 02:52:54,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:55,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:55,112 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: |v_#memory_$Pointer$.base_594| input size 140 context size 140 output size 140 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:52:55,116 INFO L158 Benchmark]: Toolchain (without parser) took 47481.12ms. Allocated memory was 113.2MB in the beginning and 373.3MB in the end (delta: 260.0MB). Free memory was 66.1MB in the beginning and 140.0MB in the end (delta: -73.9MB). Peak memory consumption was 185.8MB. Max. memory is 16.1GB. [2022-11-03 02:52:55,116 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:52:55,116 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1003.52ms. Allocated memory is still 113.2MB. Free memory was 65.8MB in the beginning and 60.1MB in the end (delta: 5.8MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2022-11-03 02:52:55,117 INFO L158 Benchmark]: Boogie Procedure Inliner took 174.54ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 60.1MB in the beginning and 105.4MB in the end (delta: -45.3MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2022-11-03 02:52:55,117 INFO L158 Benchmark]: Boogie Preprocessor took 236.54ms. Allocated memory is still 136.3MB. Free memory was 105.4MB in the beginning and 96.9MB in the end (delta: 8.5MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2022-11-03 02:52:55,117 INFO L158 Benchmark]: RCFGBuilder took 3247.90ms. Allocated memory was 136.3MB in the beginning and 180.4MB in the end (delta: 44.0MB). Free memory was 96.9MB in the beginning and 72.7MB in the end (delta: 24.2MB). Peak memory consumption was 81.2MB. Max. memory is 16.1GB. [2022-11-03 02:52:55,118 INFO L158 Benchmark]: TraceAbstraction took 42812.16ms. Allocated memory was 180.4MB in the beginning and 373.3MB in the end (delta: 192.9MB). Free memory was 71.7MB in the beginning and 140.0MB in the end (delta: -68.3MB). Peak memory consumption was 123.6MB. Max. memory is 16.1GB. [2022-11-03 02:52:55,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1003.52ms. Allocated memory is still 113.2MB. Free memory was 65.8MB in the beginning and 60.1MB in the end (delta: 5.8MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 174.54ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 60.1MB in the beginning and 105.4MB in the end (delta: -45.3MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 236.54ms. Allocated memory is still 136.3MB. Free memory was 105.4MB in the beginning and 96.9MB in the end (delta: 8.5MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * RCFGBuilder took 3247.90ms. Allocated memory was 136.3MB in the beginning and 180.4MB in the end (delta: 44.0MB). Free memory was 96.9MB in the beginning and 72.7MB in the end (delta: 24.2MB). Peak memory consumption was 81.2MB. Max. memory is 16.1GB. * TraceAbstraction took 42812.16ms. Allocated memory was 180.4MB in the beginning and 373.3MB in the end (delta: 192.9MB). Free memory was 71.7MB in the beginning and 140.0MB in the end (delta: -68.3MB). Peak memory consumption was 123.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_594| input size 140 context size 140 output size 140 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_594| input size 140 context size 140 output size 140: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:364) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:52:55,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI --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 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:52:57,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:52:57,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:52:57,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:52:57,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:52:57,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:52:57,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:52:57,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:52:57,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:52:57,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:52:57,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:52:57,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:52:57,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:52:57,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:52:57,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:52:57,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:52:57,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:52:57,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:52:57,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:52:57,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:52:57,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:52:57,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:52:57,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:52:57,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:52:57,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:52:57,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:52:57,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:52:57,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:52:57,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:52:57,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:52:57,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:52:57,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:52:57,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:52:57,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:52:57,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:52:57,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:52:57,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:52:57,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:52:57,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:52:57,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:52:57,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:52:57,758 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:52:57,796 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:52:57,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:52:57,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:52:57,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:52:57,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:52:57,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:52:57,799 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:52:57,799 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:52:57,799 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:52:57,800 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:52:57,800 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:52:57,800 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:52:57,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:52:57,801 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:52:57,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:52:57,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:52:57,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:52:57,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:52:57,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:52:57,803 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:52:57,803 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:52:57,804 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:52:57,804 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:52:57,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:52:57,804 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:52:57,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:52:57,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:52:57,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:52:57,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:52:57,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:52:57,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:52:57,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:52:57,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:52:57,807 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:52:57,807 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:57,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:52:57,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:52:57,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:52:57,809 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_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 [2022-11-03 02:52:58,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:52:58,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:52:58,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:52:58,290 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:52:58,291 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:52:58,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2022-11-03 02:52:58,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data/80139a999/63afabb9618940b5850b69291db95403/FLAGde083c725 [2022-11-03 02:52:59,143 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:52:59,145 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2022-11-03 02:52:59,173 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data/80139a999/63afabb9618940b5850b69291db95403/FLAGde083c725 [2022-11-03 02:52:59,354 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/data/80139a999/63afabb9618940b5850b69291db95403 [2022-11-03 02:52:59,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:52:59,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:52:59,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:52:59,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:52:59,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:52:59,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:52:59" (1/1) ... [2022-11-03 02:52:59,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc55c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:59, skipping insertion in model container [2022-11-03 02:52:59,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:52:59" (1/1) ... [2022-11-03 02:52:59,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:52:59,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:52:59,840 WARN L230 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_63b810b5-2a77-4901-8725-2a385d912ff9/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2022-11-03 02:53:00,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:00,072 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:53:00,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:53:00,138 WARN L230 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_63b810b5-2a77-4901-8725-2a385d912ff9/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2022-11-03 02:53:00,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:00,215 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:53:00,242 WARN L230 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_63b810b5-2a77-4901-8725-2a385d912ff9/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2022-11-03 02:53:00,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:53:00,368 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:53:00,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00 WrapperNode [2022-11-03 02:53:00,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:53:00,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:00,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:53:00,371 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:53:00,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,558 INFO L138 Inliner]: procedures = 180, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1309 [2022-11-03 02:53:00,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:53:00,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:53:00,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:53:00,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:53:00,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,682 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:53:00,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:53:00,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:53:00,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:53:00,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (1/1) ... [2022-11-03 02:53:00,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:53:00,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:00,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:53:00,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:53:00,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:53:00,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:53:00,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:53:00,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:53:00,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:53:00,807 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:53:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:53:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:53:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:53:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:53:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:53:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:53:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:53:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:53:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:53:00,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:53:01,258 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:53:01,261 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:53:12,250 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:53:12,260 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:53:12,260 INFO L300 CfgBuilder]: Removed 69 assume(true) statements. [2022-11-03 02:53:12,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:12 BoogieIcfgContainer [2022-11-03 02:53:12,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:53:12,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:53:12,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:53:12,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:53:12,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:52:59" (1/3) ... [2022-11-03 02:53:12,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2829a2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:12, skipping insertion in model container [2022-11-03 02:53:12,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:53:00" (2/3) ... [2022-11-03 02:53:12,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2829a2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:53:12, skipping insertion in model container [2022-11-03 02:53:12,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:53:12" (3/3) ... [2022-11-03 02:53:12,273 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test4-2.i [2022-11-03 02:53:12,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:53:12,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:53:12,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:53:12,362 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71516db9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:53:12,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:53:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 231 states have internal predecessors, (370), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:53:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:53:12,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:12,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:12,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:12,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1526554564, now seen corresponding path program 1 times [2022-11-03 02:53:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75759319] [2022-11-03 02:53:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:12,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:12,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:12,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:12,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:53:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:53:12,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:12,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:12,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:12,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75759319] [2022-11-03 02:53:12,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75759319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:12,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:12,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:53:12,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897512238] [2022-11-03 02:53:12,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:12,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:12,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:12,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:12,787 INFO L87 Difference]: Start difference. First operand has 240 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 231 states have internal predecessors, (370), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:13,202 INFO L93 Difference]: Finished difference Result 648 states and 1103 transitions. [2022-11-03 02:53:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:53:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:13,230 INFO L225 Difference]: With dead ends: 648 [2022-11-03 02:53:13,230 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 02:53:13,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:13,239 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 211 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:13,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 680 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:53:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 02:53:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 208. [2022-11-03 02:53:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 199 states have internal predecessors, (250), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:53:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-11-03 02:53:13,371 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 10 [2022-11-03 02:53:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:13,371 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-11-03 02:53:13,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-11-03 02:53:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:53:13,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:13,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:13,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:13,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:13,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:13,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1951190789, now seen corresponding path program 1 times [2022-11-03 02:53:13,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:13,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750550830] [2022-11-03 02:53:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:13,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:13,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:13,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:13,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:53:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 2037 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:53:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:16,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:16,033 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:16,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750550830] [2022-11-03 02:53:16,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750550830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:16,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:16,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430629715] [2022-11-03 02:53:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:16,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:16,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:16,038 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:16,235 INFO L93 Difference]: Finished difference Result 422 states and 573 transitions. [2022-11-03 02:53:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:53:16,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 02:53:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:16,239 INFO L225 Difference]: With dead ends: 422 [2022-11-03 02:53:16,244 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 02:53:16,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:16,249 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 225 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:16,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 536 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 02:53:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2022-11-03 02:53:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 192 states have (on average 1.2760416666666667) internal successors, (245), 202 states have internal predecessors, (245), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:53:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2022-11-03 02:53:16,280 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 108 [2022-11-03 02:53:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:16,281 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2022-11-03 02:53:16,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2022-11-03 02:53:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:53:16,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:16,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:16,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-03 02:53:16,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:16,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2116649223, now seen corresponding path program 1 times [2022-11-03 02:53:16,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:16,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763607479] [2022-11-03 02:53:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:16,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:16,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:16,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:53:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:53:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:19,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:19,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:19,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763607479] [2022-11-03 02:53:19,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763607479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:19,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:19,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:53:19,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643231051] [2022-11-03 02:53:19,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:19,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:19,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:19,211 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:19,490 INFO L93 Difference]: Finished difference Result 460 states and 597 transitions. [2022-11-03 02:53:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:19,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-03 02:53:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:19,503 INFO L225 Difference]: With dead ends: 460 [2022-11-03 02:53:19,503 INFO L226 Difference]: Without dead ends: 252 [2022-11-03 02:53:19,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:19,505 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:19,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:53:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-03 02:53:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-11-03 02:53:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 233 states have (on average 1.2446351931330473) internal successors, (290), 243 states have internal predecessors, (290), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:53:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 322 transitions. [2022-11-03 02:53:19,528 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 322 transitions. Word has length 108 [2022-11-03 02:53:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:19,529 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 322 transitions. [2022-11-03 02:53:19,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 322 transitions. [2022-11-03 02:53:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:53:19,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:19,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:19,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:19,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:19,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1820106650, now seen corresponding path program 1 times [2022-11-03 02:53:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:19,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736400266] [2022-11-03 02:53:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:19,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:19,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:19,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:19,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:53:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:21,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:53:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:21,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:21,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736400266] [2022-11-03 02:53:21,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736400266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:21,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:21,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:53:21,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689055507] [2022-11-03 02:53:21,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:21,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:53:21,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:53:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:53:21,707 INFO L87 Difference]: Start difference. First operand 252 states and 322 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:53:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:21,803 INFO L93 Difference]: Finished difference Result 463 states and 605 transitions. [2022-11-03 02:53:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:53:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 123 [2022-11-03 02:53:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:21,807 INFO L225 Difference]: With dead ends: 463 [2022-11-03 02:53:21,807 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 02:53:21,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:21,810 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:21,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 02:53:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-11-03 02:53:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 235 states have (on average 1.2468085106382978) internal successors, (293), 246 states have internal predecessors, (293), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-03 02:53:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 327 transitions. [2022-11-03 02:53:21,830 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 327 transitions. Word has length 123 [2022-11-03 02:53:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:21,831 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 327 transitions. [2022-11-03 02:53:21,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:53:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 327 transitions. [2022-11-03 02:53:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:53:21,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:21,834 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:21,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:22,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:22,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash 20377084, now seen corresponding path program 1 times [2022-11-03 02:53:22,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:22,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610536481] [2022-11-03 02:53:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:22,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:22,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:22,064 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:22,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:53:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:24,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:53:24,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:53:24,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:53:24,361 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:24,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610536481] [2022-11-03 02:53:24,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610536481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:24,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [611730288] [2022-11-03 02:53:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:24,362 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:24,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:24,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:53:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:26,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:53:26,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:53:26,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:26,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [611730288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:26,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:53:26,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 02:53:26,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879254847] [2022-11-03 02:53:26,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:26,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:26,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:26,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:26,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:26,677 INFO L87 Difference]: Start difference. First operand 255 states and 327 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:53:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:26,913 INFO L93 Difference]: Finished difference Result 524 states and 685 transitions. [2022-11-03 02:53:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:53:26,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-11-03 02:53:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:26,917 INFO L225 Difference]: With dead ends: 524 [2022-11-03 02:53:26,917 INFO L226 Difference]: Without dead ends: 313 [2022-11-03 02:53:26,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:26,919 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 206 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:26,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1116 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:53:26,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-03 02:53:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 264. [2022-11-03 02:53:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 244 states have (on average 1.2172131147540983) internal successors, (297), 255 states have internal predecessors, (297), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-03 02:53:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 331 transitions. [2022-11-03 02:53:26,939 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 331 transitions. Word has length 125 [2022-11-03 02:53:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:26,940 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 331 transitions. [2022-11-03 02:53:26,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:53:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 331 transitions. [2022-11-03 02:53:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:53:26,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:26,943 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:26,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:27,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:27,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:27,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:27,369 INFO L85 PathProgramCache]: Analyzing trace with hash 92763642, now seen corresponding path program 1 times [2022-11-03 02:53:27,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:27,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528973197] [2022-11-03 02:53:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:27,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:27,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:27,371 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:27,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:53:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:53:29,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:53:29,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:53:29,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:29,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528973197] [2022-11-03 02:53:29,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528973197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:29,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1722151629] [2022-11-03 02:53:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:29,609 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:29,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:29,613 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:29,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 02:53:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:32,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:53:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:53:32,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:32,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1722151629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:32,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:53:32,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:53:32,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606748862] [2022-11-03 02:53:32,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:32,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:32,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:32,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:32,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:53:32,783 INFO L87 Difference]: Start difference. First operand 264 states and 331 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:53:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:33,159 INFO L93 Difference]: Finished difference Result 574 states and 727 transitions. [2022-11-03 02:53:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-11-03 02:53:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:33,173 INFO L225 Difference]: With dead ends: 574 [2022-11-03 02:53:33,173 INFO L226 Difference]: Without dead ends: 354 [2022-11-03 02:53:33,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:53:33,175 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 52 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:33,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 509 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:53:33,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-03 02:53:33,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-03 02:53:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 331 states have (on average 1.2145015105740182) internal successors, (402), 342 states have internal predecessors, (402), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (22), 10 states have call predecessors, (22), 19 states have call successors, (22) [2022-11-03 02:53:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 443 transitions. [2022-11-03 02:53:33,212 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 443 transitions. Word has length 125 [2022-11-03 02:53:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:33,214 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 443 transitions. [2022-11-03 02:53:33,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:53:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 443 transitions. [2022-11-03 02:53:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:53:33,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:33,220 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:33,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:33,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:33,638 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 796653531, now seen corresponding path program 1 times [2022-11-03 02:53:33,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:33,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770543209] [2022-11-03 02:53:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:33,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:33,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:33,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:53:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:53:35,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:53:35,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:53:35,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:35,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770543209] [2022-11-03 02:53:35,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770543209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:35,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1738852118] [2022-11-03 02:53:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:35,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:35,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:35,461 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:35,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:53:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:37,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:53:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:53:37,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:37,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1738852118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:37,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:53:37,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 02:53:37,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135181961] [2022-11-03 02:53:37,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:37,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:37,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:37,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:37,874 INFO L87 Difference]: Start difference. First operand 354 states and 443 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:53:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:38,026 INFO L93 Difference]: Finished difference Result 577 states and 729 transitions. [2022-11-03 02:53:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:53:38,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 142 [2022-11-03 02:53:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:38,029 INFO L225 Difference]: With dead ends: 577 [2022-11-03 02:53:38,030 INFO L226 Difference]: Without dead ends: 330 [2022-11-03 02:53:38,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:53:38,032 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 215 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:38,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 797 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:53:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-03 02:53:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2022-11-03 02:53:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 307 states have (on average 1.1856677524429968) internal successors, (364), 318 states have internal predecessors, (364), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (22), 10 states have call predecessors, (22), 19 states have call successors, (22) [2022-11-03 02:53:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 405 transitions. [2022-11-03 02:53:38,070 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 405 transitions. Word has length 142 [2022-11-03 02:53:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:38,071 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 405 transitions. [2022-11-03 02:53:38,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:53:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 405 transitions. [2022-11-03 02:53:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:53:38,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:38,076 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:38,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:38,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:38,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:38,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:38,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1365793231, now seen corresponding path program 1 times [2022-11-03 02:53:38,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:38,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046537424] [2022-11-03 02:53:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:38,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:38,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:38,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:38,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:53:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:40,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:53:40,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:53:40,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:53:40,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:40,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046537424] [2022-11-03 02:53:40,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046537424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:40,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [619161519] [2022-11-03 02:53:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:40,534 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:40,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:40,535 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:40,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:53:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:43,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:53:43,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:53:43,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:53:43,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [619161519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770416467] [2022-11-03 02:53:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:43,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:43,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:43,722 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:43,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:53:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:45,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:53:45,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:53:45,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:53:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770416467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:46,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:46,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 12 [2022-11-03 02:53:46,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610565756] [2022-11-03 02:53:46,263 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:46,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:53:46,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:46,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:53:46,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:53:46,266 INFO L87 Difference]: Start difference. First operand 330 states and 405 transitions. Second operand has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:53:48,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:48,302 INFO L93 Difference]: Finished difference Result 1011 states and 1282 transitions. [2022-11-03 02:53:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:53:48,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 142 [2022-11-03 02:53:48,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:48,308 INFO L225 Difference]: With dead ends: 1011 [2022-11-03 02:53:48,308 INFO L226 Difference]: Without dead ends: 728 [2022-11-03 02:53:48,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:53:48,311 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 824 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:48,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 2606 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:53:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-03 02:53:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2022-11-03 02:53:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 687 states have (on average 1.1892285298398835) internal successors, (817), 698 states have internal predecessors, (817), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (42), 25 states have call predecessors, (42), 34 states have call successors, (42) [2022-11-03 02:53:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 893 transitions. [2022-11-03 02:53:48,383 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 893 transitions. Word has length 142 [2022-11-03 02:53:48,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:48,384 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 893 transitions. [2022-11-03 02:53:48,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.416666666666668) internal successors, (353), 12 states have internal predecessors, (353), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:53:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 893 transitions. [2022-11-03 02:53:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-11-03 02:53:48,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:48,397 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:48,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:48,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:48,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-11-03 02:53:49,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:49,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:49,021 INFO L85 PathProgramCache]: Analyzing trace with hash -974779672, now seen corresponding path program 1 times [2022-11-03 02:53:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:49,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633083082] [2022-11-03 02:53:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:49,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:49,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:49,026 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:49,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:53:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:59,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:53:59,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 02:53:59,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 02:53:59,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:59,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633083082] [2022-11-03 02:53:59,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633083082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:59,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2054422068] [2022-11-03 02:53:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:59,955 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:59,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:59,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:59,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 02:54:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:11,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:54:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 173 proven. 10 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-03 02:54:11,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 109 proven. 71 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-03 02:54:12,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2054422068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:12,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106777624] [2022-11-03 02:54:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:12,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:12,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:12,096 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:12,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:54:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:22,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:54:22,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 202 proven. 3 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-11-03 02:54:22,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-03 02:54:22,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106777624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:22,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:54:22,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2022-11-03 02:54:22,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875135552] [2022-11-03 02:54:22,630 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:54:22,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:54:22,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:54:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:54:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:54:22,633 INFO L87 Difference]: Start difference. First operand 726 states and 893 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:54:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:24,640 INFO L93 Difference]: Finished difference Result 1431 states and 1853 transitions. [2022-11-03 02:54:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:54:24,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 444 [2022-11-03 02:54:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:24,646 INFO L225 Difference]: With dead ends: 1431 [2022-11-03 02:54:24,646 INFO L226 Difference]: Without dead ends: 746 [2022-11-03 02:54:24,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2683 GetRequests, 2640 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:54:24,653 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 134 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2686 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:24,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 2686 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:54:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-03 02:54:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 738. [2022-11-03 02:54:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 699 states have (on average 1.1917024320457796) internal successors, (833), 710 states have internal predecessors, (833), 34 states have call successors, (34), 3 states have call predecessors, (34), 4 states have return successors, (42), 25 states have call predecessors, (42), 34 states have call successors, (42) [2022-11-03 02:54:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 909 transitions. [2022-11-03 02:54:24,776 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 909 transitions. Word has length 444 [2022-11-03 02:54:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:24,776 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 909 transitions. [2022-11-03 02:54:24,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:54:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 909 transitions. [2022-11-03 02:54:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-11-03 02:54:24,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:24,788 INFO L195 NwaCegarLoop]: trace histogram [36, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:24,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-03 02:54:25,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-11-03 02:54:25,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-03 02:54:25,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:25,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:25,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:25,405 INFO L85 PathProgramCache]: Analyzing trace with hash -638121752, now seen corresponding path program 2 times [2022-11-03 02:54:25,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:54:25,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110292437] [2022-11-03 02:54:25,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:54:25,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:54:25,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:54:25,410 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:54:25,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:54:36,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:54:36,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:37,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:54:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 02:54:37,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 02:54:38,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:54:38,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110292437] [2022-11-03 02:54:38,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110292437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:38,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1271841940] [2022-11-03 02:54:38,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:54:38,244 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:54:38,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:54:38,252 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:54:38,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:54:51,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:54:51,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:54:52,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:54:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:54:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 437 proven. 55 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-03 02:54:52,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:54:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 109 proven. 380 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2022-11-03 02:54:52,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1271841940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:54:52,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619485189] [2022-11-03 02:54:52,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:54:52,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:54:52,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:54:52,703 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:54:52,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:55:03,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:55:03,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:55:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 02:55:05,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:55:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2022-11-03 02:55:07,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619485189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:07,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:55:07,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 7, 7] total 36 [2022-11-03 02:55:07,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652970603] [2022-11-03 02:55:07,253 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:07,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:55:07,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:55:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:55:07,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:55:07,257 INFO L87 Difference]: Start difference. First operand 738 states and 909 transitions. Second operand has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:55:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:29,740 INFO L93 Difference]: Finished difference Result 2486 states and 3329 transitions. [2022-11-03 02:55:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 02:55:29,742 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 468 [2022-11-03 02:55:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:29,751 INFO L225 Difference]: With dead ends: 2486 [2022-11-03 02:55:29,752 INFO L226 Difference]: Without dead ends: 1791 [2022-11-03 02:55:29,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2841 GetRequests, 2772 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1091, Invalid=3879, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:55:29,757 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 3049 mSDsluCounter, 16231 mSDsCounter, 0 mSdLazyCounter, 4661 mSolverCounterSat, 1012 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3201 SdHoareTripleChecker+Valid, 17255 SdHoareTripleChecker+Invalid, 5673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1012 IncrementalHoareTripleChecker+Valid, 4661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:29,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3201 Valid, 17255 Invalid, 5673 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1012 Valid, 4661 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2022-11-03 02:55:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-11-03 02:55:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1773. [2022-11-03 02:55:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1698 states have (on average 1.17962308598351) internal successors, (2003), 1709 states have internal predecessors, (2003), 70 states have call successors, (70), 3 states have call predecessors, (70), 4 states have return successors, (90), 61 states have call predecessors, (90), 70 states have call successors, (90) [2022-11-03 02:55:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2163 transitions. [2022-11-03 02:55:29,888 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2163 transitions. Word has length 468 [2022-11-03 02:55:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:29,889 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2163 transitions. [2022-11-03 02:55:29,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 27.77777777777778) internal successors, (1000), 36 states have internal predecessors, (1000), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:55:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2163 transitions. [2022-11-03 02:55:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1087 [2022-11-03 02:55:29,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:29,945 INFO L195 NwaCegarLoop]: trace histogram [66, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:30,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:30,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:30,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:30,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:55:30,563 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:30,563 INFO L85 PathProgramCache]: Analyzing trace with hash -372986352, now seen corresponding path program 3 times [2022-11-03 02:55:30,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:55:30,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643219206] [2022-11-03 02:55:30,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:55:30,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:55:30,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:55:30,569 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:55:30,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b810b5-2a77-4901-8725-2a385d912ff9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process