./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:26:16,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:26:16,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:26:16,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:26:16,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:26:16,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:26:16,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:26:16,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:26:16,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:26:16,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:26:16,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:26:16,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:26:16,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:26:16,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:26:16,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:26:16,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:26:16,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:26:16,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:26:16,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:26:16,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:26:16,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:26:16,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:26:16,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:26:16,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:26:16,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:26:16,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:26:16,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:26:16,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:26:16,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:26:16,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:26:16,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:26:16,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:26:16,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:26:16,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:26:16,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:26:16,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:26:16,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:26:16,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:26:16,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:26:16,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:26:16,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:26:16,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:26:16,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:26:16,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:26:16,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:26:16,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:26:16,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:26:16,198 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:26:16,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:26:16,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:26:16,199 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:26:16,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:26:16,199 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:26:16,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:26:16,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:26:16,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:26:16,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:26:16,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:26:16,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:26:16,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:26:16,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:26:16,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:26:16,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:26:16,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:26:16,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:26:16,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:26:16,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:26:16,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:26:16,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:26:16,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:26:16,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:26:16,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:26:16,208 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:26:16,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:26:16,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:26:16,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:26:16,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2021-12-06 18:26:16,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:26:16,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:26:16,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:26:16,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:26:16,388 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:26:16,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-12-06 18:26:16,432 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data/917acabcd/bd94ae1bac444c368b39cd2e555daa7b/FLAG559fe875c [2021-12-06 18:26:16,855 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:26:16,855 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-12-06 18:26:16,864 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data/917acabcd/bd94ae1bac444c368b39cd2e555daa7b/FLAG559fe875c [2021-12-06 18:26:16,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data/917acabcd/bd94ae1bac444c368b39cd2e555daa7b [2021-12-06 18:26:16,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:26:16,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:26:16,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:26:16,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:26:16,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:26:16,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:26:16" (1/1) ... [2021-12-06 18:26:16,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472f0d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:16, skipping insertion in model container [2021-12-06 18:26:16,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:26:16" (1/1) ... [2021-12-06 18:26:16,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:26:16,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:26:17,105 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-12-06 18:26:17,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:26:17,113 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:26:17,154 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-12-06 18:26:17,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:26:17,178 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:26:17,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17 WrapperNode [2021-12-06 18:26:17,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:26:17,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:26:17,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:26:17,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:26:17,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,219 INFO L137 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2021-12-06 18:26:17,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:26:17,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:26:17,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:26:17,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:26:17,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:26:17,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:26:17,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:26:17,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:26:17,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (1/1) ... [2021-12-06 18:26:17,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:26:17,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:17,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:26:17,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:26:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:26:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:26:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-06 18:26:17,313 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-06 18:26:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:26:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:26:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:26:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:26:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:26:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:26:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 18:26:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:26:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:26:17,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:26:17,389 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:26:17,390 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:26:17,548 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:26:17,554 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:26:17,554 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 18:26:17,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:26:17 BoogieIcfgContainer [2021-12-06 18:26:17,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:26:17,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:26:17,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:26:17,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:26:17,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:26:16" (1/3) ... [2021-12-06 18:26:17,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7958b3f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:26:17, skipping insertion in model container [2021-12-06 18:26:17,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:17" (2/3) ... [2021-12-06 18:26:17,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7958b3f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:26:17, skipping insertion in model container [2021-12-06 18:26:17,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:26:17" (3/3) ... [2021-12-06 18:26:17,564 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2021-12-06 18:26:17,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:26:17,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:26:17,605 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:26:17,610 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-06 18:26:17,610 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:26:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:26:17,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:17,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:17,629 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:17,634 INFO L85 PathProgramCache]: Analyzing trace with hash 308507763, now seen corresponding path program 1 times [2021-12-06 18:26:17,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:17,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828189098] [2021-12-06 18:26:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:17,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:17,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 18:26:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:17,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:17,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828189098] [2021-12-06 18:26:17,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828189098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:17,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:17,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:26:17,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917030286] [2021-12-06 18:26:17,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:17,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:26:17,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:17,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:26:17,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:26:17,854 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:26:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:17,908 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2021-12-06 18:26:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:26:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 18:26:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:17,914 INFO L225 Difference]: With dead ends: 57 [2021-12-06 18:26:17,915 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 18:26:17,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:26:17,919 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:17,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:26:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 18:26:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 18:26:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-06 18:26:17,945 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2021-12-06 18:26:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:17,945 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-06 18:26:17,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:26:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-06 18:26:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:26:17,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:17,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:17,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:26:17,947 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2109805219, now seen corresponding path program 1 times [2021-12-06 18:26:17,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580611451] [2021-12-06 18:26:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:17,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:17,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 18:26:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:18,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580611451] [2021-12-06 18:26:18,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580611451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:18,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:18,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:26:18,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694789521] [2021-12-06 18:26:18,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:18,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:26:18,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:26:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:26:18,027 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:26:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:18,072 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-12-06 18:26:18,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:26:18,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 18:26:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:18,073 INFO L225 Difference]: With dead ends: 50 [2021-12-06 18:26:18,073 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:26:18,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:26:18,075 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:18,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 70 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:26:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:26:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-12-06 18:26:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-06 18:26:18,081 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-12-06 18:26:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:18,081 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-06 18:26:18,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:26:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-06 18:26:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 18:26:18,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:18,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:18,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:26:18,083 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash 493100305, now seen corresponding path program 1 times [2021-12-06 18:26:18,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:18,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339042593] [2021-12-06 18:26:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:18,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:18,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:26:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:26:18,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:18,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339042593] [2021-12-06 18:26:18,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339042593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:18,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:18,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:26:18,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380730731] [2021-12-06 18:26:18,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:18,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:26:18,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:18,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:26:18,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:26:18,196 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:18,237 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-12-06 18:26:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:26:18,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-12-06 18:26:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:18,238 INFO L225 Difference]: With dead ends: 55 [2021-12-06 18:26:18,238 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:26:18,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:26:18,240 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:18,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 69 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:26:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:26:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-12-06 18:26:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-06 18:26:18,247 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 27 [2021-12-06 18:26:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:18,247 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-06 18:26:18,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:18,248 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-06 18:26:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 18:26:18,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:18,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:18,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:26:18,249 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:18,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:18,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1095247597, now seen corresponding path program 1 times [2021-12-06 18:26:18,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:18,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683403899] [2021-12-06 18:26:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:18,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:18,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:18,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 18:26:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:26:18,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683403899] [2021-12-06 18:26:18,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683403899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60391161] [2021-12-06 18:26:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:18,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:18,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:18,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:26:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:18,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:26:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:18,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:26:18,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60391161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:26:18,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:26:18,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-12-06 18:26:18,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101487892] [2021-12-06 18:26:18,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:18,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:26:18,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:18,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:26:18,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:26:18,543 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:26:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:18,588 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-12-06 18:26:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:26:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-12-06 18:26:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:18,590 INFO L225 Difference]: With dead ends: 51 [2021-12-06 18:26:18,590 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 18:26:18,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:26:18,592 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:18,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 72 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:26:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 18:26:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-06 18:26:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-06 18:26:18,599 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 27 [2021-12-06 18:26:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:18,599 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-06 18:26:18,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:26:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-06 18:26:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:26:18,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:18,601 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:18,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:26:18,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:18,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash -292922041, now seen corresponding path program 1 times [2021-12-06 18:26:18,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:18,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745550993] [2021-12-06 18:26:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:18,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:19,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:26:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:19,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:26:19,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:19,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745550993] [2021-12-06 18:26:19,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745550993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:19,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:19,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:26:19,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569173881] [2021-12-06 18:26:19,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:19,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:26:19,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:19,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:26:19,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:26:19,049 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:19,146 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-12-06 18:26:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:26:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-06 18:26:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:19,147 INFO L225 Difference]: With dead ends: 45 [2021-12-06 18:26:19,148 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 18:26:19,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:26:19,149 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:19,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 132 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:26:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 18:26:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2021-12-06 18:26:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-06 18:26:19,156 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 37 [2021-12-06 18:26:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:19,157 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-06 18:26:19,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-06 18:26:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:26:19,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:19,158 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:19,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:26:19,159 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash -292920367, now seen corresponding path program 1 times [2021-12-06 18:26:19,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:19,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584489385] [2021-12-06 18:26:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:19,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:19,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:19,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:26:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:19,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:26:19,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:19,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584489385] [2021-12-06 18:26:19,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584489385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:19,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445818396] [2021-12-06 18:26:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:19,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:19,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:19,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:19,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:26:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:19,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 18:26:19,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:19,770 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 17 treesize of output 9 [2021-12-06 18:26:19,817 WARN L860 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (exists ((v_ArrVal_652 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_652) |c_#memory_$Pointer$.base|)))) is different from true [2021-12-06 18:26:19,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:19,860 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 24 treesize of output 24 [2021-12-06 18:26:19,897 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 25 treesize of output 13 [2021-12-06 18:26:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2021-12-06 18:26:19,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:19,985 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_655 (Array Int Int)) (|v_node_create_~temp~0#1.base_13| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_13| v_ArrVal_655) |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (or (<= 1 .cse0) (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_13|) (<= (+ .cse0 1) 0)))) is different from false [2021-12-06 18:26:19,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445818396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:19,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:26:19,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-12-06 18:26:19,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543776192] [2021-12-06 18:26:19,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:19,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:26:19,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:19,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:26:19,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=525, Unknown=2, NotChecked=94, Total=702 [2021-12-06 18:26:19,989 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 19 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:26:20,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:20,279 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-06 18:26:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:26:20,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 19 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-12-06 18:26:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:20,280 INFO L225 Difference]: With dead ends: 39 [2021-12-06 18:26:20,281 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 18:26:20,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=856, Unknown=2, NotChecked=122, Total=1122 [2021-12-06 18:26:20,282 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:20,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 214 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 261 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2021-12-06 18:26:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 18:26:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-06 18:26:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-12-06 18:26:20,286 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2021-12-06 18:26:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:20,286 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-12-06 18:26:20,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 19 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:26:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-12-06 18:26:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 18:26:20,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:20,287 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:20,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:26:20,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 18:26:20,489 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1499731437, now seen corresponding path program 1 times [2021-12-06 18:26:20,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:20,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288988718] [2021-12-06 18:26:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:20,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:20,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:20,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:26:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:20,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:26:20,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:20,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288988718] [2021-12-06 18:26:20,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288988718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:20,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962024885] [2021-12-06 18:26:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:20,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:20,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:20,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:26:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:20,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 18:26:20,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:21,127 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 8 treesize of output 4 [2021-12-06 18:26:21,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:21,190 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 15 treesize of output 17 [2021-12-06 18:26:21,292 INFO L354 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2021-12-06 18:26:21,293 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-06 18:26:21,307 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 18:26:21,307 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 42 [2021-12-06 18:26:21,325 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 9 treesize of output 5 [2021-12-06 18:26:21,333 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 16 treesize of output 8 [2021-12-06 18:26:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:26:21,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:21,525 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| Int) (v_ArrVal_899 (Array Int Int)) (|ULTIMATE.start_dll_append_~last~0#1.offset| Int) (|ULTIMATE.start_dll_append_~last~0#1.base| Int) (v_ArrVal_894 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| v_ArrVal_899))) (let ((.cse0 (select .cse2 |ULTIMATE.start_dll_append_~last~0#1.base|)) (.cse1 (+ |ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16|) (not (= (select .cse0 .cse1) 0)) (not (= (select (select (store (store .cse2 |ULTIMATE.start_dll_append_~last~0#1.base| (store .cse0 .cse1 |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16|)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| v_ArrVal_894) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)))))) is different from false [2021-12-06 18:26:21,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962024885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:21,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:26:21,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2021-12-06 18:26:21,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444937607] [2021-12-06 18:26:21,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:21,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:26:21,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:21,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:26:21,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=4, NotChecked=66, Total=1260 [2021-12-06 18:26:21,528 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 18:26:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:21,991 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-12-06 18:26:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:26:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2021-12-06 18:26:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:21,993 INFO L225 Difference]: With dead ends: 52 [2021-12-06 18:26:21,993 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 18:26:21,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=2106, Unknown=4, NotChecked=94, Total=2450 [2021-12-06 18:26:21,994 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:21,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 205 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 378 Invalid, 0 Unknown, 3 Unchecked, 0.2s Time] [2021-12-06 18:26:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 18:26:21,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-12-06 18:26:21,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-06 18:26:21,999 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 40 [2021-12-06 18:26:21,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:21,999 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-06 18:26:21,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 18:26:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-06 18:26:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 18:26:22,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:22,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:22,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:26:22,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 18:26:22,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1499729763, now seen corresponding path program 1 times [2021-12-06 18:26:22,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:22,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039582663] [2021-12-06 18:26:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:22,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:22,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:22,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:26:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:22,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:26:22,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:22,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039582663] [2021-12-06 18:26:22,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039582663] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:22,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735212781] [2021-12-06 18:26:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:22,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:22,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:22,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:22,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:26:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:23,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 18:26:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:23,347 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:26:23,606 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:26:23,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 18:26:23,656 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:26:23,705 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:26:23,706 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 44 treesize of output 43 [2021-12-06 18:26:23,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:26:23,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 22 [2021-12-06 18:26:23,912 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 7 treesize of output 3 [2021-12-06 18:26:24,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:24,083 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:26:24,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 49 [2021-12-06 18:26:24,096 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:26:24,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-06 18:26:24,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:24,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:26:24,148 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 [2021-12-06 18:26:24,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:26:24,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 15 [2021-12-06 18:26:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:24,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:24,324 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_19| Int) (v_ArrVal_1148 (Array Int Int)) (v_ArrVal_1147 (Array Int Int))) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_19|) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_19| v_ArrVal_1148))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_19| v_ArrVal_1147) |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) 0)) (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_19|) 0)))) is different from false [2021-12-06 18:26:24,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735212781] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:24,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:26:24,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2021-12-06 18:26:24,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441525682] [2021-12-06 18:26:24,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:24,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 18:26:24,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 18:26:24,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2125, Unknown=6, NotChecked=92, Total=2352 [2021-12-06 18:26:24,328 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 46 states, 44 states have (on average 1.5) internal successors, (66), 38 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:26:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:25,678 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-12-06 18:26:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:26:25,679 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.5) internal successors, (66), 38 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2021-12-06 18:26:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:25,680 INFO L225 Difference]: With dead ends: 61 [2021-12-06 18:26:25,680 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 18:26:25,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=295, Invalid=3608, Unknown=7, NotChecked=122, Total=4032 [2021-12-06 18:26:25,682 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:25,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 408 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 634 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2021-12-06 18:26:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 18:26:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-12-06 18:26:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-06 18:26:25,687 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 40 [2021-12-06 18:26:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:25,687 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-06 18:26:25,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.5) internal successors, (66), 38 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:26:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-06 18:26:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 18:26:25,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:25,688 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:25,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 18:26:25,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:25,890 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1422189688, now seen corresponding path program 1 times [2021-12-06 18:26:25,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:25,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045039065] [2021-12-06 18:26:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:25,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:26,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:26,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:26:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:26:26,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:26,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045039065] [2021-12-06 18:26:26,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045039065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:26,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208384932] [2021-12-06 18:26:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:26,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:26,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:26,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:26,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:26:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:27,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-06 18:26:27,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:27,274 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 [2021-12-06 18:26:27,425 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 5 treesize of output 3 [2021-12-06 18:26:27,497 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 11 treesize of output 7 [2021-12-06 18:26:27,559 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:26:27,559 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 17 treesize of output 21 [2021-12-06 18:26:27,624 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 13 treesize of output 9 [2021-12-06 18:26:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:27,629 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 24 treesize of output 20 [2021-12-06 18:26:27,702 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:26:27,702 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 57 treesize of output 54 [2021-12-06 18:26:27,706 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 20 treesize of output 22 [2021-12-06 18:26:27,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:26:27,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 30 [2021-12-06 18:26:27,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:26:27,991 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 7 treesize of output 3 [2021-12-06 18:26:28,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:28,170 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:26:28,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 59 [2021-12-06 18:26:28,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:28,175 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 18 treesize of output 20 [2021-12-06 18:26:28,185 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:26:28,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-06 18:26:28,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:28,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:26:28,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:26:28,574 INFO L354 Elim1Store]: treesize reduction 115, result has 13.5 percent of original size [2021-12-06 18:26:28,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 151 treesize of output 81 [2021-12-06 18:26:28,593 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-12-06 18:26:28,594 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 121 [2021-12-06 18:26:28,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2021-12-06 18:26:28,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:28,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:28,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 43 [2021-12-06 18:26:28,717 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-12-06 18:26:28,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 39 [2021-12-06 18:26:28,721 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 [2021-12-06 18:26:28,761 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 [2021-12-06 18:26:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:28,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:28,808 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int)) (v_ArrVal_1404 (Array Int Int)) (v_ArrVal_1403 (Array Int Int)) (v_ArrVal_1402 (Array Int Int)) (|ULTIMATE.start_dll_append_~last~0#1.offset| Int) (v_ArrVal_1409 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1403) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1402) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (+ |ULTIMATE.start_dll_append_~last~0#1.offset| 4) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1409) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:26:28,822 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int)) (v_ArrVal_1404 (Array Int Int)) (v_ArrVal_1403 (Array Int Int)) (v_ArrVal_1402 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_12| Int) (v_ArrVal_1409 (Array Int Int))) (= (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4)))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1403) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1402) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_12| 4) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1409) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:26:28,834 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int)) (v_ArrVal_1404 (Array Int Int)) (v_ArrVal_1403 (Array Int Int)) (v_ArrVal_1402 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_12| Int) (v_ArrVal_1409 (Array Int Int))) (= (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4)))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1403) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1402) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_12| 4) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1404) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1409) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:26:28,842 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int)) (v_ArrVal_1404 (Array Int Int)) (v_ArrVal_1403 (Array Int Int)) (v_ArrVal_1402 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_12| Int) (v_ArrVal_1409 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4)))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1403) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1402) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_12| 4) |c_ULTIMATE.start_dll_append_#t~ret7#1.base|)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1404) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1409) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 18:26:28,907 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int)) (v_ArrVal_1404 (Array Int Int)) (v_ArrVal_1403 (Array Int Int)) (v_ArrVal_1402 (Array Int Int)) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_23| Int) (v_ArrVal_1420 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_12| Int) (v_ArrVal_1409 (Array Int Int)) (v_ArrVal_1419 (Array Int Int)) (v_ArrVal_1418 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_23|) 0)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_23| v_ArrVal_1420)) (.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_23| v_ArrVal_1419))) (let ((.cse0 (select (select .cse1 (select (select .cse1 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (+ 4 (select (select .cse2 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))) (select (select (store (store (store |c_#memory_int| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_23| v_ArrVal_1418) .cse0 v_ArrVal_1403) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_23| v_ArrVal_1402) (select (select (store (store .cse1 .cse0 (store (select .cse1 .cse0) (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_12| 4) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_23|)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_23| v_ArrVal_1404) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store .cse2 .cse0 v_ArrVal_1409) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_23| v_ArrVal_1406) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_23|))) is different from false [2021-12-06 18:26:28,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208384932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:28,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:26:28,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 49 [2021-12-06 18:26:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602921760] [2021-12-06 18:26:28,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:26:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:26:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2221, Unknown=5, NotChecked=490, Total=2862 [2021-12-06 18:26:28,912 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 49 states, 47 states have (on average 1.425531914893617) internal successors, (67), 40 states have internal predecessors, (67), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:26:29,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:29,812 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-12-06 18:26:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:26:29,813 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.425531914893617) internal successors, (67), 40 states have internal predecessors, (67), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2021-12-06 18:26:29,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:29,813 INFO L225 Difference]: With dead ends: 44 [2021-12-06 18:26:29,813 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 18:26:29,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=270, Invalid=3527, Unknown=5, NotChecked=620, Total=4422 [2021-12-06 18:26:29,815 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:29,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 340 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 701 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2021-12-06 18:26:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 18:26:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-06 18:26:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:29,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-06 18:26:29,820 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 42 [2021-12-06 18:26:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:29,821 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-06 18:26:29,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.425531914893617) internal successors, (67), 40 states have internal predecessors, (67), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:26:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-06 18:26:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:26:29,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:29,821 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:29,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:26:30,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 18:26:30,022 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:30,022 INFO L85 PathProgramCache]: Analyzing trace with hash 924723017, now seen corresponding path program 1 times [2021-12-06 18:26:30,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:30,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381447997] [2021-12-06 18:26:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:30,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:30,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:30,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:26:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:30,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:26:30,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:30,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381447997] [2021-12-06 18:26:30,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381447997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:30,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266917636] [2021-12-06 18:26:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:30,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:30,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:30,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:30,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:26:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:30,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 18:26:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:30,867 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 [2021-12-06 18:26:30,877 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 5 treesize of output 3 [2021-12-06 18:26:30,978 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:26:30,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:26:31,115 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:26:31,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:26:31,209 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-12-06 18:26:31,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-12-06 18:26:31,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:26:31,328 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:26:31,328 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-12-06 18:26:31,576 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:26:31,576 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 67 treesize of output 30 [2021-12-06 18:26:31,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:26:31,586 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:26:31,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 10 [2021-12-06 18:26:31,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:31,725 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:26:31,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 61 [2021-12-06 18:26:31,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:31,735 INFO L354 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-12-06 18:26:31,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 18:26:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:31,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:26:32,043 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-06 18:26:32,044 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 24 treesize of output 26 [2021-12-06 18:26:32,066 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-12-06 18:26:32,067 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 60 [2021-12-06 18:26:32,085 INFO L354 Elim1Store]: treesize reduction 62, result has 24.4 percent of original size [2021-12-06 18:26:32,085 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 102 [2021-12-06 18:26:32,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:32,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:26:32,100 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 38 treesize of output 26 [2021-12-06 18:26:32,146 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 [2021-12-06 18:26:32,215 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:26:32,215 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 56 treesize of output 23 [2021-12-06 18:26:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:26:32,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:32,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266917636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:32,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:26:32,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 49 [2021-12-06 18:26:32,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775832269] [2021-12-06 18:26:32,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:32,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:26:32,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:26:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2884, Unknown=13, NotChecked=0, Total=3080 [2021-12-06 18:26:32,885 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 49 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 40 states have internal predecessors, (70), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:26:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:34,307 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-12-06 18:26:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:26:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 40 states have internal predecessors, (70), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2021-12-06 18:26:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:34,309 INFO L225 Difference]: With dead ends: 49 [2021-12-06 18:26:34,309 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 18:26:34,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=435, Invalid=5404, Unknown=13, NotChecked=0, Total=5852 [2021-12-06 18:26:34,311 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:34,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 329 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 633 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2021-12-06 18:26:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 18:26:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-12-06 18:26:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-06 18:26:34,319 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 44 [2021-12-06 18:26:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:34,319 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-06 18:26:34,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 40 states have internal predecessors, (70), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:26:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-06 18:26:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:26:34,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:34,321 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:34,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 18:26:34,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:34,522 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash 924724691, now seen corresponding path program 1 times [2021-12-06 18:26:34,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302507993] [2021-12-06 18:26:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:34,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:35,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:35,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:26:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:35,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:26:35,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:35,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302507993] [2021-12-06 18:26:35,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302507993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:35,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013202360] [2021-12-06 18:26:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:35,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:35,612 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:35,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:26:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:36,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 175 conjunts are in the unsatisfiable core [2021-12-06 18:26:36,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:36,096 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 [2021-12-06 18:26:36,141 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 5 treesize of output 3 [2021-12-06 18:26:36,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:36,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-06 18:26:36,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:36,302 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 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:26:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:36,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:26:36,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:26:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:36,604 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-06 18:26:36,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-06 18:26:36,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:26:36,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:26:36,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:26:36,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:26:36,813 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:26:36,814 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 98 [2021-12-06 18:26:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:36,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2021-12-06 18:26:36,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 18:26:37,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:26:37,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 47 [2021-12-06 18:26:37,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:37,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-06 18:26:37,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:26:37,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:26:37,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:37,454 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:26:37,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-12-06 18:26:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:37,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 18:26:37,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:37,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:37,482 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:26:37,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 18:26:37,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:37,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 18:26:38,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:26:38,250 INFO L354 Elim1Store]: treesize reduction 157, result has 13.3 percent of original size [2021-12-06 18:26:38,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 276 treesize of output 136 [2021-12-06 18:26:38,278 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-12-06 18:26:38,278 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 370 treesize of output 241 [2021-12-06 18:26:38,306 INFO L354 Elim1Store]: treesize reduction 124, result has 15.1 percent of original size [2021-12-06 18:26:38,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 335 treesize of output 271 [2021-12-06 18:26:38,329 INFO L354 Elim1Store]: treesize reduction 74, result has 21.3 percent of original size [2021-12-06 18:26:38,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 303 treesize of output 291 [2021-12-06 18:26:38,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:38,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 74 [2021-12-06 18:26:38,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-12-06 18:26:38,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:38,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:38,777 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-06 18:26:38,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 256 treesize of output 80 [2021-12-06 18:26:38,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:38,786 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:26:38,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-12-06 18:26:38,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-06 18:26:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:38,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:38,999 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1944 (Array Int Int)) (v_ArrVal_1941 Int) (v_ArrVal_1948 (Array Int Int)) (v_ArrVal_1946 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (let ((.cse4 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1948)) (.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1946))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (+ (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 v_ArrVal_1941)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1944) (select (select .cse1 .cse2) .cse3)) (select (select .cse4 .cse2) .cse3))))))) is different from false [2021-12-06 18:26:39,260 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1944 (Array Int Int)) (v_ArrVal_1941 Int) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_17| Int) (v_ArrVal_1948 (Array Int Int)) (v_ArrVal_1946 (Array Int Int))) (let ((.cse2 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse2))) (let ((.cse0 (select |c_#memory_$Pointer$.base| .cse3)) (.cse1 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_17| 4))) (or (not (= (select .cse0 .cse1) 0)) (< |v_ULTIMATE.start_dll_append_~last~0#1.offset_17| (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse2)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse7 (store (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1948)) (.cse4 (store (store |c_#memory_$Pointer$.base| .cse3 (store .cse0 .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1946))) (let ((.cse5 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (+ (select (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (store (store |c_#memory_int| .cse3 (store (select |c_#memory_int| .cse3) .cse1 v_ArrVal_1941)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1944) (select (select .cse4 .cse5) .cse6)) (select (select .cse7 .cse5) .cse6)))))))))) is different from false [2021-12-06 18:26:39,298 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1944 (Array Int Int)) (v_ArrVal_1941 Int) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_17| Int) (v_ArrVal_1948 (Array Int Int)) (v_ArrVal_1946 (Array Int Int))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse8 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse7) .cse8))) (let ((.cse6 (select |c_#memory_$Pointer$.base| .cse0)) (.cse1 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_17| 4))) (or (= (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1948)) (.cse2 (store (store |c_#memory_$Pointer$.base| .cse0 (store .cse6 .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1946))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (+ (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) .cse1 v_ArrVal_1941)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1944) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))) |c_ULTIMATE.start_main_~data~0#1|) (not (= (select .cse6 .cse1) 0)) (< |v_ULTIMATE.start_dll_append_~last~0#1.offset_17| (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8))))))) is different from false [2021-12-06 18:26:39,577 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1944 (Array Int Int)) (v_ArrVal_1960 (Array Int Int)) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_31| Int) (v_ArrVal_1941 Int) (v_ArrVal_1959 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_17| Int) (v_ArrVal_1948 (Array Int Int)) (v_ArrVal_1958 (Array Int Int)) (v_ArrVal_1946 (Array Int Int))) (let ((.cse9 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_31| v_ArrVal_1959)) (.cse7 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_31| v_ArrVal_1958))) (let ((.cse10 (select (select .cse7 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse11 (+ (select (select .cse9 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (let ((.cse1 (select (select .cse7 .cse10) .cse11))) (let ((.cse8 (select .cse7 .cse1)) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_17| 4))) (or (= (let ((.cse6 (store (store .cse9 .cse1 (store (select .cse9 .cse1) .cse2 0)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_31| v_ArrVal_1948)) (.cse3 (store (store .cse7 .cse1 (store .cse8 .cse2 |v_ULTIMATE.start_dll_append_#t~ret7#1.base_31|)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_31| v_ArrVal_1946))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (+ (select (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (store (let ((.cse0 (store |c_#memory_int| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_31| v_ArrVal_1960))) (store .cse0 .cse1 (store (select .cse0 .cse1) .cse2 v_ArrVal_1941))) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_31| v_ArrVal_1944) (select (select .cse3 .cse4) .cse5)) (select (select .cse6 .cse4) .cse5)))) |c_ULTIMATE.start_main_~data~0#1|) (not (= (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_31|) 0)) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_31|) (< |v_ULTIMATE.start_dll_append_~last~0#1.offset_17| (select (select .cse9 .cse10) .cse11)) (not (= (select .cse8 .cse2) 0)))))))) is different from false [2021-12-06 18:26:39,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013202360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:39,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:26:39,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 55 [2021-12-06 18:26:39,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734398916] [2021-12-06 18:26:39,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:39,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 18:26:39,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 18:26:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3348, Unknown=4, NotChecked=476, Total=4032 [2021-12-06 18:26:39,582 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 55 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 45 states have internal predecessors, (73), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:26:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:41,569 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-12-06 18:26:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:26:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 45 states have internal predecessors, (73), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2021-12-06 18:26:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:41,570 INFO L225 Difference]: With dead ends: 48 [2021-12-06 18:26:41,570 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 18:26:41,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=374, Invalid=5188, Unknown=4, NotChecked=596, Total=6162 [2021-12-06 18:26:41,572 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:41,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 299 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 765 Invalid, 0 Unknown, 69 Unchecked, 0.5s Time] [2021-12-06 18:26:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 18:26:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-06 18:26:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-06 18:26:41,578 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 44 [2021-12-06 18:26:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:41,579 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-06 18:26:41,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 45 states have internal predecessors, (73), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:26:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-06 18:26:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:26:41,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:41,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:41,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 18:26:41,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:41,781 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:41,782 INFO L85 PathProgramCache]: Analyzing trace with hash 478170515, now seen corresponding path program 2 times [2021-12-06 18:26:41,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:41,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470727094] [2021-12-06 18:26:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:41,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:42,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:26:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:42,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:26:43,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:43,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470727094] [2021-12-06 18:26:43,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470727094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:43,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120152019] [2021-12-06 18:26:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:26:43,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:43,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:43,024 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:43,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:26:43,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:26:43,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:26:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 170 conjunts are in the unsatisfiable core [2021-12-06 18:26:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:43,234 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 [2021-12-06 18:26:43,314 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 [2021-12-06 18:26:43,609 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:26:43,610 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 16 treesize of output 22 [2021-12-06 18:26:43,613 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 7 treesize of output 3 [2021-12-06 18:26:43,632 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:26:43,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 18:26:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:43,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:26:43,750 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:26:43,757 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-06 18:26:43,760 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 16 treesize of output 18 [2021-12-06 18:26:43,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:43,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:26:43,873 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:26:43,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 63 [2021-12-06 18:26:43,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:43,878 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 20 treesize of output 22 [2021-12-06 18:26:43,886 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-12-06 18:26:43,886 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 52 treesize of output 50 [2021-12-06 18:26:44,282 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-12-06 18:26:44,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 61 [2021-12-06 18:26:44,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:44,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 18:26:44,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:26:44,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:26:44,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:44,517 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-06 18:26:44,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 98 [2021-12-06 18:26:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:44,524 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 18 treesize of output 20 [2021-12-06 18:26:44,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:44,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:44,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:44,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 54 [2021-12-06 18:26:44,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:44,544 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:26:44,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-12-06 18:26:45,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:26:45,575 INFO L354 Elim1Store]: treesize reduction 337, result has 10.1 percent of original size [2021-12-06 18:26:45,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 13 new quantified variables, introduced 20 case distinctions, treesize of input 350 treesize of output 158 [2021-12-06 18:26:45,597 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 18:26:45,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 41 [2021-12-06 18:26:45,627 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-12-06 18:26:45,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 182 [2021-12-06 18:26:45,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:45,642 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-06 18:26:45,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 84 [2021-12-06 18:26:45,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:45,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:45,663 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-12-06 18:26:45,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 100 [2021-12-06 18:26:45,703 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 45 treesize of output 29 [2021-12-06 18:26:45,735 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 7 treesize of output 3 [2021-12-06 18:26:46,042 INFO L354 Elim1Store]: treesize reduction 37, result has 44.8 percent of original size [2021-12-06 18:26:46,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 177 treesize of output 125 [2021-12-06 18:26:46,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:46,052 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-06 18:26:46,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 66 [2021-12-06 18:26:46,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-06 18:26:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:46,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:46,197 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2219 (Array Int Int)) (v_ArrVal_2226 (Array Int Int)) (v_ArrVal_2222 (Array Int Int)) (v_ArrVal_2230 (Array Int Int))) (= (let ((.cse0 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_2230) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2226) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2219) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2222) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:26:46,442 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2219 (Array Int Int)) (v_ArrVal_2226 (Array Int Int)) (v_ArrVal_2222 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_22| Int) (v_ArrVal_2230 (Array Int Int))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4)))) (let ((.cse0 (select |c_#memory_$Pointer$.base| .cse2)) (.cse1 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_22| 4))) (or (not (= (select .cse0 .cse1) 0)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| .cse2 v_ArrVal_2230) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2226) (select (select (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse0 .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2219) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2222) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2021-12-06 18:26:46,464 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2219 (Array Int Int)) (v_ArrVal_2226 (Array Int Int)) (v_ArrVal_2222 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_22| Int) (v_ArrVal_2230 (Array Int Int))) (let ((.cse0 (let ((.cse3 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse3)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse3) 4))))) (let ((.cse1 (select |c_#memory_$Pointer$.base| .cse0)) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_22| 4))) (or (= (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_2230) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2226) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store .cse1 .cse2 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2219) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse2 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2222) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|) (not (= (select .cse1 .cse2) 0)))))) is different from false [2021-12-06 18:26:46,488 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2219 (Array Int Int)) (v_ArrVal_2226 (Array Int Int)) (v_ArrVal_2222 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_22| Int) (v_ArrVal_2230 (Array Int Int))) (let ((.cse0 (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse4 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (+ (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) 4))))) (let ((.cse1 (select |c_#memory_$Pointer$.base| .cse0)) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_22| 4))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_2230) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2226) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store .cse1 .cse2 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2219) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse2 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2222) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= (select .cse1 .cse2) 0)))))) is different from false [2021-12-06 18:26:46,502 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2219 (Array Int Int)) (v_ArrVal_2226 (Array Int Int)) (v_ArrVal_2222 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_22| Int) (v_ArrVal_2230 (Array Int Int))) (let ((.cse0 (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse4 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (+ (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) 4))))) (let ((.cse1 (select |c_#memory_$Pointer$.base| .cse0)) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_22| 4))) (or (= (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_2230) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_2226) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store .cse1 .cse2 |c_ULTIMATE.start_dll_append_#t~ret7#1.base|)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_2219) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse2 |c_ULTIMATE.start_dll_append_#t~ret7#1.offset|)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_2222) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|) (not (= (select .cse1 .cse2) 0)))))) is different from false [2021-12-06 18:26:46,593 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2219 (Array Int Int)) (v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2226 (Array Int Int)) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| Int) (v_ArrVal_2222 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_22| Int) (v_ArrVal_2241 (Array Int Int)) (v_ArrVal_2230 (Array Int Int)) (v_ArrVal_2240 (Array Int Int))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_2240)) (.cse3 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_2241))) (let ((.cse2 (let ((.cse5 (select (select .cse3 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse6 (+ (select (select .cse4 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (select (select .cse3 (select (select .cse3 .cse5) .cse6)) (+ 4 (select (select .cse4 .cse5) .cse6)))))) (let ((.cse0 (select .cse3 .cse2)) (.cse1 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_22| 4))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35|) 0)) (not (= (select .cse0 .cse1) 0)) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35|) (= (select (select (store (store (store |c_#memory_int| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_2239) .cse2 v_ArrVal_2230) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_2226) (select (select (store (store .cse3 .cse2 (store .cse0 .cse1 |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35|)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_2219) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store .cse4 .cse2 (store (select .cse4 .cse2) .cse1 0)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_2222) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)))))) is different from false [2021-12-06 18:26:46,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120152019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:46,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:26:46,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 55 [2021-12-06 18:26:46,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114188275] [2021-12-06 18:26:46,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:46,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 18:26:46,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:46,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 18:26:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3025, Unknown=7, NotChecked=690, Total=3906 [2021-12-06 18:26:46,598 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 55 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 46 states have internal predecessors, (71), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:26:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:51,014 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2021-12-06 18:26:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 18:26:51,014 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 46 states have internal predecessors, (71), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2021-12-06 18:26:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:51,015 INFO L225 Difference]: With dead ends: 95 [2021-12-06 18:26:51,015 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 18:26:51,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=544, Invalid=8029, Unknown=7, NotChecked=1122, Total=9702 [2021-12-06 18:26:51,018 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 138 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:51,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 286 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1051 Invalid, 0 Unknown, 118 Unchecked, 0.9s Time] [2021-12-06 18:26:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 18:26:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 51. [2021-12-06 18:26:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-12-06 18:26:51,027 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 44 [2021-12-06 18:26:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:51,031 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-12-06 18:26:51,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 46 states have internal predecessors, (71), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:26:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-12-06 18:26:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 18:26:51,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:51,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:51,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 18:26:51,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:51,234 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash -397769244, now seen corresponding path program 2 times [2021-12-06 18:26:51,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:26:51,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565123808] [2021-12-06 18:26:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:51,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:26:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:51,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:26:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:51,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 18:26:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:51,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 18:26:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:26:52,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:26:52,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565123808] [2021-12-06 18:26:52,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565123808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:52,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085504854] [2021-12-06 18:26:52,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:26:52,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:52,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:52,035 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:26:52,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:26:52,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:26:52,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:26:52,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-06 18:26:52,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:52,195 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 [2021-12-06 18:26:52,228 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 5 treesize of output 3 [2021-12-06 18:26:52,339 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 662117 column 46: unknown constant v_old(#valid)_AFTER_CALL_24 [2021-12-06 18:26:52,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:26:52,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-12-06 18:26:52,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598236559] [2021-12-06 18:26:52,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:52,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 18:26:52,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:26:52,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 18:26:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:26:52,340 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 23 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:26:52,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:26:52,341 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:52,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:26:52,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:26:52,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:26:52,544 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@565da8b2 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-12-06 18:26:52,552 INFO L158 Benchmark]: Toolchain (without parser) took 35670.82ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 96.0MB in the beginning and 36.5MB in the end (delta: 59.5MB). Peak memory consumption was 88.4MB. Max. memory is 16.1GB. [2021-12-06 18:26:52,553 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 81.8MB. Free memory is still 56.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:26:52,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 297.14ms. Allocated memory is still 119.5MB. Free memory was 95.7MB in the beginning and 79.0MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-06 18:26:52,554 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.28ms. Allocated memory is still 119.5MB. Free memory was 79.0MB in the beginning and 76.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:26:52,555 INFO L158 Benchmark]: Boogie Preprocessor took 30.55ms. Allocated memory is still 119.5MB. Free memory was 76.8MB in the beginning and 75.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:26:52,556 INFO L158 Benchmark]: RCFGBuilder took 304.63ms. Allocated memory is still 119.5MB. Free memory was 75.1MB in the beginning and 61.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-06 18:26:52,557 INFO L158 Benchmark]: TraceAbstraction took 34992.78ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 60.4MB in the beginning and 36.5MB in the end (delta: 23.9MB). Peak memory consumption was 52.7MB. Max. memory is 16.1GB. [2021-12-06 18:26:52,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 81.8MB. Free memory is still 56.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 297.14ms. Allocated memory is still 119.5MB. Free memory was 95.7MB in the beginning and 79.0MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.28ms. Allocated memory is still 119.5MB. Free memory was 79.0MB in the beginning and 76.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.55ms. Allocated memory is still 119.5MB. Free memory was 76.8MB in the beginning and 75.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 304.63ms. Allocated memory is still 119.5MB. Free memory was 75.1MB in the beginning and 61.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 34992.78ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 60.4MB in the beginning and 36.5MB in the end (delta: 23.9MB). Peak memory consumption was 52.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@565da8b2 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@565da8b2: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-06 18:26:52,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:26:54,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:26:54,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:26:54,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:26:54,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:26:54,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:26:54,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:26:54,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:26:54,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:26:54,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:26:54,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:26:54,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:26:54,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:26:54,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:26:54,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:26:54,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:26:54,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:26:54,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:26:54,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:26:54,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:26:54,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:26:54,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:26:54,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:26:54,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:26:54,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:26:54,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:26:54,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:26:54,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:26:54,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:26:54,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:26:54,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:26:54,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:26:54,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:26:54,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:26:54,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:26:54,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:26:54,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:26:54,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:26:54,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:26:54,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:26:54,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:26:54,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 18:26:54,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:26:54,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:26:54,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:26:54,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:26:54,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:26:54,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:26:54,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:26:54,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:26:54,160 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:26:54,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:26:54,160 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:26:54,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:26:54,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:26:54,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:26:54,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:26:54,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:26:54,161 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:26:54,162 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 18:26:54,162 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 18:26:54,162 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:26:54,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:26:54,162 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:26:54,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:26:54,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:26:54,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:26:54,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:26:54,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:26:54,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:26:54,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:26:54,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:26:54,163 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 18:26:54,163 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 18:26:54,164 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:26:54,164 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:26:54,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:26:54,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:26:54,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 18:26:54,164 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_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2021-12-06 18:26:54,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:26:54,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:26:54,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:26:54,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:26:54,414 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:26:54,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-12-06 18:26:54,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data/f07e9a330/07c52c7e2a5045baae44d80a8ed4648a/FLAGa9b9e7598 [2021-12-06 18:26:54,901 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:26:54,902 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-12-06 18:26:54,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data/f07e9a330/07c52c7e2a5045baae44d80a8ed4648a/FLAGa9b9e7598 [2021-12-06 18:26:54,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/data/f07e9a330/07c52c7e2a5045baae44d80a8ed4648a [2021-12-06 18:26:54,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:26:54,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:26:54,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:26:54,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:26:54,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:26:54,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:26:54" (1/1) ... [2021-12-06 18:26:54,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c438e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:54, skipping insertion in model container [2021-12-06 18:26:54,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:26:54" (1/1) ... [2021-12-06 18:26:54,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:26:54,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:26:55,145 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-12-06 18:26:55,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:26:55,155 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:26:55,186 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-12-06 18:26:55,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:26:55,210 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:26:55,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55 WrapperNode [2021-12-06 18:26:55,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:26:55,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:26:55,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:26:55,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:26:55,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,246 INFO L137 Inliner]: procedures = 130, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 123 [2021-12-06 18:26:55,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:26:55,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:26:55,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:26:55,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:26:55,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:26:55,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:26:55,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:26:55,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:26:55,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (1/1) ... [2021-12-06 18:26:55,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:26:55,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:26:55,299 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:26:55,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:26:55,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 18:26:55,327 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-06 18:26:55,327 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 18:26:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:26:55,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:26:55,410 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:26:55,411 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:26:55,660 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:26:55,665 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:26:55,665 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 18:26:55,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:26:55 BoogieIcfgContainer [2021-12-06 18:26:55,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:26:55,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:26:55,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:26:55,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:26:55,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:26:54" (1/3) ... [2021-12-06 18:26:55,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba7c3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:26:55, skipping insertion in model container [2021-12-06 18:26:55,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:26:55" (2/3) ... [2021-12-06 18:26:55,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba7c3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:26:55, skipping insertion in model container [2021-12-06 18:26:55,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:26:55" (3/3) ... [2021-12-06 18:26:55,672 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2021-12-06 18:26:55,676 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:26:55,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:26:55,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:26:55,717 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-06 18:26:55,717 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:26:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:26:55,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:55,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:55,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash 308507763, now seen corresponding path program 1 times [2021-12-06 18:26:55,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:26:55,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893735827] [2021-12-06 18:26:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:55,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:26:55,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:26:55,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:26:55,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 18:26:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:55,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 18:26:55,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:55,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:26:55,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:26:55,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893735827] [2021-12-06 18:26:55,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893735827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:55,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:55,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:26:55,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197127729] [2021-12-06 18:26:55,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:55,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:26:55,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:26:55,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:26:55,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:26:55,919 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:26:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:55,933 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2021-12-06 18:26:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:26:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 18:26:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:55,939 INFO L225 Difference]: With dead ends: 57 [2021-12-06 18:26:55,939 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 18:26:55,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:26:55,944 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:55,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:26:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 18:26:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 18:26:55,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-06 18:26:55,971 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2021-12-06 18:26:55,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:55,972 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-06 18:26:55,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:26:55,972 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-06 18:26:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:26:55,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:55,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:55,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:26:56,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:26:56,174 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:56,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2109805219, now seen corresponding path program 1 times [2021-12-06 18:26:56,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:26:56,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936179984] [2021-12-06 18:26:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:56,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:26:56,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:26:56,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:26:56,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 18:26:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:26:56,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:56,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:26:56,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:26:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936179984] [2021-12-06 18:26:56,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936179984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:56,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:56,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:26:56,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19032696] [2021-12-06 18:26:56,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:56,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:26:56,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:26:56,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:26:56,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:26:56,304 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:26:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:56,318 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-12-06 18:26:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:26:56,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-06 18:26:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:56,320 INFO L225 Difference]: With dead ends: 50 [2021-12-06 18:26:56,320 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:26:56,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:26:56,322 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:56,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 59 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:26:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:26:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-12-06 18:26:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-06 18:26:56,331 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-12-06 18:26:56,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:56,331 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-06 18:26:56,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:26:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-06 18:26:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 18:26:56,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:56,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:56,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 18:26:56,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:26:56,535 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:56,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:56,537 INFO L85 PathProgramCache]: Analyzing trace with hash 493100305, now seen corresponding path program 1 times [2021-12-06 18:26:56,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:26:56,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390585585] [2021-12-06 18:26:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:56,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:26:56,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:26:56,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:26:56,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 18:26:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:56,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:26:56,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:56,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:26:56,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:26:56,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390585585] [2021-12-06 18:26:56,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390585585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:56,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:56,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:26:56,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146756372] [2021-12-06 18:26:56,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:56,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:26:56,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:26:56,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:26:56,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:26:56,824 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:56,869 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-12-06 18:26:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:26:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-12-06 18:26:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:56,870 INFO L225 Difference]: With dead ends: 55 [2021-12-06 18:26:56,871 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:26:56,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:26:56,872 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:56,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:26:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:26:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-12-06 18:26:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-06 18:26:56,879 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 27 [2021-12-06 18:26:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:56,880 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-06 18:26:56,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-06 18:26:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 18:26:56,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:56,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:56,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 18:26:57,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:26:57,084 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:57,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1095247597, now seen corresponding path program 1 times [2021-12-06 18:26:57,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:26:57,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136675736] [2021-12-06 18:26:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:57,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:26:57,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:26:57,090 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:26:57,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 18:26:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:26:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:26:57,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:26:57,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:26:57,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136675736] [2021-12-06 18:26:57,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136675736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:26:57,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:26:57,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 18:26:57,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536760780] [2021-12-06 18:26:57,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:26:57,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:26:57,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:26:57,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:26:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:26:57,411 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:26:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:57,451 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-12-06 18:26:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:26:57,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-12-06 18:26:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:57,453 INFO L225 Difference]: With dead ends: 55 [2021-12-06 18:26:57,453 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 18:26:57,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:26:57,455 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:57,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 144 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:26:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 18:26:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-12-06 18:26:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-06 18:26:57,461 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 27 [2021-12-06 18:26:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:57,462 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-06 18:26:57,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:26:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-06 18:26:57,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:26:57,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:57,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:57,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 18:26:57,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:26:57,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash -292922041, now seen corresponding path program 1 times [2021-12-06 18:26:57,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:26:57,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058739735] [2021-12-06 18:26:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:57,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:26:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:26:57,671 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:26:57,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 18:26:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:26:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:58,038 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 11 treesize of output 7 [2021-12-06 18:26:58,055 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 16 treesize of output 8 [2021-12-06 18:26:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:26:58,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:26:58,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:26:58,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058739735] [2021-12-06 18:26:58,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058739735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:26:58,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:26:58,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:26:58,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245204778] [2021-12-06 18:26:58,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:26:58,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:26:58,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:26:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:26:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:26:58,073 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:26:58,385 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-12-06 18:26:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:26:58,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-06 18:26:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:26:58,387 INFO L225 Difference]: With dead ends: 45 [2021-12-06 18:26:58,387 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 18:26:58,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:26:58,388 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:26:58,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 150 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:26:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 18:26:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2021-12-06 18:26:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:26:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-06 18:26:58,394 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 37 [2021-12-06 18:26:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:26:58,395 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-06 18:26:58,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:26:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-06 18:26:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:26:58,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:26:58,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:26:58,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 18:26:58,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:26:58,598 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:26:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:26:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash -292920367, now seen corresponding path program 1 times [2021-12-06 18:26:58,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:26:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494165655] [2021-12-06 18:26:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:58,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:26:58,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:26:58,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:26:58,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 18:26:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:58,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:26:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:58,874 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 6 treesize of output 5 [2021-12-06 18:26:58,961 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 8 treesize of output 4 [2021-12-06 18:26:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:26:59,119 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 15 treesize of output 17 [2021-12-06 18:26:59,172 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 16 treesize of output 8 [2021-12-06 18:26:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:26:59,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:26:59,302 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:26:59,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494165655] [2021-12-06 18:26:59,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494165655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:26:59,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1536953673] [2021-12-06 18:26:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:26:59,303 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:26:59,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:26:59,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:26:59,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-12-06 18:26:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:26:59,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:26:59,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:26:59,917 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 8 treesize of output 4 [2021-12-06 18:27:00,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:00,002 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 15 treesize of output 17 [2021-12-06 18:27:00,067 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 16 treesize of output 8 [2021-12-06 18:27:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:27:00,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:00,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1536953673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:00,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:27:00,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-12-06 18:27:00,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465323159] [2021-12-06 18:27:00,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:00,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:27:00,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:27:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:27:00,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=504, Unknown=6, NotChecked=0, Total=600 [2021-12-06 18:27:00,156 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 23 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:27:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:00,725 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-06 18:27:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:27:00,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-12-06 18:27:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:00,727 INFO L225 Difference]: With dead ends: 39 [2021-12-06 18:27:00,727 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 18:27:00,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=723, Unknown=7, NotChecked=0, Total=870 [2021-12-06 18:27:00,728 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:00,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 211 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2021-12-06 18:27:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 18:27:00,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-06 18:27:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:27:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-12-06 18:27:00,732 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2021-12-06 18:27:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:00,732 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-12-06 18:27:00,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 18:27:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-12-06 18:27:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 18:27:00,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:00,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:00,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-12-06 18:27:00,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 18:27:01,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:27:01,135 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:01,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1499731437, now seen corresponding path program 1 times [2021-12-06 18:27:01,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:27:01,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074979886] [2021-12-06 18:27:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:01,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:27:01,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:27:01,137 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:27:01,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 18:27:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:01,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:27:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:01,463 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 6 treesize of output 5 [2021-12-06 18:27:01,582 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 16 treesize of output 8 [2021-12-06 18:27:01,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:01,769 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 22 treesize of output 22 [2021-12-06 18:27:02,162 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-06 18:27:02,162 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-06 18:27:02,212 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 18:27:02,213 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 18:27:02,230 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 19 treesize of output 11 [2021-12-06 18:27:02,382 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 23 treesize of output 11 [2021-12-06 18:27:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:27:02,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:02,517 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_520 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_dll_append_~last~0#1.offset| (_ BitVec 32))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_append_~last~0#1.offset|) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_520) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 18:27:02,540 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_520 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_dll_append_~last~0#1.offset| (_ BitVec 32))) (not (= (select (select (store (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |ULTIMATE.start_dll_append_~last~0#1.offset|) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|))) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_520) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 18:27:02,551 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_520 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_dll_append_~last~0#1.offset| (_ BitVec 32))) (not (= (select (select (store (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |ULTIMATE.start_dll_append_~last~0#1.offset|) |c_ULTIMATE.start_dll_append_#t~ret7#1.base|))) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_520) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 18:27:02,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:27:02,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074979886] [2021-12-06 18:27:02,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074979886] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:02,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1515240859] [2021-12-06 18:27:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:02,748 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:27:02,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:27:02,749 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:27:02,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-12-06 18:27:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:27:03,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:03,867 INFO L354 Elim1Store]: treesize reduction 39, result has 37.1 percent of original size [2021-12-06 18:27:03,867 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 70 [2021-12-06 18:27:03,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:03,877 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 56 treesize of output 54 [2021-12-06 18:27:03,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:03,923 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-12-06 18:27:03,923 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 2 case distinctions, treesize of input 50 treesize of output 68 [2021-12-06 18:27:03,937 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 24 treesize of output 20 [2021-12-06 18:27:04,098 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 25 treesize of output 17 [2021-12-06 18:27:04,102 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 21 treesize of output 13 [2021-12-06 18:27:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:27:04,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:27:04,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1515240859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:04,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:27:04,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [19] total 28 [2021-12-06 18:27:04,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816254901] [2021-12-06 18:27:04,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:04,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:27:04,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:27:04,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:27:04,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=12, NotChecked=180, Total=1122 [2021-12-06 18:27:04,153 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:27:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:04,391 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-12-06 18:27:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:27:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2021-12-06 18:27:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:04,392 INFO L225 Difference]: With dead ends: 42 [2021-12-06 18:27:04,392 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 18:27:04,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=938, Unknown=13, NotChecked=192, Total=1260 [2021-12-06 18:27:04,393 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:04,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2021-12-06 18:27:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 18:27:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-12-06 18:27:04,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:27:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-12-06 18:27:04,398 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 40 [2021-12-06 18:27:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:04,398 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-12-06 18:27:04,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:27:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-12-06 18:27:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 18:27:04,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:04,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:04,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 18:27:04,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-12-06 18:27:04,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:27:04,802 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1499729763, now seen corresponding path program 1 times [2021-12-06 18:27:04,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:27:04,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550384678] [2021-12-06 18:27:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:04,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:27:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:27:04,807 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:27:04,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 18:27:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:05,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:27:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:05,039 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:27:05,284 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:27:05,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 18:27:05,349 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:27:05,425 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:27:05,426 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 52 treesize of output 51 [2021-12-06 18:27:05,723 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 18:27:05,723 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 51 [2021-12-06 18:27:05,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-06 18:27:05,736 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 7 treesize of output 3 [2021-12-06 18:27:05,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:05,951 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:27:05,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 69 [2021-12-06 18:27:05,981 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:27:05,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 50 [2021-12-06 18:27:05,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:05,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:27:06,152 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 [2021-12-06 18:27:06,356 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-06 18:27:06,356 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 60 treesize of output 32 [2021-12-06 18:27:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:06,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:06,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:27:06,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550384678] [2021-12-06 18:27:06,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550384678] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:06,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1130719888] [2021-12-06 18:27:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:06,701 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:27:06,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:27:06,702 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:27:06,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-12-06 18:27:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 18:27:07,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:07,208 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:27:07,755 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:27:07,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 18:27:07,906 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:27:08,069 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:27:08,069 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 53 treesize of output 52 [2021-12-06 18:27:08,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:27:08,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 41 [2021-12-06 18:27:08,717 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 7 treesize of output 3 [2021-12-06 18:27:08,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-12-06 18:27:09,017 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:27:09,018 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 14 treesize of output 20 [2021-12-06 18:27:09,025 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 5 treesize of output 3 [2021-12-06 18:27:09,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:09,056 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:27:09,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 71 [2021-12-06 18:27:09,082 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:27:09,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 49 [2021-12-06 18:27:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:09,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:10,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1130719888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:10,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:27:10,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 42 [2021-12-06 18:27:10,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290419571] [2021-12-06 18:27:10,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:10,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:27:10,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:27:10,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:27:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1785, Unknown=9, NotChecked=0, Total=1980 [2021-12-06 18:27:10,116 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 42 states, 40 states have (on average 1.425) internal successors, (57), 33 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:27:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:12,059 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2021-12-06 18:27:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:27:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.425) internal successors, (57), 33 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2021-12-06 18:27:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:12,062 INFO L225 Difference]: With dead ends: 65 [2021-12-06 18:27:12,062 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 18:27:12,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=288, Invalid=2458, Unknown=10, NotChecked=0, Total=2756 [2021-12-06 18:27:12,063 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:12,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 311 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 232 Invalid, 0 Unknown, 118 Unchecked, 0.8s Time] [2021-12-06 18:27:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 18:27:12,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-12-06 18:27:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:27:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-06 18:27:12,068 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 40 [2021-12-06 18:27:12,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:12,069 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-06 18:27:12,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.425) internal successors, (57), 33 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:27:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-06 18:27:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 18:27:12,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:12,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:12,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 18:27:12,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-12-06 18:27:12,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:27:12,472 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:12,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1422188014, now seen corresponding path program 1 times [2021-12-06 18:27:12,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:27:12,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608265325] [2021-12-06 18:27:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:12,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:27:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:27:12,476 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:27:12,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 18:27:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 18:27:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:12,729 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 [2021-12-06 18:27:12,745 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 12 treesize of output 10 [2021-12-06 18:27:12,828 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:27:12,828 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 [2021-12-06 18:27:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-06 18:27:13,112 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 18:27:13,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 48 [2021-12-06 18:27:13,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:27:13,314 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:27:13,314 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-12-06 18:27:13,816 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:27:13,817 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 81 treesize of output 44 [2021-12-06 18:27:13,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2021-12-06 18:27:13,832 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 7 treesize of output 3 [2021-12-06 18:27:14,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:14,039 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:27:14,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 75 [2021-12-06 18:27:14,066 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-06 18:27:14,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-12-06 18:27:14,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:27:14,453 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 [2021-12-06 18:27:14,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:14,850 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-12-06 18:27:14,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 69 [2021-12-06 18:27:15,044 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:27:15,044 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 72 treesize of output 31 [2021-12-06 18:27:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:27:15,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:15,191 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_947 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_948 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_948) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_947) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 18:27:15,204 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_947 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_948 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|)) v_ArrVal_948) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_947) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 18:27:15,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_947 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_948 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) v_ArrVal_948) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_947) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-06 18:27:15,228 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_947 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_948 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) v_ArrVal_948) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_947) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 18:27:15,441 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:27:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608265325] [2021-12-06 18:27:15,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608265325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [69049598] [2021-12-06 18:27:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:15,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:27:15,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:27:15,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:27:15,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-06 18:27:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:15,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:27:15,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:16,853 INFO L354 Elim1Store]: treesize reduction 58, result has 37.6 percent of original size [2021-12-06 18:27:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 85 [2021-12-06 18:27:16,912 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-06 18:27:16,913 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 36 treesize of output 48 [2021-12-06 18:27:17,039 INFO L354 Elim1Store]: treesize reduction 50, result has 39.0 percent of original size [2021-12-06 18:27:17,039 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 99 [2021-12-06 18:27:17,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:27:17,055 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 28 treesize of output 30 [2021-12-06 18:27:17,836 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 18 treesize of output 10 [2021-12-06 18:27:17,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 18:27:17,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 18:27:18,162 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 7 treesize of output 3 [2021-12-06 18:27:18,243 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 7 treesize of output 3 [2021-12-06 18:27:18,399 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 27 treesize of output 15 [2021-12-06 18:27:18,437 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 33 treesize of output 21 [2021-12-06 18:27:18,452 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 33 treesize of output 21 [2021-12-06 18:27:19,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:27:19,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 244 treesize of output 593 [2021-12-06 18:27:19,841 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 600 treesize of output 588 [2021-12-06 18:28:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 18:28:54,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:54,808 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_append_~last~0#1.offset| (_ BitVec 32))) (or (forall ((v_ArrVal_1051 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1053 (_ BitVec 32))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_append_~last~0#1.offset|) v_ArrVal_1053)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1051) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32)))) (forall ((v_ArrVal_1052 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_append_~last~0#1.offset|) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1052) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32)))))) is different from false [2021-12-06 18:28:54,903 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1052 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1051 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_16| (_ BitVec 32)) (v_ArrVal_1053 (_ BitVec 32)) (|ULTIMATE.start_dll_append_~last~0#1.offset| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_append_~last~0#1.offset|))) (.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~last~0#1.offset_16|))) (or (not (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 v_ArrVal_1053)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1051) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv0 32))) (not (= (_ bv0 32) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1052) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2021-12-06 18:28:56,878 INFO L354 Elim1Store]: treesize reduction 55, result has 48.1 percent of original size [2021-12-06 18:28:56,878 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 102 [2021-12-06 18:28:56,964 INFO L354 Elim1Store]: treesize reduction 17, result has 64.6 percent of original size [2021-12-06 18:28:56,964 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 2 case distinctions, treesize of input 33 treesize of output 49 [2021-12-06 18:28:57,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:57,108 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 75 treesize of output 133 [2021-12-06 18:28:57,121 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 20 treesize of output 18 [2021-12-06 18:28:57,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:28:57,159 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 45 treesize of output 48 [2021-12-06 18:28:57,176 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 20 treesize of output 18 [2021-12-06 18:28:57,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [69049598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:57,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:28:57,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 37 [2021-12-06 18:28:57,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254734769] [2021-12-06 18:28:57,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:57,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 18:28:57,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:28:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 18:28:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1654, Unknown=11, NotChecked=522, Total=2352 [2021-12-06 18:28:57,873 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 37 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 31 states have internal predecessors, (62), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 18:28:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:59,730 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-12-06 18:28:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:28:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 31 states have internal predecessors, (62), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-12-06 18:28:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:59,731 INFO L225 Difference]: With dead ends: 48 [2021-12-06 18:28:59,731 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 18:28:59,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=304, Invalid=3249, Unknown=11, NotChecked=726, Total=4290 [2021-12-06 18:28:59,733 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:59,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 297 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 137 Unchecked, 0.0s Time] [2021-12-06 18:28:59,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 18:28:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-12-06 18:28:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:28:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-12-06 18:28:59,738 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 42 [2021-12-06 18:28:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:59,739 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-12-06 18:28:59,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 31 states have internal predecessors, (62), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 18:28:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-12-06 18:28:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 18:28:59,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:59,740 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:59,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:59,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-12-06 18:29:00,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:29:00,142 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1422189688, now seen corresponding path program 1 times [2021-12-06 18:29:00,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:29:00,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886914073] [2021-12-06 18:29:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:00,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:29:00,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:29:00,146 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:29:00,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 18:29:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:00,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 18:29:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:00,433 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 [2021-12-06 18:29:00,461 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 12 treesize of output 10 [2021-12-06 18:29:00,544 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:29:00,544 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 [2021-12-06 18:29:00,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 18:29:00,864 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 18:29:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 50 [2021-12-06 18:29:00,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:29:01,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:01,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:29:01,123 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:29:01,123 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 59 treesize of output 56 [2021-12-06 18:29:01,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 18:29:01,790 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:29:01,790 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 79 treesize of output 42 [2021-12-06 18:29:01,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:29:01,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-12-06 18:29:01,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:29:02,098 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:02,098 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 14 treesize of output 20 [2021-12-06 18:29:02,103 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 5 treesize of output 3 [2021-12-06 18:29:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:02,138 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:29:02,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 79 [2021-12-06 18:29:02,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:02,152 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 18 treesize of output 20 [2021-12-06 18:29:02,196 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-06 18:29:02,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-12-06 18:29:03,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:03,221 INFO L354 Elim1Store]: treesize reduction 139, result has 14.7 percent of original size [2021-12-06 18:29:03,222 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 90 [2021-12-06 18:29:03,289 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-12-06 18:29:03,290 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 261 treesize of output 160 [2021-12-06 18:29:03,335 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-12-06 18:29:03,336 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 223 treesize of output 213 [2021-12-06 18:29:03,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 59 [2021-12-06 18:29:03,589 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-12-06 18:29:03,589 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 40 [2021-12-06 18:29:03,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-06 18:29:03,743 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 [2021-12-06 18:29:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:03,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:04,024 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1172 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1166 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1168 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1169 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1170 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_dll_append_~last~0#1.offset| (_ BitVec 32))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1168) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1166) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_append_~last~0#1.offset|) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1169) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1170) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1172) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-06 18:29:04,077 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1172 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1166 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1168 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1169 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_20| (_ BitVec 32)) (v_ArrVal_1170 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|)))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1168) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1166) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~last~0#1.offset_20|) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1169) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1170) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1172) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 18:29:04,121 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1172 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1166 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1168 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1169 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_20| (_ BitVec 32)) (v_ArrVal_1170 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1168) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1166) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~last~0#1.offset_20|) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1169) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1170) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1172) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 18:29:04,150 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1172 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1166 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1168 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1169 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_20| (_ BitVec 32)) (v_ArrVal_1170 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1168) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1166) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~last~0#1.offset_20|) |c_ULTIMATE.start_dll_append_#t~ret7#1.base|)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1169) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1170) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1172) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:29:04,562 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:29:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886914073] [2021-12-06 18:29:04,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886914073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [871248627] [2021-12-06 18:29:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:04,562 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:29:04,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:29:04,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:29:04,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-06 18:29:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:05,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 18:29:05,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:05,204 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 [2021-12-06 18:29:05,870 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 9 treesize of output 7 [2021-12-06 18:29:06,311 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:29:06,311 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 [2021-12-06 18:29:06,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:06,539 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 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:29:06,554 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 13 treesize of output 9 [2021-12-06 18:29:06,833 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:29:06,834 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 58 treesize of output 55 [2021-12-06 18:29:06,841 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 20 treesize of output 22 [2021-12-06 18:29:07,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:07,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 42 [2021-12-06 18:29:07,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-06 18:29:07,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:29:07,998 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 7 treesize of output 3 [2021-12-06 18:29:08,276 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:08,276 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 14 treesize of output 20 [2021-12-06 18:29:08,281 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 5 treesize of output 3 [2021-12-06 18:29:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:08,320 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:29:08,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 72 [2021-12-06 18:29:08,348 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:29:08,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2021-12-06 18:29:08,358 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 18 treesize of output 20 [2021-12-06 18:29:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:09,873 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-12-06 18:29:09,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 105 [2021-12-06 18:29:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:09,928 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-06 18:29:09,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 57 [2021-12-06 18:29:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:09,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2021-12-06 18:29:10,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:10,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 29 [2021-12-06 18:29:10,438 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 [2021-12-06 18:29:10,623 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 [2021-12-06 18:29:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:10,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:10,647 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1294 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1295 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1293 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1296 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1297 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1297) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1293) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1296) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1298) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1295) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1294) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-06 18:29:10,689 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1294 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1295 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1293 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1296 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1297 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|)))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1297) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1293) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1296) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1298) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1295) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1294) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 18:29:10,720 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1294 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1295 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1293 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1296 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1297 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1297) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1293) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1296) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1298) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1295) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1294) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2021-12-06 18:29:10,741 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1294 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1295 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1293 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1296 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1297 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_1297) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1293) (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1296) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1298) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1295) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1294) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:29:11,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [871248627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:11,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:29:11,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 49 [2021-12-06 18:29:11,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532952898] [2021-12-06 18:29:11,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:11,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:29:11,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:29:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:29:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2677, Unknown=16, NotChecked=888, Total=3782 [2021-12-06 18:29:11,591 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 49 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 38 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:29:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:15,079 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-12-06 18:29:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:29:15,079 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 38 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2021-12-06 18:29:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:15,080 INFO L225 Difference]: With dead ends: 66 [2021-12-06 18:29:15,080 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 18:29:15,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=335, Invalid=4793, Unknown=16, NotChecked=1176, Total=6320 [2021-12-06 18:29:15,082 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:15,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 343 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2021-12-06 18:29:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 18:29:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-12-06 18:29:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 18:29:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-12-06 18:29:15,090 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 42 [2021-12-06 18:29:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:15,090 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-12-06 18:29:15,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 38 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:29:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-12-06 18:29:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:29:15,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:15,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:15,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 18:29:15,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:15,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:29:15,493 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:15,494 INFO L85 PathProgramCache]: Analyzing trace with hash 924723017, now seen corresponding path program 1 times [2021-12-06 18:29:15,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:29:15,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322107518] [2021-12-06 18:29:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:15,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:29:15,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:29:15,498 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:29:15,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 18:29:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 18:29:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:15,828 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 [2021-12-06 18:29:15,848 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 9 treesize of output 7 [2021-12-06 18:29:15,949 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:29:15,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 18:29:16,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:29:16,266 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 18:29:16,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 58 [2021-12-06 18:29:16,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:29:16,557 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:29:16,557 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 59 treesize of output 56 [2021-12-06 18:29:17,236 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:29:17,237 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 92 treesize of output 51 [2021-12-06 18:29:17,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-12-06 18:29:17,257 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 7 treesize of output 3 [2021-12-06 18:29:17,503 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:17,504 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 14 treesize of output 20 [2021-12-06 18:29:17,511 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 5 treesize of output 3 [2021-12-06 18:29:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:17,535 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:29:17,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 85 [2021-12-06 18:29:17,576 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-06 18:29:17,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 69 [2021-12-06 18:29:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:18,337 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-12-06 18:29:18,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 115 treesize of output 92 [2021-12-06 18:29:18,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:18,379 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-06 18:29:18,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 36 [2021-12-06 18:29:18,569 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 [2021-12-06 18:29:19,093 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:29:19,094 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 80 treesize of output 31 [2021-12-06 18:29:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:19,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:19,329 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1416 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1415 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1415) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1416))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1413) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1414) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2021-12-06 18:29:19,361 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1416 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1415 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|)))) (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1415) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1416))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1413) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1414) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (_ bv0 32)))) is different from false [2021-12-06 18:29:19,387 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1416 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1415 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (let ((.cse1 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))) (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1415) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1416))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1413) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1414) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (_ bv0 32)))) is different from false [2021-12-06 18:29:19,404 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1413 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1416 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1414 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1415 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (let ((.cse1 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))) (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1415) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1416))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1413) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1414) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (_ bv0 32)))) is different from false [2021-12-06 18:29:19,771 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:29:19,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322107518] [2021-12-06 18:29:19,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322107518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:19,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [654329733] [2021-12-06 18:29:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:19,772 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:29:19,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:29:19,772 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:29:19,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-06 18:29:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 18:29:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:20,436 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:29:21,289 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:29:21,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 18:29:21,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:29:21,712 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:29:21,713 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 53 treesize of output 52 [2021-12-06 18:29:22,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:22,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 46 [2021-12-06 18:29:22,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:29:22,731 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 7 treesize of output 3 [2021-12-06 18:29:23,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:23,267 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:29:23,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 76 [2021-12-06 18:29:23,292 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:29:23,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 48 [2021-12-06 18:29:23,346 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:29:23,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:29:23,352 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 5 treesize of output 3 [2021-12-06 18:29:25,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:25,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:25,149 INFO L354 Elim1Store]: treesize reduction 146, result has 19.3 percent of original size [2021-12-06 18:29:25,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 175 treesize of output 98 [2021-12-06 18:29:25,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:25,180 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:29:25,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 127 [2021-12-06 18:29:25,205 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-12-06 18:29:25,205 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 106 [2021-12-06 18:29:25,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:25,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 91 [2021-12-06 18:29:25,728 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 73 treesize of output 53 [2021-12-06 18:29:26,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:26,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 30 [2021-12-06 18:29:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:26,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:26,266 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1530 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1524 (_ BitVec 32)) (v_ArrVal_1526 (_ BitVec 32)) (v_ArrVal_1525 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|))) (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse1 v_ArrVal_1526)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1530))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse1 v_ArrVal_1524)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1525) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2021-12-06 18:29:31,046 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1524 (_ BitVec 32)) (v_ArrVal_1530 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1526 (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_30| (_ BitVec 32)) (v_ArrVal_1525 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|)))) (let ((.cse0 (select |c_#memory_$Pointer$.base| .cse3)) (.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~last~0#1.offset_30|))) (or (not (= (select .cse0 .cse1) (_ bv0 32))) (not (= (select (let ((.cse2 (store (store |c_#memory_$Pointer$.base| .cse3 (store .cse0 .cse1 v_ArrVal_1526)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1530))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) .cse1 v_ArrVal_1524)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1525) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (_ bv0 32))))))) is different from false [2021-12-06 18:29:31,149 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1530 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1524 (_ BitVec 32)) (v_ArrVal_1526 (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_30| (_ BitVec 32)) (v_ArrVal_1525 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))) (let ((.cse0 (select |c_#memory_$Pointer$.base| .cse3)) (.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~last~0#1.offset_30|))) (or (not (= (select .cse0 .cse1) (_ bv0 32))) (not (= (select (let ((.cse2 (store (store |c_#memory_$Pointer$.base| .cse3 (store .cse0 .cse1 v_ArrVal_1526)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1530))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) .cse1 v_ArrVal_1524)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1525) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (_ bv0 32))))))) is different from false [2021-12-06 18:29:31,204 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1530 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1524 (_ BitVec 32)) (v_ArrVal_1526 (_ BitVec 32)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_30| (_ BitVec 32)) (v_ArrVal_1525 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))))) (let ((.cse0 (select |c_#memory_$Pointer$.base| .cse3)) (.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_dll_append_~last~0#1.offset_30|))) (or (not (= (select .cse0 .cse1) (_ bv0 32))) (not (= (select (let ((.cse2 (store (store |c_#memory_$Pointer$.base| .cse3 (store .cse0 .cse1 v_ArrVal_1526)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1530))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse3 (store (select |c_#memory_$Pointer$.offset| .cse3) .cse1 v_ArrVal_1524)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1525) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (_ bv4 32))) (_ bv0 32))))))) is different from false [2021-12-06 18:29:32,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [654329733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:32,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:29:32,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 55 [2021-12-06 18:29:32,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784912355] [2021-12-06 18:29:32,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:32,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 18:29:32,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:29:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 18:29:32,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3388, Unknown=17, NotChecked=1000, Total=4692 [2021-12-06 18:29:32,720 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 55 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 44 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:29:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:36,475 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-06 18:29:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:29:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 44 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2021-12-06 18:29:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:36,476 INFO L225 Difference]: With dead ends: 79 [2021-12-06 18:29:36,476 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 18:29:36,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=490, Invalid=6005, Unknown=17, NotChecked=1320, Total=7832 [2021-12-06 18:29:36,479 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:36,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 325 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 89 Unchecked, 0.0s Time] [2021-12-06 18:29:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 18:29:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-12-06 18:29:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 18:29:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2021-12-06 18:29:36,489 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 44 [2021-12-06 18:29:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:36,489 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2021-12-06 18:29:36,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 44 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:29:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2021-12-06 18:29:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:29:36,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:36,491 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:36,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-12-06 18:29:36,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 18:29:36,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:29:36,893 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash 924724691, now seen corresponding path program 1 times [2021-12-06 18:29:36,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:29:36,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527200857] [2021-12-06 18:29:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:36,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:29:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:29:36,899 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:29:36,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 18:29:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:37,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-06 18:29:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:37,219 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 [2021-12-06 18:29:37,246 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 9 treesize of output 7 [2021-12-06 18:29:37,353 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:29:37,353 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 25 treesize of output 32 [2021-12-06 18:29:37,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:37,425 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 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 18:29:37,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-12-06 18:29:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:29:37,781 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 18:29:37,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2021-12-06 18:29:37,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:29:37,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:29:37,936 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:29:37,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:29:38,117 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:29:38,117 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 95 treesize of output 86 [2021-12-06 18:29:38,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2021-12-06 18:29:38,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 18:29:38,860 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:29:38,860 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 104 treesize of output 59 [2021-12-06 18:29:38,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:29:38,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-12-06 18:29:38,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:29:39,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:39,235 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:29:39,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 90 [2021-12-06 18:29:39,281 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-06 18:29:39,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 61 [2021-12-06 18:29:39,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 18:29:39,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 18:29:40,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:40,525 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-12-06 18:29:40,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 175 [2021-12-06 18:29:40,605 INFO L354 Elim1Store]: treesize reduction 112, result has 16.4 percent of original size [2021-12-06 18:29:40,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 135 treesize of output 100 [2021-12-06 18:29:40,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:40,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 80 [2021-12-06 18:29:40,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:40,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2021-12-06 18:29:40,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 18:29:41,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:41,699 INFO L354 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2021-12-06 18:29:41,699 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 63 [2021-12-06 18:29:41,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2021-12-06 18:29:41,866 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 [2021-12-06 18:29:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:41,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:42,323 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_append_~new_last~0#1.offset| (_ BitVec 32)) (v_ArrVal_1662 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1658 (_ BitVec 32)) (v_ArrVal_1664 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1659 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1656 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|))) (let ((.cse4 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 |ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1659)) (.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1656) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1662))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (bvadd (_ bv4 32) (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 v_ArrVal_1658)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1664) (select (select .cse1 .cse2) .cse3)) (select (select .cse4 .cse2) .cse3))))))) is different from false [2021-12-06 18:29:42,430 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_append_~new_last~0#1.offset| (_ BitVec 32)) (v_ArrVal_1662 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1658 (_ BitVec 32)) (v_ArrVal_1664 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1659 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1656 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse6)) (.cse1 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse6)))) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 |ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1659)) (.cse2 (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1656) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1662))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) .cse1 v_ArrVal_1658)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1664) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))))))) is different from false [2021-12-06 18:29:42,523 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_append_~new_last~0#1.offset| (_ BitVec 32)) (v_ArrVal_1662 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1658 (_ BitVec 32)) (v_ArrVal_1664 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1659 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1656 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse7 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse6) .cse7)) (.cse1 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| .cse6) .cse7)))) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 |ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1659)) (.cse2 (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1656) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1662))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) .cse1 v_ArrVal_1658)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1664) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))))))) is different from false [2021-12-06 18:29:42,617 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_append_~new_last~0#1.offset| (_ BitVec 32)) (v_ArrVal_1662 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1658 (_ BitVec 32)) (v_ArrVal_1664 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1659 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1656 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse7 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse6) .cse7)) (.cse1 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| .cse6) .cse7)))) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) .cse1 |ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1659)) (.cse2 (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1656) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1662))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) .cse1 v_ArrVal_1658)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1664) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))))))) is different from false [2021-12-06 18:29:46,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:29:46,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527200857] [2021-12-06 18:29:46,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527200857] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:46,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [391327797] [2021-12-06 18:29:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:46,081 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:29:46,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:29:46,082 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:29:46,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-06 18:29:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:46,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 18:29:46,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:47,041 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 [2021-12-06 18:29:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:47,581 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 16 treesize of output 17 [2021-12-06 18:29:48,014 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 7 treesize of output 3 [2021-12-06 18:29:48,018 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 10 treesize of output 8 [2021-12-06 18:29:48,631 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:29:48,632 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 [2021-12-06 18:29:48,656 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 14 treesize of output 16 [2021-12-06 18:29:48,931 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 14 treesize of output 16 [2021-12-06 18:29:48,938 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 13 treesize of output 9 [2021-12-06 18:29:48,956 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 13 treesize of output 9 [2021-12-06 18:29:49,277 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:29:49,277 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 94 treesize of output 85 [2021-12-06 18:29:49,284 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 22 treesize of output 24 [2021-12-06 18:29:49,291 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 37 treesize of output 30 [2021-12-06 18:29:50,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:50,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 52 [2021-12-06 18:29:50,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:29:50,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-12-06 18:29:50,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:50,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:29:51,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:51,050 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:29:51,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 83 [2021-12-06 18:29:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:51,063 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 22 treesize of output 24 [2021-12-06 18:29:51,107 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-12-06 18:29:51,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 48 [2021-12-06 18:29:51,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:51,129 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:29:51,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 18:29:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:52,825 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-12-06 18:29:52,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 178 treesize of output 141 [2021-12-06 18:29:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:52,895 INFO L354 Elim1Store]: treesize reduction 66, result has 23.3 percent of original size [2021-12-06 18:29:52,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 96 [2021-12-06 18:29:52,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:52,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:29:52,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2021-12-06 18:29:52,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 18:29:53,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:29:53,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:29:53,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 52 [2021-12-06 18:29:53,957 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-12-06 18:29:53,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2021-12-06 18:29:54,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-06 18:29:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:54,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:54,296 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1793 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1801 (_ BitVec 32)) (v_ArrVal_1797 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1798 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1799 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1800 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse3 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1800) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1793)) (.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1797) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1799))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (_ bv4 32) (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|) v_ArrVal_1801)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1798) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:29:54,357 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1793 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1801 (_ BitVec 32)) (v_ArrVal_1797 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1798 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1799 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1800 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_append_~last~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse1))) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1800) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1793)) (.cse2 (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1797) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1799))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse1)) v_ArrVal_1801)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1798) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:29:54,421 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1793 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1801 (_ BitVec 32)) (v_ArrVal_1797 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1798 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1799 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1800 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse2 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))) (let ((.cse6 (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1800) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1793)) (.cse3 (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1797) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1799))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (bvadd (_ bv4 32) (select (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) v_ArrVal_1801)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1798) (select (select .cse3 .cse4) .cse5)) (select (select .cse6 .cse4) .cse5)))))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2021-12-06 18:29:54,485 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1793 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1801 (_ BitVec 32)) (v_ArrVal_1797 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1798 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1799 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1800 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse2 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse1) .cse2))) (let ((.cse6 (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1800) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1793)) (.cse3 (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1797) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1799))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (bvadd (_ bv4 32) (select (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| .cse0 (store (select |c_#memory_int| .cse0) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) v_ArrVal_1801)) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1798) (select (select .cse3 .cse4) .cse5)) (select (select .cse6 .cse4) .cse5)))))))) is different from false [2021-12-06 18:30:00,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [391327797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:00,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:30:00,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2021-12-06 18:30:00,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169315580] [2021-12-06 18:30:00,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:00,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 18:30:00,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:30:00,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 18:30:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3216, Unknown=19, NotChecked=968, Total=4422 [2021-12-06 18:30:00,692 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 53 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 41 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:30:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:06,325 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-12-06 18:30:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:30:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 41 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2021-12-06 18:30:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:06,327 INFO L225 Difference]: With dead ends: 84 [2021-12-06 18:30:06,327 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 18:30:06,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=358, Invalid=5815, Unknown=21, NotChecked=1288, Total=7482 [2021-12-06 18:30:06,329 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:06,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 333 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2021-12-06 18:30:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 18:30:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-12-06 18:30:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 18:30:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-12-06 18:30:06,340 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 44 [2021-12-06 18:30:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:06,340 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-12-06 18:30:06,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 41 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:30:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-12-06 18:30:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:30:06,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:06,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:06,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 18:30:06,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-06 18:30:06,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:30:06,743 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash 478168841, now seen corresponding path program 2 times [2021-12-06 18:30:06,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:30:06,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436279436] [2021-12-06 18:30:06,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:30:06,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:30:06,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:30:06,748 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:30:06,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c10fb47b-3b6b-4d22-9ad4-5f57a54df5fc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 18:30:06,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:30:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:30:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:07,377 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-06 18:30:07,377 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 34 treesize of output 46 [2021-12-06 18:30:07,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:30:07,391 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 24 treesize of output 26 [2021-12-06 18:30:07,431 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-06 18:30:07,431 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 30 treesize of output 42 [2021-12-06 18:30:07,488 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-06 18:30:07,489 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 57 [2021-12-06 18:30:07,612 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 16 treesize of output 8