./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-token-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-token-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8 --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 f6961864fd80b1152371f3ae9fd5697ae273a1dc ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-token-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8 --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 f6961864fd80b1152371f3ae9fd5697ae273a1dc .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:26:28,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:26:28,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:26:28,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:26:28,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:26:28,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:26:28,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:26:28,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:26:28,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:26:28,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:26:28,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:26:28,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:26:28,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:26:28,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:26:28,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:26:28,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:26:28,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:26:28,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:26:28,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:26:28,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:26:28,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:26:28,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:26:28,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:26:28,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:26:28,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:26:28,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:26:28,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:26:28,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:26:28,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:26:28,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:26:28,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:26:28,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:26:28,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:26:28,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:26:28,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:26:28,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:26:28,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:26:28,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:26:28,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:26:28,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:26:28,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:26:28,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:26:28,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:26:28,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:26:28,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:26:28,187 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:26:28,187 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:26:28,187 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:26:28,188 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:26:28,188 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:26:28,188 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:26:28,188 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:26:28,195 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:26:28,196 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:26:28,196 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:26:28,196 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:26:28,196 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:26:28,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:26:28,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:26:28,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:26:28,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:26:28,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:26:28,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:26:28,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:26:28,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:26:28,207 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:26:28,207 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:26:28,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:26:28,208 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:26:28,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:26:28,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:26:28,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:26:28,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:28,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:26:28,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:26:28,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:26:28,210 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:26:28,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:26:28,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:26:28,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:26:28,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:26:28,212 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6961864fd80b1152371f3ae9fd5697ae273a1dc [2021-10-13 07:26:28,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:26:28,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:26:28,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:26:28,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:26:28,516 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:26:28,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/forester-heap/sll-token-2.i [2021-10-13 07:26:28,582 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data/efb7c58bb/bd71020a1e074d3483dcee711255186a/FLAG748752858 [2021-10-13 07:26:29,097 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:26:29,098 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i [2021-10-13 07:26:29,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data/efb7c58bb/bd71020a1e074d3483dcee711255186a/FLAG748752858 [2021-10-13 07:26:29,433 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data/efb7c58bb/bd71020a1e074d3483dcee711255186a [2021-10-13 07:26:29,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:26:29,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:26:29,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:29,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:26:29,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:26:29,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b529b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:29, skipping insertion in model container [2021-10-13 07:26:29,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:29" (1/1) ... [2021-10-13 07:26:29,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:26:29,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:26:29,869 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22162,22175] [2021-10-13 07:26:29,885 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22311,22324] [2021-10-13 07:26:29,887 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22402,22415] [2021-10-13 07:26:29,889 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22484,22497] [2021-10-13 07:26:29,890 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22562,22575] [2021-10-13 07:26:29,893 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22708,22721] [2021-10-13 07:26:29,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:29,913 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:26:29,970 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22162,22175] [2021-10-13 07:26:29,972 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22311,22324] [2021-10-13 07:26:29,973 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22402,22415] [2021-10-13 07:26:29,974 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22484,22497] [2021-10-13 07:26:29,975 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22562,22575] [2021-10-13 07:26:29,976 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22708,22721] [2021-10-13 07:26:29,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:30,009 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:26:30,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30 WrapperNode [2021-10-13 07:26:30,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:30,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:30,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:26:30,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:26:30,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:30,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:26:30,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:26:30,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:26:30,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:26:30,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:26:30,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:26:30,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:26:30,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (1/1) ... [2021-10-13 07:26:30,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:30,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:30,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:26:30,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:26:30,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:26:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:26:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:26:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:26:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:26:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:26:30,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:26:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:26:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:26:30,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:26:30,620 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:26:30,621 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 07:26:30,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:30 BoogieIcfgContainer [2021-10-13 07:26:30,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:26:30,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:26:30,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:26:30,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:26:30,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:26:29" (1/3) ... [2021-10-13 07:26:30,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce9a544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:30, skipping insertion in model container [2021-10-13 07:26:30,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:30" (2/3) ... [2021-10-13 07:26:30,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce9a544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:30, skipping insertion in model container [2021-10-13 07:26:30,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:30" (3/3) ... [2021-10-13 07:26:30,633 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-token-2.i [2021-10-13 07:26:30,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:26:30,638 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-13 07:26:30,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:26:30,707 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:26:30,708 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-13 07:26:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 40 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:26:30,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:30,734 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:26:30,735 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:30,740 INFO L82 PathProgramCache]: Analyzing trace with hash 177379778, now seen corresponding path program 1 times [2021-10-13 07:26:30,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:30,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561047061] [2021-10-13 07:26:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:30,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:30,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:30,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561047061] [2021-10-13 07:26:30,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561047061] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:30,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:30,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:26:30,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559812854] [2021-10-13 07:26:30,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:26:30,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:30,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:26:30,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:26:30,970 INFO L87 Difference]: Start difference. First operand has 41 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 40 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:30,987 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2021-10-13 07:26:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:26:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:26:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:31,015 INFO L225 Difference]: With dead ends: 81 [2021-10-13 07:26:31,015 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 07:26:31,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:26:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 07:26:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 07:26:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-10-13 07:26:31,051 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 5 [2021-10-13 07:26:31,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:31,051 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-10-13 07:26:31,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,052 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-10-13 07:26:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:26:31,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:31,053 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:26:31,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:26:31,054 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:31,055 INFO L82 PathProgramCache]: Analyzing trace with hash 176613157, now seen corresponding path program 1 times [2021-10-13 07:26:31,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:31,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283068013] [2021-10-13 07:26:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:31,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:31,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:31,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283068013] [2021-10-13 07:26:31,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283068013] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:31,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:31,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:26:31,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156322164] [2021-10-13 07:26:31,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:26:31,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:31,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:26:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:26:31,124 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:31,165 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-10-13 07:26:31,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:26:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:26:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:31,167 INFO L225 Difference]: With dead ends: 38 [2021-10-13 07:26:31,167 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 07:26:31,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:26:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 07:26:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-13 07:26:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-10-13 07:26:31,174 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 5 [2021-10-13 07:26:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:31,174 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-10-13 07:26:31,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-10-13 07:26:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:26:31,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:31,176 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:26:31,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:26:31,176 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:31,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1179997057, now seen corresponding path program 1 times [2021-10-13 07:26:31,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:31,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141754665] [2021-10-13 07:26:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:31,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:31,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:31,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141754665] [2021-10-13 07:26:31,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141754665] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:31,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:31,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:26:31,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792485261] [2021-10-13 07:26:31,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:26:31,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:26:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:26:31,286 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:31,362 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-13 07:26:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:26:31,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:26:31,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:31,366 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:26:31,367 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 07:26:31,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:26:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 07:26:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2021-10-13 07:26:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-10-13 07:26:31,379 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 6 [2021-10-13 07:26:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:31,381 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-10-13 07:26:31,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-10-13 07:26:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:26:31,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:31,382 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:31,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:26:31,383 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash -941369743, now seen corresponding path program 1 times [2021-10-13 07:26:31,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:31,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59117065] [2021-10-13 07:26:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:31,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:31,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:31,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59117065] [2021-10-13 07:26:31,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59117065] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:31,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:31,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:26:31,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270362298] [2021-10-13 07:26:31,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:26:31,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:26:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:26:31,446 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:31,540 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-13 07:26:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:31,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:26:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:31,542 INFO L225 Difference]: With dead ends: 34 [2021-10-13 07:26:31,542 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 07:26:31,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:31,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 07:26:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 07:26:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-10-13 07:26:31,556 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 11 [2021-10-13 07:26:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:31,556 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-10-13 07:26:31,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-10-13 07:26:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:26:31,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:31,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:31,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:26:31,558 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash -941332007, now seen corresponding path program 1 times [2021-10-13 07:26:31,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:31,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727803697] [2021-10-13 07:26:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:31,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:31,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:31,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727803697] [2021-10-13 07:26:31,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727803697] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:31,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:31,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:26:31,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69942727] [2021-10-13 07:26:31,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:26:31,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:31,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:26:31,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:26:31,708 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:31,834 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-10-13 07:26:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:31,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:26:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:31,836 INFO L225 Difference]: With dead ends: 67 [2021-10-13 07:26:31,837 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 07:26:31,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 07:26:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-10-13 07:26:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-10-13 07:26:31,859 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 11 [2021-10-13 07:26:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:31,862 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-10-13 07:26:31,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-10-13 07:26:31,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:26:31,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:31,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:31,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:26:31,866 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:31,872 INFO L82 PathProgramCache]: Analyzing trace with hash -207114599, now seen corresponding path program 1 times [2021-10-13 07:26:31,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:31,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203133387] [2021-10-13 07:26:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:31,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:32,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:32,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203133387] [2021-10-13 07:26:32,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203133387] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:32,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:32,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:26:32,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533936435] [2021-10-13 07:26:32,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:32,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:26:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:32,068 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:32,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:32,210 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-10-13 07:26:32,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:26:32,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 07:26:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:32,215 INFO L225 Difference]: With dead ends: 49 [2021-10-13 07:26:32,216 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 07:26:32,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:26:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 07:26:32,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-10-13 07:26:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-10-13 07:26:32,223 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2021-10-13 07:26:32,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:32,224 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-10-13 07:26:32,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-10-13 07:26:32,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:26:32,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:32,225 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:32,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:26:32,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:32,226 INFO L82 PathProgramCache]: Analyzing trace with hash -542473854, now seen corresponding path program 1 times [2021-10-13 07:26:32,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:26:32,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083079572] [2021-10-13 07:26:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:32,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:26:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:32,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:26:32,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083079572] [2021-10-13 07:26:32,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083079572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:26:32,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581456786] [2021-10-13 07:26:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:32,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:32,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:32,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:32,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:26:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 07:26:32,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:32,591 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-13 07:26:32,592 INFO L388 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 3 case distinctions, treesize of input 15 treesize of output 31 [2021-10-13 07:26:32,797 INFO L388 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 [2021-10-13 07:26:33,154 INFO L354 Elim1Store]: treesize reduction 120, result has 23.6 percent of original size [2021-10-13 07:26:33,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 42 treesize of output 67 [2021-10-13 07:26:33,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:33,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:26:33,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:33,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 07:26:34,750 INFO L354 Elim1Store]: treesize reduction 72, result has 40.5 percent of original size [2021-10-13 07:26:34,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 105 treesize of output 141 [2021-10-13 07:26:34,794 INFO L354 Elim1Store]: treesize reduction 118, result has 13.9 percent of original size [2021-10-13 07:26:34,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 112 [2021-10-13 07:26:34,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:26:34,826 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-13 07:26:34,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 108 [2021-10-13 07:26:35,217 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-10-13 07:26:35,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-10-13 07:26:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:35,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:35,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:35,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 07:26:35,367 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:35,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-13 07:26:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:37,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581456786] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:37,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [194371631] [2021-10-13 07:26:37,527 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-10-13 07:26:37,527 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:26:37,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:26:37,536 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:26:37,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:26:37,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,611 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:37,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-10-13 07:26:37,612 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:37,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:26:37,616 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:37,617 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,618 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:37,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-10-13 07:26:37,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-13 07:26:37,623 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:37,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,625 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:37,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:26:37,627 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:26:37,627 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:37,628 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 07:26:37,629 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:37,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-10-13 07:26:37,630 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:26:37,630 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:26:37,634 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 201 [2021-10-13 07:26:37,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:37,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:37,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:37,708 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:26:37,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 07:26:37,710 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-13 07:26:37,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,717 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-13 07:26:37,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:26:37,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:26:37,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,742 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:37,744 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 170 [2021-10-13 07:26:37,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:26:37,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:194, output treesize:170 [2021-10-13 07:26:37,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 07:26:37,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:37,962 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_18| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-10-13 07:26:37,965 INFO L168 Benchmark]: Toolchain (without parser) took 8527.80 ms. Allocated memory was 104.9 MB in the beginning and 159.4 MB in the end (delta: 54.5 MB). Free memory was 58.9 MB in the beginning and 126.5 MB in the end (delta: -67.6 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:37,966 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 104.9 MB. Free memory was 76.7 MB in the beginning and 76.6 MB in the end (delta: 53.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:26:37,966 INFO L168 Benchmark]: CACSL2BoogieTranslator took 569.15 ms. Allocated memory is still 104.9 MB. Free memory was 58.7 MB in the beginning and 71.8 MB in the end (delta: -13.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:37,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.11 ms. Allocated memory is still 104.9 MB. Free memory was 71.8 MB in the beginning and 69.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:37,967 INFO L168 Benchmark]: Boogie Preprocessor took 29.62 ms. Allocated memory is still 104.9 MB. Free memory was 69.5 MB in the beginning and 68.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:37,967 INFO L168 Benchmark]: RCFGBuilder took 532.07 ms. Allocated memory is still 104.9 MB. Free memory was 68.0 MB in the beginning and 53.1 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:37,968 INFO L168 Benchmark]: TraceAbstraction took 7339.14 ms. Allocated memory was 104.9 MB in the beginning and 159.4 MB in the end (delta: 54.5 MB). Free memory was 52.6 MB in the beginning and 126.5 MB in the end (delta: -73.9 MB). Peak memory consumption was 46.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:37,970 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 104.9 MB. Free memory was 76.7 MB in the beginning and 76.6 MB in the end (delta: 53.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 569.15 ms. Allocated memory is still 104.9 MB. Free memory was 58.7 MB in the beginning and 71.8 MB in the end (delta: -13.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.11 ms. Allocated memory is still 104.9 MB. Free memory was 71.8 MB in the beginning and 69.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.62 ms. Allocated memory is still 104.9 MB. Free memory was 69.5 MB in the beginning and 68.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 532.07 ms. Allocated memory is still 104.9 MB. Free memory was 68.0 MB in the beginning and 53.1 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7339.14 ms. Allocated memory was 104.9 MB in the beginning and 159.4 MB in the end (delta: 54.5 MB). Free memory was 52.6 MB in the beginning and 126.5 MB in the end (delta: -73.9 MB). Peak memory consumption was 46.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_18| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_18|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:26:38,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:26:40,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:26:40,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:26:40,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:26:40,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:26:40,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:26:40,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:26:40,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:26:40,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:26:40,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:26:40,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:26:40,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:26:40,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:26:40,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:26:40,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:26:40,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:26:40,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:26:40,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:26:40,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:26:40,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:26:40,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:26:40,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:26:40,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:26:40,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:26:40,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:26:40,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:26:40,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:26:40,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:26:40,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:26:40,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:26:40,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:26:40,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:26:40,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:26:40,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:26:40,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:26:40,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:26:40,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:26:40,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:26:40,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:26:40,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:26:40,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:26:40,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:26:40,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:26:40,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:26:40,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:26:40,540 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:26:40,540 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:26:40,540 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:26:40,541 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:26:40,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:26:40,541 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:26:40,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:26:40,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:26:40,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:26:40,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:26:40,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:26:40,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:26:40,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:26:40,545 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:26:40,545 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:26:40,545 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:26:40,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:26:40,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:26:40,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:26:40,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:26:40,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:26:40,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:26:40,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:26:40,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:40,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:26:40,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:26:40,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:26:40,548 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:26:40,548 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:40,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:26:40,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:26:40,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:26:40,549 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_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6961864fd80b1152371f3ae9fd5697ae273a1dc [2021-10-13 07:26:40,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:26:40,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:26:40,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:26:40,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:26:40,949 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:26:40,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/forester-heap/sll-token-2.i [2021-10-13 07:26:41,011 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data/fb1407c1c/758ce144418c4defbd5d76ce7b4e1d54/FLAGb6fc796ab [2021-10-13 07:26:41,545 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:26:41,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i [2021-10-13 07:26:41,558 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data/fb1407c1c/758ce144418c4defbd5d76ce7b4e1d54/FLAGb6fc796ab [2021-10-13 07:26:41,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/data/fb1407c1c/758ce144418c4defbd5d76ce7b4e1d54 [2021-10-13 07:26:41,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:26:41,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:26:41,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:41,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:26:41,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:26:41,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:41" (1/1) ... [2021-10-13 07:26:41,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44791095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:41, skipping insertion in model container [2021-10-13 07:26:41,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:26:41" (1/1) ... [2021-10-13 07:26:41,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:26:41,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:26:42,272 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22162,22175] [2021-10-13 07:26:42,276 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22311,22324] [2021-10-13 07:26:42,289 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22402,22415] [2021-10-13 07:26:42,293 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22484,22497] [2021-10-13 07:26:42,295 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22562,22575] [2021-10-13 07:26:42,302 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22708,22721] [2021-10-13 07:26:42,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:42,324 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:26:42,360 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22162,22175] [2021-10-13 07:26:42,362 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22311,22324] [2021-10-13 07:26:42,364 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22402,22415] [2021-10-13 07:26:42,365 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22484,22497] [2021-10-13 07:26:42,366 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22562,22575] [2021-10-13 07:26:42,368 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/sv-benchmarks/c/forester-heap/sll-token-2.i[22708,22721] [2021-10-13 07:26:42,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:26:42,403 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:26:42,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42 WrapperNode [2021-10-13 07:26:42,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:26:42,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:42,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:26:42,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:26:42,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:26:42,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:26:42,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:26:42,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:26:42,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:26:42,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:26:42,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:26:42,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:26:42,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (1/1) ... [2021-10-13 07:26:42,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:26:42,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:42,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:26:42,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:26:42,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:26:42,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:26:42,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:26:42,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:26:42,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:26:42,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:26:42,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:26:42,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:26:42,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:26:42,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:26:43,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:26:43,127 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-13 07:26:43,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:43 BoogieIcfgContainer [2021-10-13 07:26:43,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:26:43,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:26:43,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:26:43,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:26:43,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:26:41" (1/3) ... [2021-10-13 07:26:43,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f30b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:43, skipping insertion in model container [2021-10-13 07:26:43,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:26:42" (2/3) ... [2021-10-13 07:26:43,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f30b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:26:43, skipping insertion in model container [2021-10-13 07:26:43,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:43" (3/3) ... [2021-10-13 07:26:43,137 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-token-2.i [2021-10-13 07:26:43,143 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:26:43,143 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-13 07:26:43,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:26:43,198 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:26:43,198 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-13 07:26:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 42 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:26:43,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:43,218 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:26:43,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:43,224 INFO L82 PathProgramCache]: Analyzing trace with hash 28699849, now seen corresponding path program 1 times [2021-10-13 07:26:43,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:43,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463909924] [2021-10-13 07:26:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:43,238 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:43,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:43,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:43,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:26:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:43,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:26:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:43,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:43,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:43,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463909924] [2021-10-13 07:26:43,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463909924] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:43,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:43,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:26:43,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648021389] [2021-10-13 07:26:43,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:26:43,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:43,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:26:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:26:43,426 INFO L87 Difference]: Start difference. First operand has 43 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 42 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:43,602 INFO L93 Difference]: Finished difference Result 82 states and 128 transitions. [2021-10-13 07:26:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:26:43,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:26:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:43,612 INFO L225 Difference]: With dead ends: 82 [2021-10-13 07:26:43,612 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 07:26:43,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:26:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 07:26:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-13 07:26:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-10-13 07:26:43,685 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 5 [2021-10-13 07:26:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:43,686 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-10-13 07:26:43,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-10-13 07:26:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:26:43,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:43,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:26:43,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:43,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:43,888 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:43,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:43,889 INFO L82 PathProgramCache]: Analyzing trace with hash 889651804, now seen corresponding path program 1 times [2021-10-13 07:26:43,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:43,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434361940] [2021-10-13 07:26:43,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:43,892 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:43,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:43,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:43,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:26:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:43,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:26:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:44,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:44,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:44,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434361940] [2021-10-13 07:26:44,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434361940] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:44,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:44,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:26:44,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467945255] [2021-10-13 07:26:44,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:26:44,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:44,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:26:44,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:26:44,076 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:44,214 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-13 07:26:44,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:26:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:26:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:44,218 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:26:44,218 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 07:26:44,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:26:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 07:26:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2021-10-13 07:26:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-10-13 07:26:44,231 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 6 [2021-10-13 07:26:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:44,231 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-10-13 07:26:44,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-10-13 07:26:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:26:44,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:44,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:44,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:44,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:44,445 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1061836619, now seen corresponding path program 1 times [2021-10-13 07:26:44,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:44,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571153984] [2021-10-13 07:26:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:44,447 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:44,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:44,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:44,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:26:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:26:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:44,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-13 07:26:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:44,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:44,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:44,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571153984] [2021-10-13 07:26:44,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571153984] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:44,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:44,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-10-13 07:26:44,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027553003] [2021-10-13 07:26:44,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:26:44,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:44,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:26:44,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:26:44,778 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:45,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:45,060 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-13 07:26:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:26:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:45,061 INFO L225 Difference]: With dead ends: 34 [2021-10-13 07:26:45,061 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 07:26:45,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 07:26:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 07:26:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-10-13 07:26:45,067 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 11 [2021-10-13 07:26:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:45,067 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-10-13 07:26:45,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-10-13 07:26:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:26:45,068 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:45,068 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:45,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:45,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:45,282 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:45,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:45,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1061798883, now seen corresponding path program 1 times [2021-10-13 07:26:45,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:45,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220275322] [2021-10-13 07:26:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:45,283 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:45,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:45,284 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:45,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:26:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:26:45,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:45,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:26:45,511 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 07:26:45,512 INFO L388 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 1 case distinctions, treesize of input 46 treesize of output 35 [2021-10-13 07:26:45,534 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 07:26:45,534 INFO L388 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 35 treesize of output 34 [2021-10-13 07:26:45,550 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:26:45,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-10-13 07:26:45,686 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 07:26:45,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-10-13 07:26:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:45,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:45,800 INFO L354 Elim1Store]: treesize reduction 28, result has 26.3 percent of original size [2021-10-13 07:26:45,800 INFO L388 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 1 case distinctions, treesize of input 45 treesize of output 34 [2021-10-13 07:26:45,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:45,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2021-10-13 07:26:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:46,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:46,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220275322] [2021-10-13 07:26:46,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220275322] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:26:46,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:26:46,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 07:26:46,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802648040] [2021-10-13 07:26:46,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:26:46,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:26:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:26:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:26:46,027 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:26:46,630 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-10-13 07:26:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:26:46,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:26:46,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:26:46,632 INFO L225 Difference]: With dead ends: 66 [2021-10-13 07:26:46,632 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 07:26:46,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:26:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 07:26:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-10-13 07:26:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-13 07:26:46,638 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 11 [2021-10-13 07:26:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:26:46,645 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-13 07:26:46,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:26:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-13 07:26:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:26:46,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:26:46,647 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:26:46,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:26:46,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:26:46,859 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:26:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:26:46,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1843657908, now seen corresponding path program 1 times [2021-10-13 07:26:46,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:26:46,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740918700] [2021-10-13 07:26:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:46,861 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:26:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:26:46,862 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:26:46,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:26:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:47,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:26:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:47,045 INFO L388 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 [2021-10-13 07:26:47,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:26:47,139 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:26:47,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 07:26:47,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:47,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:26:47,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:47,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 07:26:47,500 INFO L354 Elim1Store]: treesize reduction 118, result has 13.9 percent of original size [2021-10-13 07:26:47,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 69 [2021-10-13 07:26:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:26:47,552 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-13 07:26:47,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 65 [2021-10-13 07:26:47,574 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-13 07:26:47,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 57 [2021-10-13 07:26:48,135 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-10-13 07:26:48,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-10-13 07:26:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:48,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:48,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:48,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 07:26:50,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_10| (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_2)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_10| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_10|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_10|))))) is different from false [2021-10-13 07:26:50,409 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:50,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-13 07:26:52,607 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.offset_35 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_35 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_10| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_35))) (= (_ bv0 32) (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_3)))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_35 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_35) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_35) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_35 v_DerPreprocessor_2))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_10| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_10|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_35 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_10|)))))))) is different from false [2021-10-13 07:26:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:26:52,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:26:52,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740918700] [2021-10-13 07:26:52,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740918700] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:52,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1015906174] [2021-10-13 07:26:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:52,638 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:26:52,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:26:52,641 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:26:52,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:26:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:52,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:26:52,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:52,912 INFO L388 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 [2021-10-13 07:26:52,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:26:52,958 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:52,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:26:52,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:53,025 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-10-13 07:26:53,026 INFO L388 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 2 case distinctions, treesize of input 39 treesize of output 39 [2021-10-13 07:26:53,078 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:26:53,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-10-13 07:26:53,422 INFO L354 Elim1Store]: treesize reduction 118, result has 13.9 percent of original size [2021-10-13 07:26:53,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 72 [2021-10-13 07:26:53,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:26:53,481 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-13 07:26:53,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 68 [2021-10-13 07:26:53,507 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-13 07:26:53,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 60 [2021-10-13 07:26:54,083 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-10-13 07:26:54,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-10-13 07:26:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:54,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:54,139 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:54,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 07:26:56,178 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_13| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_13|))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_5)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_13| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_13|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)))) is different from false [2021-10-13 07:26:56,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:56,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-13 07:26:58,464 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_13| (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_40 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_40 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_6)))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_40 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_40) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_40) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_40 v_DerPreprocessor_5))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_13| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_13|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_40)))) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_40 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_13|)))))) is different from false [2021-10-13 07:26:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:26:58,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1015906174] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:26:58,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667330872] [2021-10-13 07:26:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:26:58,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:26:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:26:58,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:26:58,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:26:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:26:58,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:26:58,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:26:58,688 INFO L388 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 [2021-10-13 07:26:58,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:26:58,778 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:26:58,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 07:26:58,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:58,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:26:58,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:26:58,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 07:26:59,149 INFO L354 Elim1Store]: treesize reduction 118, result has 13.9 percent of original size [2021-10-13 07:26:59,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 75 [2021-10-13 07:26:59,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:26:59,192 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-13 07:26:59,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 71 [2021-10-13 07:26:59,214 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-13 07:26:59,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 63 [2021-10-13 07:26:59,831 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-10-13 07:26:59,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-10-13 07:26:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:26:59,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:26:59,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:26:59,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 07:27:01,934 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_16| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_8)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_16| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_16|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_16|))))) is different from false [2021-10-13 07:27:02,057 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:02,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-13 07:27:04,192 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_16| (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_45 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_45 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_9)))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_45 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_45) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_45) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_45 v_DerPreprocessor_8))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_16| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_16|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_45))) (not (= (_ bv0 1) (select (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_45 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_16|))))) is different from false [2021-10-13 07:27:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:27:04,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667330872] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:27:04,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:27:04,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-10-13 07:27:04,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131431610] [2021-10-13 07:27:04,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:27:04,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:27:04,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:27:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=34, Unknown=6, NotChecked=90, Total=156 [2021-10-13 07:27:04,237 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:06,430 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~head~0.base c_ULTIMATE.start_main_~x~0.base)) (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_13| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_13|))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_5)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_13| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_13|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)))) (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_10| (_ BitVec 32))) (or (= (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_2)))) (store .cse1 |v_ULTIMATE.start_main_#t~malloc7.base_10| (store (select .cse1 |v_ULTIMATE.start_main_#t~malloc7.base_10|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_10|))))) (exists ((v_arrayElimCell_9 (_ BitVec 1))) (let ((.cse2 (bvneg v_arrayElimCell_9))) (and (= (_ bv0 1) (bvadd (bvneg .cse2) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (select |c_#valid| c_ULTIMATE.start_main_~head~0.base)))))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)) (_ bv0 32)) (= c_ULTIMATE.start_main_~head~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_16| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (= (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_8)))) (store .cse3 |v_ULTIMATE.start_main_#t~malloc7.base_16| (store (select .cse3 |v_ULTIMATE.start_main_#t~malloc7.base_16|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_16|))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~x~0.base))) (_ bv1 1)))) is different from false [2021-10-13 07:27:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:27:06,906 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-13 07:27:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:27:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:27:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:27:06,908 INFO L225 Difference]: With dead ends: 60 [2021-10-13 07:27:06,908 INFO L226 Difference]: Without dead ends: 58 [2021-10-13 07:27:06,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 14475.4ms TimeCoverageRelationStatistics Valid=33, Invalid=44, Unknown=7, NotChecked=126, Total=210 [2021-10-13 07:27:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-13 07:27:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2021-10-13 07:27:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-13 07:27:06,919 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 14 [2021-10-13 07:27:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:27:06,919 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-13 07:27:06,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:27:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-13 07:27:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:27:06,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:27:06,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:27:06,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:07,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:07,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:27:07,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:27:07,534 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:27:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:27:07,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1359067491, now seen corresponding path program 1 times [2021-10-13 07:27:07,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:27:07,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791817453] [2021-10-13 07:27:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:27:07,536 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:27:07,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:27:07,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:27:07,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:27:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:27:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:27:07,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:27:07,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:27:07,803 INFO L388 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 89 treesize of output 65 [2021-10-13 07:27:07,814 INFO L388 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 65 treesize of output 41 [2021-10-13 07:27:07,822 INFO L388 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 46 treesize of output 38 [2021-10-13 07:27:07,839 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:27:07,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-10-13 07:27:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-10-13 07:27:08,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-10-13 07:27:08,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:27:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:27:08,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:27:08,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:08,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-13 07:27:08,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 322 [2021-10-13 07:27:08,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:08,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 454 treesize of output 462 [2021-10-13 07:27:08,430 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:27:08,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 658 [2021-10-13 07:27:08,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1246 treesize of output 1190 [2021-10-13 07:27:08,930 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:27:08,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 538 treesize of output 1 [2021-10-13 07:28:28,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-10-13 07:28:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:28:28,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:28:28,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791817453] [2021-10-13 07:28:28,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791817453] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:28:28,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:28:28,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-13 07:28:28,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358861367] [2021-10-13 07:28:28,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:28:28,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:28:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:28:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:28:28,233 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:28:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:28:28,927 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-13 07:28:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:28:28,928 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 07:28:28,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:28:28,928 INFO L225 Difference]: With dead ends: 58 [2021-10-13 07:28:28,929 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 07:28:28,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:28:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 07:28:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-10-13 07:28:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:28:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-10-13 07:28:28,944 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 15 [2021-10-13 07:28:28,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:28:28,944 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-10-13 07:28:28,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:28:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-10-13 07:28:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:28:28,946 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:28:28,946 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:28:28,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:28:29,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:28:29,156 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:28:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:28:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1831002301, now seen corresponding path program 2 times [2021-10-13 07:28:29,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:28:29,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754823474] [2021-10-13 07:28:29,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:28:29,158 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:28:29,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:28:29,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:28:29,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:28:29,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:28:29,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:28:29,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:28:29,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:28:29,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:28:29,408 INFO L388 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 [2021-10-13 07:28:29,484 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:28:29,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-10-13 07:28:29,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:29,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:28:29,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:28:29,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 07:28:29,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:29,696 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-10-13 07:28:29,799 INFO L354 Elim1Store]: treesize reduction 184, result has 12.4 percent of original size [2021-10-13 07:28:29,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 92 [2021-10-13 07:28:29,867 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-13 07:28:29,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 96 [2021-10-13 07:28:30,725 INFO L354 Elim1Store]: treesize reduction 226, result has 11.0 percent of original size [2021-10-13 07:28:30,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 140 treesize of output 129 [2021-10-13 07:28:30,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:28:30,831 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-10-13 07:28:30,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 125 [2021-10-13 07:28:30,878 INFO L354 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2021-10-13 07:28:30,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 116 [2021-10-13 07:28:32,012 INFO L354 Elim1Store]: treesize reduction 77, result has 4.9 percent of original size [2021-10-13 07:28:32,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 40 [2021-10-13 07:28:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:28:32,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:28:32,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:32,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 07:28:34,169 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_22| (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_14)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_22| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_22|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_22|))))) is different from false [2021-10-13 07:28:34,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:34,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-13 07:28:36,390 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.base_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_56 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_22| (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_56 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_22|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_56)))) (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_15)))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_56 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_56) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_56) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_56 v_DerPreprocessor_14))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_22| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_22|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)))) is different from false [2021-10-13 07:28:36,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:36,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-10-13 07:28:38,937 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.offset_57 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_57 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_56 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_22| (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (let ((.cse3 (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_57 (_ bv1 1)))) (or (= (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_16)))) (store .cse2 v_ULTIMATE.start_main_~x~0.base_57 (store (store (select .cse2 v_ULTIMATE.start_main_~x~0.base_57) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_57) (_ bv0 32)) v_ULTIMATE.start_main_~x~0.offset_57 v_DerPreprocessor_15))))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_56 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_56) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_56) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_56 v_DerPreprocessor_14))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_22| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_22|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_57)))))) (not (= (_ bv0 1) (bvneg (select .cse3 v_ULTIMATE.start_main_~x~0.base_56)))) (not (= (_ bv0 1) (bvneg (bvneg (select (store .cse3 v_ULTIMATE.start_main_~x~0.base_56 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_22|)))))))) is different from false [2021-10-13 07:28:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-10-13 07:28:38,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:28:38,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754823474] [2021-10-13 07:28:38,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754823474] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:28:38,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2006514299] [2021-10-13 07:28:38,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:28:38,967 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:28:38,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:28:38,969 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:28:38,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:28:39,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:28:39,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:28:39,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:28:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:28:39,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:28:39,337 INFO L388 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 [2021-10-13 07:28:39,382 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:28:39,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-10-13 07:28:39,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:39,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:28:39,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:28:39,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 07:28:39,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:39,537 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-13 07:28:39,621 INFO L354 Elim1Store]: treesize reduction 184, result has 12.4 percent of original size [2021-10-13 07:28:39,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 86 [2021-10-13 07:28:39,712 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-13 07:28:39,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 90 [2021-10-13 07:28:40,588 INFO L354 Elim1Store]: treesize reduction 226, result has 11.0 percent of original size [2021-10-13 07:28:40,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 146 treesize of output 135 [2021-10-13 07:28:40,652 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-13 07:28:40,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 130 [2021-10-13 07:28:40,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:28:40,740 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-10-13 07:28:40,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 68 [2021-10-13 07:28:41,775 INFO L354 Elim1Store]: treesize reduction 77, result has 4.9 percent of original size [2021-10-13 07:28:41,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 40 [2021-10-13 07:28:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:28:41,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:28:41,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:41,836 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 07:28:43,862 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_25| (_ BitVec 32))) (or (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_19)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_25| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_25|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_25|))))) is different from false [2021-10-13 07:28:43,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:43,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-13 07:28:46,081 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_25| (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_63 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_63 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_63 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_25|)))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_63))) (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_20)))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_63 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_63) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_63) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_63 v_DerPreprocessor_19))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_25| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_25|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)))) is different from false [2021-10-13 07:28:46,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:46,330 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 191 [2021-10-13 07:28:48,727 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_25| (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_64 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_63 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_64 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_63 (_ BitVec 32))) (let ((.cse3 (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_64 (_ bv1 1)))) (or (= (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_21)))) (store .cse2 v_ULTIMATE.start_main_~x~0.base_64 (store (store (select .cse2 v_ULTIMATE.start_main_~x~0.base_64) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_64) (_ bv0 32)) v_ULTIMATE.start_main_~x~0.offset_64 v_DerPreprocessor_20))))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_63 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_63) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_63) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_63 v_DerPreprocessor_19))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_25| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_25|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_64))) (not (= (_ bv0 1) (bvneg (bvneg (select .cse3 v_ULTIMATE.start_main_~x~0.base_63))))) (not (= (_ bv0 1) (bvneg (bvneg (select (store .cse3 v_ULTIMATE.start_main_~x~0.base_63 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_25|)))))))) is different from false [2021-10-13 07:28:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-10-13 07:28:48,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2006514299] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:28:48,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758732821] [2021-10-13 07:28:48,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:28:48,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:28:48,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:28:48,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:28:48,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:28:49,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:28:49,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:28:49,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:28:49,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:28:49,161 INFO L388 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 [2021-10-13 07:28:49,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:28:49,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:49,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:28:49,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:28:49,261 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-10-13 07:28:49,261 INFO L388 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 2 case distinctions, treesize of input 39 treesize of output 39 [2021-10-13 07:28:49,311 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:28:49,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-13 07:28:49,458 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:49,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-13 07:28:49,543 INFO L354 Elim1Store]: treesize reduction 184, result has 12.4 percent of original size [2021-10-13 07:28:49,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 86 [2021-10-13 07:28:49,605 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-13 07:28:49,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 90 [2021-10-13 07:28:50,517 INFO L354 Elim1Store]: treesize reduction 226, result has 11.0 percent of original size [2021-10-13 07:28:50,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 145 treesize of output 134 [2021-10-13 07:28:50,575 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-13 07:28:50,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 129 [2021-10-13 07:28:50,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:28:50,663 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-10-13 07:28:50,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 68 [2021-10-13 07:28:51,771 INFO L354 Elim1Store]: treesize reduction 77, result has 4.9 percent of original size [2021-10-13 07:28:51,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 40 [2021-10-13 07:28:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:28:51,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:28:51,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:51,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-13 07:28:53,868 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_28| (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_28|)))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_24)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_28| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_28|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)))) is different from false [2021-10-13 07:28:53,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:53,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-10-13 07:28:56,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_28| (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_70 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_70 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_70 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_28|)))) (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_25)))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_70 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_70) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_70) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_70 v_DerPreprocessor_24))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_28| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_28|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_70)))))) is different from false [2021-10-13 07:28:56,302 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:28:56,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 192 [2021-10-13 07:28:58,712 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_28| (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_71 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_70 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_71 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_70 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (let ((.cse3 (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_71 (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_71)))) (= (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_26)))) (store .cse2 v_ULTIMATE.start_main_~x~0.base_71 (store (store (select .cse2 v_ULTIMATE.start_main_~x~0.base_71) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_71) (_ bv0 32)) v_ULTIMATE.start_main_~x~0.offset_71 v_DerPreprocessor_25))))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_70 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_70) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_70) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_70 v_DerPreprocessor_24))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_28| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_28|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (bvneg (select .cse3 v_ULTIMATE.start_main_~x~0.base_70)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store .cse3 v_ULTIMATE.start_main_~x~0.base_70 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_28|)))))))))) is different from false [2021-10-13 07:28:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-10-13 07:28:58,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758732821] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:28:58,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:28:58,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2021-10-13 07:28:58,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230109625] [2021-10-13 07:28:58,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 07:28:58,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:28:58,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 07:28:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=47, Unknown=9, NotChecked=180, Total=272 [2021-10-13 07:28:58,741 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:08,612 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~head~0.base c_ULTIMATE.start_main_~x~0.base)) (exists ((v_arrayElimCell_67 (_ BitVec 1)) (v_ULTIMATE.start_main_~x~0.offset_53 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_53 (_ BitVec 32))) (let ((.cse0 (bvneg (bvneg v_arrayElimCell_67)))) (and (= (_ bv0 32) (select (select |c_#memory_int| v_ULTIMATE.start_main_~x~0.base_53) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_53))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg .cse0))) (not (= c_ULTIMATE.start_main_~head~0.base v_ULTIMATE.start_main_~x~0.base_53)) (= (_ bv0 1) (bvadd .cse0 (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_53)))) (not (= c_ULTIMATE.start_main_~x~0.base v_ULTIMATE.start_main_~x~0.base_53))))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)) (_ bv0 32)) (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_25| (_ BitVec 32))) (or (= (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_19)))) (store .cse1 |v_ULTIMATE.start_main_#t~malloc7.base_25| (store (select .cse1 |v_ULTIMATE.start_main_#t~malloc7.base_25|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_25|))))) (= c_ULTIMATE.start_main_~head~0.offset (_ bv0 32)) (exists ((v_arrayElimCell_61 (_ BitVec 1)) (v_arrayElimCell_66 (_ BitVec 1))) (let ((.cse3 (bvneg (bvneg (bvneg (bvneg v_arrayElimCell_61))))) (.cse2 (bvneg (bvneg (bvneg v_arrayElimCell_66))))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~head~0.base))) .cse2)) (= (_ bv0 1) (bvadd (bvneg (bvneg .cse3)) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse3 .cse2))))) (forall ((v_DerPreprocessor_14 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_22| (_ BitVec 32))) (or (= (select (select (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_14)))) (store .cse4 |v_ULTIMATE.start_main_#t~malloc7.base_22| (store (select .cse4 |v_ULTIMATE.start_main_#t~malloc7.base_22|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_22|))))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~x~0.base))) (_ bv1 1))) (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_28| (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_28|)))) (= (select (select (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_24)))) (store .cse5 |v_ULTIMATE.start_main_#t~malloc7.base_28| (store (select .cse5 |v_ULTIMATE.start_main_#t~malloc7.base_28|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32))))) is different from false [2021-10-13 07:29:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:14,013 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2021-10-13 07:29:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:29:14,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 07:29:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:14,016 INFO L225 Difference]: With dead ends: 88 [2021-10-13 07:29:14,016 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 07:29:14,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 10 IntricatePredicates, 1 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 24196.9ms TimeCoverageRelationStatistics Valid=68, Invalid=117, Unknown=11, NotChecked=310, Total=506 [2021-10-13 07:29:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 07:29:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 48. [2021-10-13 07:29:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-10-13 07:29:14,026 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 17 [2021-10-13 07:29:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:14,026 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-10-13 07:29:14,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-10-13 07:29:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:29:14,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:14,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:14,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:14,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:14,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:14,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:29:14,642 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:29:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1751391308, now seen corresponding path program 1 times [2021-10-13 07:29:14,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:29:14,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300797999] [2021-10-13 07:29:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:14,643 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:29:14,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:29:14,644 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:29:14,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:29:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:29:14,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:15,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:29:15,009 INFO L388 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 [2021-10-13 07:29:15,085 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:29:15,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-13 07:29:15,098 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:15,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:29:15,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:15,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 07:29:15,275 INFO L354 Elim1Store]: treesize reduction 118, result has 13.9 percent of original size [2021-10-13 07:29:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 40 [2021-10-13 07:29:15,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:29:15,348 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-10-13 07:29:15,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 48 [2021-10-13 07:29:16,095 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-10-13 07:29:16,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-13 07:29:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:16,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:16,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:16,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:29:18,279 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_31| (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32))) (not (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_28)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_31| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_31|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32)))))) is different from false [2021-10-13 07:29:18,325 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:18,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 07:29:20,384 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.base_77 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_31| (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_77 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32))) (or (not (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_29)))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_77 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_77) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_77) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_77 v_DerPreprocessor_28))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_31| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_31|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv1 32))) (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_77))))) is different from false [2021-10-13 07:29:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:29:20,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:29:20,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300797999] [2021-10-13 07:29:20,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300797999] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:20,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711189046] [2021-10-13 07:29:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:20,406 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:29:20,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:29:20,410 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:29:20,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 07:29:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:20,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:29:20,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:20,897 INFO L388 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 [2021-10-13 07:29:20,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:29:20,929 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:29:20,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-13 07:29:20,937 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:20,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:29:20,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:20,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 07:29:21,085 INFO L354 Elim1Store]: treesize reduction 118, result has 13.9 percent of original size [2021-10-13 07:29:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 40 [2021-10-13 07:29:21,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:29:21,157 INFO L354 Elim1Store]: treesize reduction 52, result has 37.3 percent of original size [2021-10-13 07:29:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 48 [2021-10-13 07:29:21,865 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-10-13 07:29:21,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 45 [2021-10-13 07:29:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:21,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:21,992 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:21,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 07:29:24,008 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_31 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_34| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_31)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_34| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_34|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv1 32)))) is different from false [2021-10-13 07:29:24,050 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:24,051 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-13 07:29:26,094 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_34| (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_83 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.base_83 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_83))) (not (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_32)))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_83 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_83) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_83 v_DerPreprocessor_31))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_34| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_34|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv1 32))))) is different from false [2021-10-13 07:29:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:29:26,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711189046] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:26,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359057186] [2021-10-13 07:29:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:26,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:29:26,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:29:26,114 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:29:26,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 07:29:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:26,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:29:26,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:26,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:29:26,517 INFO L388 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 [2021-10-13 07:29:26,534 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:26,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:29:26,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:26,590 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-10-13 07:29:26,590 INFO L388 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 2 case distinctions, treesize of input 39 treesize of output 39 [2021-10-13 07:29:26,653 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:29:26,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-13 07:29:26,971 INFO L354 Elim1Store]: treesize reduction 118, result has 13.9 percent of original size [2021-10-13 07:29:26,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 77 [2021-10-13 07:29:26,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:29:27,013 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-10-13 07:29:27,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 73 [2021-10-13 07:29:27,032 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-13 07:29:27,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 65 [2021-10-13 07:29:27,364 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-10-13 07:29:27,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-10-13 07:29:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:27,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:27,451 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:27,451 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-13 07:29:29,497 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_37| (_ BitVec 32)) (v_DerPreprocessor_34 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_37|))) (not (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_34)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_37| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_37|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))))))) is different from false [2021-10-13 07:29:29,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:29,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-13 07:29:31,735 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0.base_89 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_89 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_37| (_ BitVec 32)) (v_DerPreprocessor_35 (_ BitVec 32)) (v_DerPreprocessor_34 (_ BitVec 32))) (or (not (= (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_35)))) (store .cse1 v_ULTIMATE.start_main_~x~0.base_89 (store (store (select .cse1 v_ULTIMATE.start_main_~x~0.base_89) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_89) (_ bv1 32)) v_ULTIMATE.start_main_~x~0.offset_89 v_DerPreprocessor_34))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_37| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_37|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv1 32))) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~x~0.base_89 (_ bv1 1)) |v_ULTIMATE.start_main_#t~malloc7.base_37|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~x~0.base_89)))))) is different from false [2021-10-13 07:29:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-13 07:29:31,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359057186] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:29:31,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:29:31,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 17 [2021-10-13 07:29:31,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185285918] [2021-10-13 07:29:31,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 07:29:31,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:29:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 07:29:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=87, Unknown=6, NotChecked=138, Total=272 [2021-10-13 07:29:31,776 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:36,250 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~head~0.base c_ULTIMATE.start_main_~x~0.base)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)) (_ bv0 32)) (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_31| (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32))) (not (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_28)))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_31| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_31|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32)))))) (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_37| (_ BitVec 32)) (v_DerPreprocessor_34 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_37|))) (not (= (_ bv1 32) (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_34)))) (store .cse1 |v_ULTIMATE.start_main_#t~malloc7.base_37| (store (select .cse1 |v_ULTIMATE.start_main_#t~malloc7.base_37|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))))))) (= c_ULTIMATE.start_main_~head~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv0 32)) (exists ((v_arrayElimCell_148 (_ BitVec 1))) (let ((.cse2 (bvneg (bvneg (bvneg (bvneg v_arrayElimCell_148)))))) (and (= (_ bv0 1) (bvadd .cse2 (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~head~0.base)))))) (= (_ bv0 1) (bvadd .cse2 (_ bv1 1)))))) (forall ((v_DerPreprocessor_31 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~malloc7.base_34| (_ BitVec 32))) (not (= (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) (_ bv1 32)) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_31)))) (store .cse3 |v_ULTIMATE.start_main_#t~malloc7.base_34| (store (select .cse3 |v_ULTIMATE.start_main_#t~malloc7.base_34|) (_ bv4 32) (_ bv2 32)))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32))) (_ bv1 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~x~0.base))) (_ bv1 1)))) is different from false [2021-10-13 07:29:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:29:38,776 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-10-13 07:29:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:29:38,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:29:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:29:38,777 INFO L225 Difference]: With dead ends: 80 [2021-10-13 07:29:38,777 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 07:29:38,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 14745.4ms TimeCoverageRelationStatistics Valid=51, Invalid=102, Unknown=7, NotChecked=182, Total=342 [2021-10-13 07:29:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 07:29:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-10-13 07:29:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 53 states have (on average 1.150943396226415) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-10-13 07:29:38,787 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 18 [2021-10-13 07:29:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:29:38,788 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-10-13 07:29:38,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:29:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-10-13 07:29:38,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:29:38,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:29:38,789 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:29:38,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:39,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:39,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:29:39,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:29:39,418 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-13 07:29:39,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:29:39,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1454377661, now seen corresponding path program 1 times [2021-10-13 07:29:39,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:29:39,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039710186] [2021-10-13 07:29:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:39,419 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:29:39,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:29:39,420 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:29:39,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:29:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 07:29:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:39,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:29:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:39,858 INFO L388 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 35 treesize of output 7 [2021-10-13 07:29:39,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:39,866 INFO L388 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 35 treesize of output 7 [2021-10-13 07:29:39,903 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:29:39,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 07:29:40,650 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-10-13 07:29:40,651 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 227 [2021-10-13 07:29:41,114 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-10-13 07:29:41,114 INFO L388 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 176 [2021-10-13 07:29:41,208 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-13 07:29:41,209 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 221 [2021-10-13 07:29:41,262 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:29:41,263 INFO L388 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 1 case distinctions, treesize of input 190 treesize of output 133 [2021-10-13 07:29:41,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:41,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-10-13 07:29:41,299 INFO L354 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2021-10-13 07:29:41,299 INFO L388 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 1 case distinctions, treesize of input 138 treesize of output 110 [2021-10-13 07:29:41,300 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:29:41,324 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-10-13 07:29:41,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 93 [2021-10-13 07:29:41,759 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:29:41,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2021-10-13 07:29:41,765 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:29:41,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-13 07:29:41,855 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-13 07:29:41,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 25 [2021-10-13 07:29:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:41,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:42,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:42,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 167 [2021-10-13 07:29:42,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:42,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-10-13 07:29:42,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:42,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-10-13 07:29:42,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:42,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1072 treesize of output 1057 [2021-10-13 07:29:42,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:42,331 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1033 [2021-10-13 07:29:42,338 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:42,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1123 [2021-10-13 07:29:50,061 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:50,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 391 [2021-10-13 07:29:50,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11222 treesize of output 11078 [2021-10-13 07:29:50,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:51,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9790 [2021-10-13 07:29:51,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18855 treesize of output 18743 [2021-10-13 07:29:51,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:29:51,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039710186] [2021-10-13 07:29:51,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:29:51,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1307035327] [2021-10-13 07:29:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:29:51,753 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:29:51,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:29:51,754 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:29:51,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-13 07:29:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:29:52,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 07:29:52,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:29:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:29:52,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:52,339 INFO L388 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 35 treesize of output 7 [2021-10-13 07:29:52,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:29:52,352 INFO L388 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 35 treesize of output 7 [2021-10-13 07:29:52,388 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:29:52,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-13 07:29:52,617 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 176 [2021-10-13 07:29:52,919 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:29:52,919 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 141 [2021-10-13 07:29:52,927 INFO L388 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 220 treesize of output 196 [2021-10-13 07:29:52,958 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:29:52,958 INFO L388 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 1 case distinctions, treesize of input 193 treesize of output 136 [2021-10-13 07:29:52,962 INFO L388 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 133 treesize of output 114 [2021-10-13 07:29:52,980 INFO L354 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2021-10-13 07:29:52,981 INFO L388 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 114 treesize of output 105 [2021-10-13 07:29:52,981 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:29:52,998 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-10-13 07:29:52,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 96 [2021-10-13 07:29:53,266 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:29:53,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2021-10-13 07:29:53,273 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:29:53,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-13 07:29:53,347 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-13 07:29:53,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 25 [2021-10-13 07:29:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:29:53,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:29:53,476 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:53,477 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-10-13 07:29:53,489 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:53,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 159 [2021-10-13 07:29:53,493 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:53,494 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-10-13 07:29:53,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1822 treesize of output 1759 [2021-10-13 07:29:53,651 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:53,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2130 [2021-10-13 07:29:53,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:29:53,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2340 [2021-10-13 07:30:12,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:12,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 389 [2021-10-13 07:30:12,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97694 treesize of output 96542 [2021-10-13 07:30:17,424 WARN L207 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 1155 DAG size of output: 1150 [2021-10-13 07:30:18,069 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:19,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94190 [2021-10-13 07:30:19,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96449 treesize of output 96417 [2021-10-13 07:30:21,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:30:21,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033466945] [2021-10-13 07:30:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:30:21,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:30:21,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:30:21,917 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:30:21,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 07:30:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:30:22,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:30:22,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:30:22,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:30:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:30:22,457 INFO L388 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 35 treesize of output 7 [2021-10-13 07:30:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:30:22,466 INFO L388 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 35 treesize of output 7 [2021-10-13 07:30:22,519 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:30:22,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 07:30:22,733 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 178 [2021-10-13 07:30:22,914 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:30:22,915 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 221 treesize of output 143 [2021-10-13 07:30:22,920 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:22,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2021-10-13 07:30:22,979 INFO L354 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2021-10-13 07:30:22,980 INFO L388 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 1 case distinctions, treesize of input 230 treesize of output 202 [2021-10-13 07:30:22,985 INFO L388 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 191 treesize of output 167 [2021-10-13 07:30:23,005 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:30:23,005 INFO L388 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 1 case distinctions, treesize of input 164 treesize of output 107 [2021-10-13 07:30:23,006 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 07:30:23,024 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-10-13 07:30:23,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 98 [2021-10-13 07:30:23,332 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:30:23,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 50 [2021-10-13 07:30:23,338 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:30:23,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2021-10-13 07:30:23,719 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:30:23,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-13 07:30:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:30:23,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:30:23,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:23,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-13 07:30:23,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:23,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-13 07:30:23,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:23,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-10-13 07:30:23,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4948 treesize of output 4564 [2021-10-13 07:30:23,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:23,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3159 [2021-10-13 07:30:23,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:23,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3549 [2021-10-13 07:30:28,043 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc7.base_44| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc7.base_44|))) (and (forall ((v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_56) c_ULTIMATE.start_main_~x~0.offset (_ bv0 32))))) (store .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_44| (store (select .cse0 |v_ULTIMATE.start_main_#t~malloc7.base_44|) (_ bv4 32) v_DerPreprocessor_55))) c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset) c_ULTIMATE.start_main_~x~0.offset)) (or (forall ((v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32))) (not (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_56) c_ULTIMATE.start_main_~x~0.offset (_ bv0 32))))) (store .cse1 |v_ULTIMATE.start_main_#t~malloc7.base_44| (store (select .cse1 |v_ULTIMATE.start_main_#t~malloc7.base_44|) (_ bv4 32) v_DerPreprocessor_55))) c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset) (_ bv0 32)))) (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32))) (not (= |v_ULTIMATE.start_main_#t~malloc7.base_44| (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_53) c_ULTIMATE.start_main_~x~0.offset |v_ULTIMATE.start_main_#t~malloc7.base_44|)))) (store .cse2 |v_ULTIMATE.start_main_#t~malloc7.base_44| (store (select .cse2 |v_ULTIMATE.start_main_#t~malloc7.base_44|) (_ bv4 32) v_DerPreprocessor_52))) c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset))))) (or (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32))) (not (= c_ULTIMATE.start_main_~x~0.base (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_53) c_ULTIMATE.start_main_~x~0.offset |v_ULTIMATE.start_main_#t~malloc7.base_44|)))) (store .cse3 |v_ULTIMATE.start_main_#t~malloc7.base_44| (store (select .cse3 |v_ULTIMATE.start_main_#t~malloc7.base_44|) (_ bv4 32) v_DerPreprocessor_52))) c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset)))) (forall ((v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32))) (not (= (bvadd (_ bv4 32) (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_56) c_ULTIMATE.start_main_~x~0.offset (_ bv0 32))))) (store .cse4 |v_ULTIMATE.start_main_#t~malloc7.base_44| (store (select .cse4 |v_ULTIMATE.start_main_#t~malloc7.base_44|) (_ bv4 32) v_DerPreprocessor_55))) c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset)) c_ULTIMATE.start_main_~x~0.offset)))) (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32))) (= c_ULTIMATE.start_main_~x~0.base (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_53) c_ULTIMATE.start_main_~x~0.offset |v_ULTIMATE.start_main_#t~malloc7.base_44|)))) (store .cse5 |v_ULTIMATE.start_main_#t~malloc7.base_44| (store (select .cse5 |v_ULTIMATE.start_main_#t~malloc7.base_44|) (_ bv4 32) v_DerPreprocessor_52))) c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset)))))) is different from false [2021-10-13 07:30:29,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:29,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 375 [2021-10-13 07:30:29,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3243 treesize of output 3203 [2021-10-13 07:30:29,950 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:30:29,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2992 [2021-10-13 07:30:30,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31849 treesize of output 31497 [2021-10-13 07:30:31,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:30:31,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:30:31,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:30:31,939 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:30:31,939 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:30:31,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:30:31,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:30:31,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:30:31,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:30:31,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:30:31,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:30:31,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:30:32,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-13 07:30:32,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-10-13 07:30:32,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:30:32,566 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:30:32,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:30:32 BoogieIcfgContainer [2021-10-13 07:30:32,579 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:30:32,579 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:30:32,580 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:30:32,580 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:30:32,580 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:26:43" (3/4) ... [2021-10-13 07:30:32,583 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:30:32,584 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:30:32,584 INFO L168 Benchmark]: Toolchain (without parser) took 230711.78 ms. Allocated memory was 60.8 MB in the beginning and 388.0 MB in the end (delta: 327.2 MB). Free memory was 39.6 MB in the beginning and 307.5 MB in the end (delta: -267.9 MB). Peak memory consumption was 58.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,585 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:30:32,585 INFO L168 Benchmark]: CACSL2BoogieTranslator took 530.35 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 36.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,585 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.53 ms. Allocated memory is still 60.8 MB. Free memory was 36.7 MB in the beginning and 34.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,586 INFO L168 Benchmark]: Boogie Preprocessor took 36.11 ms. Allocated memory is still 60.8 MB. Free memory was 34.8 MB in the beginning and 33.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,586 INFO L168 Benchmark]: RCFGBuilder took 639.52 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 32.8 MB in the beginning and 58.7 MB in the end (delta: -25.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,587 INFO L168 Benchmark]: TraceAbstraction took 229448.01 ms. Allocated memory was 83.9 MB in the beginning and 388.0 MB in the end (delta: 304.1 MB). Free memory was 58.0 MB in the beginning and 308.5 MB in the end (delta: -250.5 MB). Peak memory consumption was 238.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,587 INFO L168 Benchmark]: Witness Printer took 4.32 ms. Allocated memory is still 388.0 MB. Free memory was 308.5 MB in the beginning and 307.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:30:32,589 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 530.35 ms. Allocated memory is still 60.8 MB. Free memory was 39.3 MB in the beginning and 36.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.53 ms. Allocated memory is still 60.8 MB. Free memory was 36.7 MB in the beginning and 34.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.11 ms. Allocated memory is still 60.8 MB. Free memory was 34.8 MB in the beginning and 33.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 639.52 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 32.8 MB in the beginning and 58.7 MB in the end (delta: -25.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 229448.01 ms. Allocated memory was 83.9 MB in the beginning and 388.0 MB in the end (delta: 304.1 MB). Free memory was 58.0 MB in the beginning and 308.5 MB in the end (delta: -250.5 MB). Peak memory consumption was 238.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.32 ms. Allocated memory is still 388.0 MB. Free memory was 308.5 MB in the beginning and 307.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1028]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1003] SLL* head = malloc(sizeof(SLL)); [L1004] head->next = ((void*)0) [L1005] head->data = 0 [L1007] SLL* x = head; [L1010] COND TRUE __VERIFIER_nondet_int() [L1013] x->next = malloc(sizeof(SLL)) [L1014] EXPR x->next [L1014] x = x->next [L1015] x->data = 0 [L1016] COND FALSE !(!(((void*)0) != x)) [L1010] COND FALSE !(__VERIFIER_nondet_int()) [L1018] x->data = 1 [L1019] x->next = malloc(sizeof(SLL)) [L1020] EXPR x->next [L1020] x->next->data = 2 [L1022] x = head [L1024] COND FALSE !(!(((void*)0) != x)) [L1026] EXPR x->data [L1026] COND TRUE 1 != x->data [L1028] EXPR x->data [L1028] COND FALSE !(!(0 == x->data)) [L1029] EXPR x->next [L1029] x = x->next [L1026] EXPR x->data [L1026] COND TRUE 1 != x->data [L1028] EXPR x->data [L1028] COND TRUE !(0 == x->data) [L1028] reach_error() - UnprovableResult [Line: 1016]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1031]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 229376.3ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 15.2ms, AutomataDifference: 26891.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 257 SDtfs, 161 SDslu, 985 SDs, 0 SdLazy, 552 SolverSat, 36 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 15913.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 385 GetRequests, 295 SyntacticMatches, 14 SemanticMatches, 76 ConstructedPredicates, 24 IntricatePredicates, 1 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 53888.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=8, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 96.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 88 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 136.0ms SsaConstructionTime, 785.5ms SatisfiabilityAnalysisTime, 143006.9ms InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 362 ConstructedInterpolants, 137 QuantifiedInterpolants, 10065 SizeOfPredicates, 72 NumberOfNonLiveVariables, 879 ConjunctsInSsa, 186 ConjunctsInUnsatCore, 28 InterpolantComputations, 10 PerfectInterpolantSequences, 9/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:30:32,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2cf0760-7464-459f-b1f0-676b1f4591ba/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...