./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/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 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c --- 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 01:38:59,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:38:59,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:38:59,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:38:59,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:38:59,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:38:59,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:38:59,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:38:59,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:38:59,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:38:59,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:38:59,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:38:59,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:38:59,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:38:59,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:38:59,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:38:59,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:38:59,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:38:59,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:38:59,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:38:59,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:38:59,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:38:59,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:38:59,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:38:59,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:38:59,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:38:59,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:38:59,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:38:59,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:38:59,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:38:59,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:38:59,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:38:59,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:38:59,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:38:59,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:38:59,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:38:59,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:38:59,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:38:59,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:38:59,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:38:59,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:38:59,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:38:59,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:38:59,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:38:59,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:38:59,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:38:59,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:38:59,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:38:59,889 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:38:59,889 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:38:59,889 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:38:59,890 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:38:59,891 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:38:59,891 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:38:59,891 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:38:59,891 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:38:59,892 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:38:59,892 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:38:59,892 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:38:59,892 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:38:59,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:38:59,893 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:38:59,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:38:59,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:38:59,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:38:59,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:38:59,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:38:59,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:38:59,896 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:38:59,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:38:59,897 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:38:59,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:38:59,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:38:59,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:38:59,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:38:59,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:38:59,899 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:38:59,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:38:59,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:38:59,899 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:38:59,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:38:59,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:38:59,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:38:59,900 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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c [2022-11-03 01:39:00,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:39:00,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:39:00,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:39:00,263 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:39:00,264 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:39:00,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2022-11-03 01:39:00,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data/81c2a8ba7/4f016c298eab4aad9f98e9b9bab2be1b/FLAG737777446 [2022-11-03 01:39:01,035 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:39:01,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2022-11-03 01:39:01,061 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data/81c2a8ba7/4f016c298eab4aad9f98e9b9bab2be1b/FLAG737777446 [2022-11-03 01:39:01,217 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data/81c2a8ba7/4f016c298eab4aad9f98e9b9bab2be1b [2022-11-03 01:39:01,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:39:01,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:39:01,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:01,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:39:01,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:39:01,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:01" (1/1) ... [2022-11-03 01:39:01,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9bb5074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:01, skipping insertion in model container [2022-11-03 01:39:01,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:01" (1/1) ... [2022-11-03 01:39:01,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:39:01,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:39:01,832 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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2022-11-03 01:39:02,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:02,009 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:39:02,037 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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2022-11-03 01:39:02,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:02,171 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:39:02,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02 WrapperNode [2022-11-03 01:39:02,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:02,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:02,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:39:02,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:39:02,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,294 INFO L138 Inliner]: procedures = 177, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1308 [2022-11-03 01:39:02,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:02,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:39:02,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:39:02,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:39:02,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,412 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:39:02,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:39:02,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:39:02,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:39:02,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (1/1) ... [2022-11-03 01:39:02,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:02,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:02,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:39:02,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:39:02,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:39:02,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:39:02,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:39:02,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:39:02,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 01:39:02,529 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 01:39:02,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:39:02,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:39:02,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:39:02,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:39:02,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:39:02,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:39:02,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:39:02,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:39:02,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:39:02,832 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:39:02,848 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:39:04,956 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:39:05,427 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:39:05,427 INFO L300 CfgBuilder]: Removed 69 assume(true) statements. [2022-11-03 01:39:05,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:05 BoogieIcfgContainer [2022-11-03 01:39:05,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:39:05,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:39:05,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:39:05,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:39:05,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:39:01" (1/3) ... [2022-11-03 01:39:05,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e87e105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:05, skipping insertion in model container [2022-11-03 01:39:05,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:02" (2/3) ... [2022-11-03 01:39:05,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e87e105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:05, skipping insertion in model container [2022-11-03 01:39:05,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:05" (3/3) ... [2022-11-03 01:39:05,440 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-2.i [2022-11-03 01:39:05,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:39:05,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:39:05,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:39:05,558 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;@13a9a6ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:39:05,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:39:05,565 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 01:39:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:39:05,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:05,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:05,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:05,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1510987453, now seen corresponding path program 1 times [2022-11-03 01:39:05,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:05,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790690690] [2022-11-03 01:39:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:05,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:05,876 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 01:39:05,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:05,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790690690] [2022-11-03 01:39:05,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790690690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:05,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:05,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:39:05,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87556513] [2022-11-03 01:39:05,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:05,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:39:05,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:05,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:39:05,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:39:05,928 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 01:39:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:08,110 INFO L93 Difference]: Finished difference Result 375 states and 678 transitions. [2022-11-03 01:39:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:39:08,119 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 01:39:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:08,129 INFO L225 Difference]: With dead ends: 375 [2022-11-03 01:39:08,129 INFO L226 Difference]: Without dead ends: 220 [2022-11-03 01:39:08,132 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 01:39:08,136 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 97 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:08,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 327 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 01:39:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-03 01:39:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 127. [2022-11-03 01:39:08,184 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 01:39:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-11-03 01:39:08,188 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 8 [2022-11-03 01:39:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:08,188 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-11-03 01:39:08,188 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 01:39:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-11-03 01:39:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 01:39:08,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:08,191 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 01:39:08,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:39:08,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash -660444059, now seen corresponding path program 1 times [2022-11-03 01:39:08,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:08,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705463472] [2022-11-03 01:39:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:08,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:08,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:39:08,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686844070] [2022-11-03 01:39:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:08,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:08,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:08,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:08,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:39:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:09,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:39:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:10,030 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 01:39:10,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:10,157 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 01:39:10,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705463472] [2022-11-03 01:39:10,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:39:10,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686844070] [2022-11-03 01:39:10,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686844070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:10,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737774415] [2022-11-03 01:39:10,186 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-03 01:39:10,187 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:39:10,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:39:10,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:39:10,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:39:10,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:10,412 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 01:39:10,413 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 01:39:10,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:10,438 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 01:39:10,482 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:39:10,483 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 01:39:10,503 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 01:39:10,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:10,525 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 01:39:10,899 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 01:39:10,911 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 01:39:10,919 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 01:39:10,937 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 01:39:10,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:39:11,007 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 01:39:11,008 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 01:39:11,054 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:39:11,054 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 01:39:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:11,075 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 01:39:11,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:11,089 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 01:39:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:11,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:11,100 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 01:39:11,463 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 01:39:11,483 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 01:39:11,498 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 01:39:11,507 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 01:39:11,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:39:11,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:39:12,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [737774415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:12,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:39:12,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2022-11-03 01:39:12,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799577717] [2022-11-03 01:39:12,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:12,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:39:12,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:39:12,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:39:12,419 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 01:39:16,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 01:39:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:16,886 INFO L93 Difference]: Finished difference Result 271 states and 347 transitions. [2022-11-03 01:39:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:39:16,887 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 01:39:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:16,888 INFO L225 Difference]: With dead ends: 271 [2022-11-03 01:39:16,888 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 01:39:16,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:39:16,890 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 18 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s 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, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:16,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 363 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-03 01:39:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 01:39:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2022-11-03 01:39:16,908 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 01:39:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2022-11-03 01:39:16,910 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 52 [2022-11-03 01:39:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:16,910 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2022-11-03 01:39:16,910 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 01:39:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2022-11-03 01:39:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 01:39:16,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:16,913 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 01:39:16,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 01:39:17,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:17,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:17,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2080398640, now seen corresponding path program 1 times [2022-11-03 01:39:17,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998468893] [2022-11-03 01:39:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:17,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:17,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:39:17,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333084671] [2022-11-03 01:39:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:17,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:17,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:17,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:17,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:39:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:18,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:39:18,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:18,634 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 01:39:18,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:18,738 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 01:39:18,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:18,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998468893] [2022-11-03 01:39:18,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:39:18,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333084671] [2022-11-03 01:39:18,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333084671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:18,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825105702] [2022-11-03 01:39:18,743 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 01:39:18,744 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:39:18,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:39:18,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:39:18,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:39:18,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:18,995 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 01:39:19,028 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-03 01:39:19,028 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 01:39:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,043 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 01:39:19,082 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:39:19,083 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 01:39:19,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,103 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 01:39:19,317 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 01:39:19,339 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 01:39:19,346 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 01:39:19,364 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 01:39:19,387 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 01:39:19,398 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:39:19,398 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 01:39:19,409 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 01:39:19,423 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 01:39:19,492 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 01:39:19,511 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 01:39:19,534 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 01:39:19,551 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 01:39:19,562 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 01:39:19,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:19,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,686 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 01:39:19,690 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 01:39:19,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,713 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 01:39:19,752 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:39:19,753 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 01:39:19,769 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 01:39:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:19,793 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 01:39:20,081 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 01:39:20,098 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 01:39:20,132 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 01:39:20,141 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 01:39:20,173 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:39:20,173 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 01:39:20,184 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 01:39:20,196 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 01:39:20,229 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 01:39:20,240 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 01:39:20,248 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 01:39:20,266 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 01:39:20,283 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 01:39:20,413 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 78 for LOIs [2022-11-03 01:39:20,452 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:39:21,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1825105702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:21,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:39:21,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4] total 17 [2022-11-03 01:39:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003859047] [2022-11-03 01:39:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:21,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:39:21,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:39:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:39:21,835 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 01:39:28,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 01:39:31,159 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 01:39:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:31,190 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2022-11-03 01:39:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:39:31,191 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 01:39:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:31,192 INFO L225 Difference]: With dead ends: 273 [2022-11-03 01:39:31,192 INFO L226 Difference]: Without dead ends: 148 [2022-11-03 01:39:31,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:39:31,194 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 15 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s 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, 7.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:31,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 636 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 278 Invalid, 1 Unknown, 87 Unchecked, 7.6s Time] [2022-11-03 01:39:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-03 01:39:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2022-11-03 01:39:31,222 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 01:39:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-11-03 01:39:31,223 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 65 [2022-11-03 01:39:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:31,224 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-11-03 01:39:31,224 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 01:39:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-11-03 01:39:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 01:39:31,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:31,227 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 01:39:31,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:31,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:31,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2054535782, now seen corresponding path program 1 times [2022-11-03 01:39:31,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:31,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837556769] [2022-11-03 01:39:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:31,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:31,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:39:31,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927263335] [2022-11-03 01:39:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:31,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:31,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:31,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:31,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:39:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:32,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:39:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:32,969 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 01:39:32,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:39:33,072 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 01:39:33,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:33,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837556769] [2022-11-03 01:39:33,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:39:33,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927263335] [2022-11-03 01:39:33,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927263335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:39:33,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015990572] [2022-11-03 01:39:33,076 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-03 01:39:33,077 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:39:33,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:39:33,078 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:39:33,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:39:33,187 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:39:33,187 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 01:39:33,198 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 01:39:33,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:33,212 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 01:39:33,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:33,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:39:33,264 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 01:39:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:33,282 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 01:39:33,511 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 01:39:33,517 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 01:39:33,529 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 01:39:33,541 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 01:39:33,560 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 01:39:33,570 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 01:39:33,584 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 01:39:33,609 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 01:39:33,629 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 01:39:33,638 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 01:39:33,647 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 01:39:33,660 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 01:39:33,703 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 01:39:33,707 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 01:39:33,712 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 01:39:33,751 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 01:39:33,752 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 01:39:33,784 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 01:39:33,785 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 01:39:33,814 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 01:39:33,814 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 01:39:33,847 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 01:39:33,853 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 01:39:33,858 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 01:39:33,898 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:39:33,899 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 01:39:33,912 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:39:33,913 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 01:39:33,928 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:39:33,929 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 01:39:33,994 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:39:33,994 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 01:39:34,043 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:39:34,044 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 01:39:34,059 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:39:34,059 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 01:39:45,694 WARN L234 SmtUtils]: Spent 11.54s 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 01:39:45,695 INFO L356 Elim1Store]: treesize reduction 340, result has 16.0 percent of original size [2022-11-03 01:39:45,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:39:45,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:45,896 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 01:39:45,905 INFO L158 Benchmark]: Toolchain (without parser) took 44682.11ms. Allocated memory was 107.0MB in the beginning and 339.7MB in the end (delta: 232.8MB). Free memory was 74.9MB in the beginning and 222.9MB in the end (delta: -148.0MB). Peak memory consumption was 84.1MB. Max. memory is 16.1GB. [2022-11-03 01:39:45,906 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 107.0MB. Free memory is still 63.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:39:45,907 INFO L158 Benchmark]: CACSL2BoogieTranslator took 945.03ms. Allocated memory is still 107.0MB. Free memory was 74.9MB in the beginning and 57.1MB in the end (delta: 17.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-03 01:39:45,908 INFO L158 Benchmark]: Boogie Procedure Inliner took 125.00ms. Allocated memory is still 107.0MB. Free memory was 57.1MB in the beginning and 47.4MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:39:45,908 INFO L158 Benchmark]: Boogie Preprocessor took 130.65ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 47.4MB in the beginning and 95.6MB in the end (delta: -48.2MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2022-11-03 01:39:45,909 INFO L158 Benchmark]: RCFGBuilder took 3000.43ms. Allocated memory was 130.0MB in the beginning and 161.5MB in the end (delta: 31.5MB). Free memory was 95.6MB in the beginning and 46.0MB in the end (delta: 49.5MB). Peak memory consumption was 83.0MB. Max. memory is 16.1GB. [2022-11-03 01:39:45,910 INFO L158 Benchmark]: TraceAbstraction took 40472.54ms. Allocated memory was 161.5MB in the beginning and 339.7MB in the end (delta: 178.3MB). Free memory was 45.0MB in the beginning and 222.9MB in the end (delta: -177.9MB). Peak memory consumption was 557.4kB. Max. memory is 16.1GB. [2022-11-03 01:39:45,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 107.0MB. Free memory is still 63.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 945.03ms. Allocated memory is still 107.0MB. Free memory was 74.9MB in the beginning and 57.1MB in the end (delta: 17.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 125.00ms. Allocated memory is still 107.0MB. Free memory was 57.1MB in the beginning and 47.4MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 130.65ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 47.4MB in the beginning and 95.6MB in the end (delta: -48.2MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * RCFGBuilder took 3000.43ms. Allocated memory was 130.0MB in the beginning and 161.5MB in the end (delta: 31.5MB). Free memory was 95.6MB in the beginning and 46.0MB in the end (delta: 49.5MB). Peak memory consumption was 83.0MB. Max. memory is 16.1GB. * TraceAbstraction took 40472.54ms. Allocated memory was 161.5MB in the beginning and 339.7MB in the end (delta: 178.3MB). Free memory was 45.0MB in the beginning and 222.9MB in the end (delta: -177.9MB). Peak memory consumption was 557.4kB. 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 01:39:45,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/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 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c --- 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 01:39:48,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:39:48,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:39:48,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:39:48,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:39:48,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:39:48,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:39:48,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:39:48,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:39:48,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:39:48,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:39:48,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:39:48,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:39:48,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:39:48,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:39:48,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:39:48,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:39:48,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:39:48,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:39:48,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:39:48,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:39:48,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:39:48,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:39:48,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:39:48,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:39:48,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:39:48,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:39:48,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:39:48,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:39:48,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:39:48,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:39:48,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:39:48,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:39:48,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:39:48,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:39:48,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:39:48,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:39:48,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:39:48,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:39:48,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:39:48,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:39:48,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 01:39:48,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:39:48,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:39:48,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:39:48,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:39:48,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:39:48,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:39:48,414 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:39:48,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:39:48,414 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:39:48,415 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:39:48,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:39:48,415 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:39:48,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:39:48,416 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:39:48,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:39:48,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:39:48,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:39:48,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:39:48,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:39:48,418 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:39:48,418 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:39:48,418 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:39:48,418 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:39:48,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:39:48,419 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:39:48,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:39:48,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:39:48,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:39:48,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:39:48,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:48,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:39:48,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:39:48,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:39:48,421 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:39:48,421 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:39:48,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:39:48,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:39:48,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:39:48,422 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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c [2022-11-03 01:39:48,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:39:48,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:39:48,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:39:48,876 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:39:48,877 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:39:48,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2022-11-03 01:39:48,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data/eb54642ba/a70f171cb1fa47d78799396b15ab68ee/FLAGdfa2db989 [2022-11-03 01:39:49,606 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:39:49,607 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2022-11-03 01:39:49,624 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data/eb54642ba/a70f171cb1fa47d78799396b15ab68ee/FLAGdfa2db989 [2022-11-03 01:39:49,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/data/eb54642ba/a70f171cb1fa47d78799396b15ab68ee [2022-11-03 01:39:49,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:39:49,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:39:49,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:49,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:39:49,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:39:49,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:49" (1/1) ... [2022-11-03 01:39:49,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a5e29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:49, skipping insertion in model container [2022-11-03 01:39:49,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:49" (1/1) ... [2022-11-03 01:39:49,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:39:49,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:39:50,414 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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2022-11-03 01:39:50,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:50,607 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 01:39:50,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:39:50,650 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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2022-11-03 01:39:50,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:50,798 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:39:50,827 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_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2022-11-03 01:39:50,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:50,928 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:39:50,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50 WrapperNode [2022-11-03 01:39:50,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:50,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:50,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:39:50,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:39:50,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:50,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,077 INFO L138 Inliner]: procedures = 180, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1309 [2022-11-03 01:39:51,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:51,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:39:51,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:39:51,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:39:51,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:39:51,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:39:51,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:39:51,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:39:51,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (1/1) ... [2022-11-03 01:39:51,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:51,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:51,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:39:51,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:39:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 01:39:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 01:39:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:39:51,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:39:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 01:39:51,342 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 01:39:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:39:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:39:51,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:39:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:39:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:39:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:39:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 01:39:51,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:39:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:39:51,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:39:51,618 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:39:51,620 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:40:02,227 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:40:02,235 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:40:02,235 INFO L300 CfgBuilder]: Removed 69 assume(true) statements. [2022-11-03 01:40:02,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:02 BoogieIcfgContainer [2022-11-03 01:40:02,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:40:02,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:40:02,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:40:02,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:40:02,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:39:49" (1/3) ... [2022-11-03 01:40:02,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a17e4eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:02, skipping insertion in model container [2022-11-03 01:40:02,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:50" (2/3) ... [2022-11-03 01:40:02,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a17e4eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:02, skipping insertion in model container [2022-11-03 01:40:02,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:02" (3/3) ... [2022-11-03 01:40:02,247 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-2.i [2022-11-03 01:40:02,266 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:40:02,266 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:40:02,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:40:02,328 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;@7151f4fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:40:02,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:40:02,334 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 01:40:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:40:02,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:02,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:40:02,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:02,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1526554564, now seen corresponding path program 1 times [2022-11-03 01:40:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540505776] [2022-11-03 01:40:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:02,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:02,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:02,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:02,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:40:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:40:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:02,655 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 01:40:02,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:02,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:02,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540505776] [2022-11-03 01:40:02,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540505776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:02,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:02,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970914219] [2022-11-03 01:40:02,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:02,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:02,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:02,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:02,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:02,710 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 01:40:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:02,963 INFO L93 Difference]: Finished difference Result 648 states and 1103 transitions. [2022-11-03 01:40:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:02,977 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 01:40:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:02,989 INFO L225 Difference]: With dead ends: 648 [2022-11-03 01:40:02,989 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 01:40:02,993 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 01:40:02,997 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 211 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:02,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 680 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:40:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 01:40:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 208. [2022-11-03 01:40:03,064 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 01:40:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-11-03 01:40:03,079 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 10 [2022-11-03 01:40:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:03,080 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-11-03 01:40:03,081 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 01:40:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-11-03 01:40:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 01:40:03,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:03,090 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 01:40:03,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 01:40:03,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:03,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1951190789, now seen corresponding path program 1 times [2022-11-03 01:40:03,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:03,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190867663] [2022-11-03 01:40:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:03,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:03,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:03,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:03,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:40:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:05,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2037 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:40:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:05,520 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 01:40:05,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:05,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190867663] [2022-11-03 01:40:05,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190867663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:05,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:05,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:40:05,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052878483] [2022-11-03 01:40:05,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:05,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:05,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:05,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:05,546 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 01:40:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:05,708 INFO L93 Difference]: Finished difference Result 422 states and 573 transitions. [2022-11-03 01:40:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:40:05,709 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 01:40:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:05,711 INFO L225 Difference]: With dead ends: 422 [2022-11-03 01:40:05,711 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 01:40:05,713 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 01:40:05,714 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 01:40:05,715 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 01:40:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 01:40:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2022-11-03 01:40:05,731 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 01:40:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2022-11-03 01:40:05,733 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 108 [2022-11-03 01:40:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:05,734 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2022-11-03 01:40:05,734 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 01:40:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2022-11-03 01:40:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 01:40:05,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:05,738 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 01:40:05,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:05,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:05,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:05,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:05,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2116649223, now seen corresponding path program 1 times [2022-11-03 01:40:05,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:05,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98807049] [2022-11-03 01:40:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:05,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:05,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:05,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:05,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:40:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:08,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:40:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:08,348 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 01:40:08,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:08,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:08,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98807049] [2022-11-03 01:40:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98807049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:08,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:40:08,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451306191] [2022-11-03 01:40:08,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:08,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:40:08,353 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 01:40:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:08,739 INFO L93 Difference]: Finished difference Result 460 states and 597 transitions. [2022-11-03 01:40:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:08,748 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 01:40:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:08,750 INFO L225 Difference]: With dead ends: 460 [2022-11-03 01:40:08,750 INFO L226 Difference]: Without dead ends: 252 [2022-11-03 01:40:08,751 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 01:40:08,752 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:08,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:40:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-03 01:40:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-11-03 01:40:08,771 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 01:40:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 322 transitions. [2022-11-03 01:40:08,773 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 322 transitions. Word has length 108 [2022-11-03 01:40:08,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:08,774 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 322 transitions. [2022-11-03 01:40:08,774 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 01:40:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 322 transitions. [2022-11-03 01:40:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 01:40:08,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:08,776 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 01:40:08,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:08,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:08,991 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:08,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:08,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1820106650, now seen corresponding path program 1 times [2022-11-03 01:40:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:08,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042832529] [2022-11-03 01:40:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:08,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:08,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:08,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:09,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:40:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:10,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:40:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:10,847 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 01:40:10,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:10,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:10,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042832529] [2022-11-03 01:40:10,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042832529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:10,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:40:10,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:40:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236200661] [2022-11-03 01:40:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:10,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:40:10,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:40:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:40:10,860 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 01:40:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:10,951 INFO L93 Difference]: Finished difference Result 463 states and 605 transitions. [2022-11-03 01:40:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:40:10,952 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 01:40:10,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:10,954 INFO L225 Difference]: With dead ends: 463 [2022-11-03 01:40:10,954 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 01:40:10,955 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 01:40:10,956 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 01:40:10,956 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 01:40:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 01:40:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-11-03 01:40:10,972 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 01:40:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 327 transitions. [2022-11-03 01:40:10,974 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 327 transitions. Word has length 123 [2022-11-03 01:40:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:10,975 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 327 transitions. [2022-11-03 01:40:10,975 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 01:40:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 327 transitions. [2022-11-03 01:40:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 01:40:10,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:10,977 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 01:40:11,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:11,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:11,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:11,195 INFO L85 PathProgramCache]: Analyzing trace with hash 20377084, now seen corresponding path program 1 times [2022-11-03 01:40:11,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:11,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592557215] [2022-11-03 01:40:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:11,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:11,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:11,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:11,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:40:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:40:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:13,079 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 01:40:13,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:13,233 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 01:40:13,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:13,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592557215] [2022-11-03 01:40:13,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592557215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:13,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1011807902] [2022-11-03 01:40:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:13,234 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:13,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:13,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:13,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 01:40:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:15,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:40:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:15,451 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 01:40:15,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:15,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1011807902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:15,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:40:15,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 01:40:15,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491395751] [2022-11-03 01:40:15,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:15,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:15,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:40:15,454 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 01:40:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:15,709 INFO L93 Difference]: Finished difference Result 524 states and 685 transitions. [2022-11-03 01:40:15,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:40:15,712 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 01:40:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:15,714 INFO L225 Difference]: With dead ends: 524 [2022-11-03 01:40:15,714 INFO L226 Difference]: Without dead ends: 313 [2022-11-03 01:40:15,715 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 01:40:15,716 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 01:40:15,717 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 01:40:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-03 01:40:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 264. [2022-11-03 01:40:15,744 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 01:40:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 331 transitions. [2022-11-03 01:40:15,747 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 331 transitions. Word has length 125 [2022-11-03 01:40:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:15,748 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 331 transitions. [2022-11-03 01:40:15,748 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 01:40:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 331 transitions. [2022-11-03 01:40:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 01:40:15,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:15,751 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 01:40:15,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:15,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:16,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:16,175 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash 92763642, now seen corresponding path program 1 times [2022-11-03 01:40:16,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:16,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747116969] [2022-11-03 01:40:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:16,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:16,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:16,180 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:16,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:40:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:17,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:40:17,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:18,068 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 01:40:18,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:18,208 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 01:40:18,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747116969] [2022-11-03 01:40:18,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747116969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [337902057] [2022-11-03 01:40:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:18,209 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:18,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:18,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 01:40:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:20,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:40:20,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:21,151 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 01:40:21,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:21,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [337902057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:21,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:40:21,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 01:40:21,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876326820] [2022-11-03 01:40:21,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:21,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:40:21,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:21,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:40:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:40:21,154 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 01:40:21,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:21,649 INFO L93 Difference]: Finished difference Result 574 states and 727 transitions. [2022-11-03 01:40:21,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:40:21,659 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 01:40:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:21,664 INFO L225 Difference]: With dead ends: 574 [2022-11-03 01:40:21,664 INFO L226 Difference]: Without dead ends: 354 [2022-11-03 01:40:21,665 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 01:40:21,666 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 52 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:21,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 509 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:40:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-03 01:40:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-03 01:40:21,686 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 01:40:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 443 transitions. [2022-11-03 01:40:21,689 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 443 transitions. Word has length 125 [2022-11-03 01:40:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:21,689 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 443 transitions. [2022-11-03 01:40:21,690 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 01:40:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 443 transitions. [2022-11-03 01:40:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 01:40:21,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:21,692 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 01:40:21,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:21,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:22,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:22,112 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:22,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:22,112 INFO L85 PathProgramCache]: Analyzing trace with hash 796653531, now seen corresponding path program 1 times [2022-11-03 01:40:22,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:22,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587094886] [2022-11-03 01:40:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:22,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:22,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:22,115 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:22,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:40:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:40:23,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:23,715 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 01:40:23,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:23,846 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 01:40:23,846 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587094886] [2022-11-03 01:40:23,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587094886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [942801851] [2022-11-03 01:40:23,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:23,847 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:23,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:23,848 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:23,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 01:40:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:40:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:26,089 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 01:40:26,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:40:26,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [942801851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:40:26,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:40:26,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-03 01:40:26,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955518248] [2022-11-03 01:40:26,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:40:26,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:40:26,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:26,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:40:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:40:26,092 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 01:40:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:26,195 INFO L93 Difference]: Finished difference Result 577 states and 729 transitions. [2022-11-03 01:40:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:40:26,196 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 01:40:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:26,198 INFO L225 Difference]: With dead ends: 577 [2022-11-03 01:40:26,198 INFO L226 Difference]: Without dead ends: 330 [2022-11-03 01:40:26,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 414 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 01:40:26,200 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 01:40:26,200 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 01:40:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-03 01:40:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2022-11-03 01:40:26,218 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 01:40:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 405 transitions. [2022-11-03 01:40:26,221 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 405 transitions. Word has length 142 [2022-11-03 01:40:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:26,221 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 405 transitions. [2022-11-03 01:40:26,221 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 01:40:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 405 transitions. [2022-11-03 01:40:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 01:40:26,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:26,224 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 01:40:26,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:26,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:26,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:26,650 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1365793231, now seen corresponding path program 1 times [2022-11-03 01:40:26,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:26,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716275574] [2022-11-03 01:40:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:26,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:26,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:26,653 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:26,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:40:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:40:28,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:28,447 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 01:40:28,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:28,587 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 01:40:28,587 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:28,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716275574] [2022-11-03 01:40:28,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716275574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:28,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [819061972] [2022-11-03 01:40:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:28,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:28,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:28,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 01:40:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:40:31,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:31,522 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 01:40:31,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:31,587 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 01:40:31,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [819061972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:31,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70088710] [2022-11-03 01:40:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:31,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:31,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:31,592 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:31,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:40:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:33,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:40:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:33,444 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 01:40:33,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:33,950 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 01:40:33,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70088710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:33,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:40:33,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 12 [2022-11-03 01:40:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334105082] [2022-11-03 01:40:33,951 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:40:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:40:33,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:40:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:40:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:40:33,954 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 01:40:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:35,766 INFO L93 Difference]: Finished difference Result 1011 states and 1282 transitions. [2022-11-03 01:40:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:40:35,767 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 01:40:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:35,771 INFO L225 Difference]: With dead ends: 1011 [2022-11-03 01:40:35,771 INFO L226 Difference]: Without dead ends: 728 [2022-11-03 01:40:35,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:40:35,773 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 824 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:35,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 2606 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:40:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-03 01:40:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2022-11-03 01:40:35,814 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 01:40:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 893 transitions. [2022-11-03 01:40:35,817 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 893 transitions. Word has length 142 [2022-11-03 01:40:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:35,818 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 893 transitions. [2022-11-03 01:40:35,818 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 01:40:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 893 transitions. [2022-11-03 01:40:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-11-03 01:40:35,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:35,828 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 01:40:35,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:36,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:36,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:36,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:40:36,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash -974779672, now seen corresponding path program 1 times [2022-11-03 01:40:36,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:40:36,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794385971] [2022-11-03 01:40:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:36,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:40:36,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:40:36,459 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:40:36,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:40:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:46,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:40:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:46,509 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 01:40:46,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:46,810 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 01:40:46,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:40:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794385971] [2022-11-03 01:40:46,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794385971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [778000613] [2022-11-03 01:40:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:46,811 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:40:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:40:46,814 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:40:46,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 01:40:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:58,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:40:58,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:58,144 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 01:40:58,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:58,282 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 01:40:58,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [778000613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:40:58,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066009421] [2022-11-03 01:40:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:58,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:58,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:58,284 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:58,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:41:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:07,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 7423 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:07,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:07,736 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 01:41:07,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:08,017 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 01:41:08,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066009421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:08,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:41:08,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2022-11-03 01:41:08,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179637658] [2022-11-03 01:41:08,019 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:08,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:41:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:08,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:41:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:41:08,022 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 01:41:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:09,775 INFO L93 Difference]: Finished difference Result 1431 states and 1853 transitions. [2022-11-03 01:41:09,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 01:41:09,776 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 01:41:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:09,779 INFO L225 Difference]: With dead ends: 1431 [2022-11-03 01:41:09,779 INFO L226 Difference]: Without dead ends: 746 [2022-11-03 01:41:09,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2683 GetRequests, 2640 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 01:41:09,782 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 134 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:09,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 2686 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:41:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-03 01:41:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 738. [2022-11-03 01:41:09,822 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 01:41:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 909 transitions. [2022-11-03 01:41:09,827 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 909 transitions. Word has length 444 [2022-11-03 01:41:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:09,827 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 909 transitions. [2022-11-03 01:41:09,827 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 01:41:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 909 transitions. [2022-11-03 01:41:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-11-03 01:41:09,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:09,838 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 01:41:09,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:10,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:10,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:10,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:10,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash -638121752, now seen corresponding path program 2 times [2022-11-03 01:41:10,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:10,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379538762] [2022-11-03 01:41:10,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:41:10,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:10,467 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:10,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:41:20,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:41:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:41:21,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:41:21,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:21,715 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 01:41:21,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:22,554 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 01:41:22,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:22,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379538762] [2022-11-03 01:41:22,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379538762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:22,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888509237] [2022-11-03 01:41:22,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:41:22,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:22,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:41:22,556 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:41:22,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 01:41:35,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:41:35,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:41:35,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:41:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:35,805 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 01:41:35,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:36,030 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 01:41:36,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [888509237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:36,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037383115] [2022-11-03 01:41:36,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:41:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:36,035 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:36,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:41:46,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:41:46,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:41:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 7687 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:47,732 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 01:41:47,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:49,534 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 01:41:49,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037383115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:49,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:41:49,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 7, 7] total 36 [2022-11-03 01:41:49,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412565427] [2022-11-03 01:41:49,536 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:49,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 01:41:49,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 01:41:49,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:41:49,541 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 01:42:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:09,842 INFO L93 Difference]: Finished difference Result 2486 states and 3329 transitions. [2022-11-03 01:42:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 01:42:09,844 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 01:42:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:09,853 INFO L225 Difference]: With dead ends: 2486 [2022-11-03 01:42:09,853 INFO L226 Difference]: Without dead ends: 1791 [2022-11-03 01:42:09,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2841 GetRequests, 2772 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1091, Invalid=3879, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 01:42:09,857 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 3049 mSDsluCounter, 16231 mSDsCounter, 0 mSdLazyCounter, 4661 mSolverCounterSat, 1012 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s 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, 16.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:09,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3201 Valid, 17255 Invalid, 5673 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1012 Valid, 4661 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time] [2022-11-03 01:42:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-11-03 01:42:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1773. [2022-11-03 01:42:09,961 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 01:42:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2163 transitions. [2022-11-03 01:42:09,967 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2163 transitions. Word has length 468 [2022-11-03 01:42:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:09,969 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2163 transitions. [2022-11-03 01:42:09,969 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 01:42:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2163 transitions. [2022-11-03 01:42:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1087 [2022-11-03 01:42:10,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:10,022 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 01:42:10,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:10,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:10,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 01:42:10,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:42:10,647 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash -372986352, now seen corresponding path program 3 times [2022-11-03 01:42:10,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:10,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161512599] [2022-11-03 01:42:10,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:42:10,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:10,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:10,652 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:10,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_732d7dde-f20d-40d0-a4aa-c55ec9ff9791/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process