./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0236.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0236.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:06:42,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:06:42,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:06:42,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:06:42,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:06:42,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:06:42,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:06:42,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:06:42,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:06:42,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:06:42,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:06:42,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:06:42,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:06:42,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:06:42,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:06:42,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:06:42,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:06:42,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:06:42,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:06:42,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:06:42,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:06:42,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:06:42,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:06:42,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:06:42,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:06:42,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:06:42,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:06:42,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:06:42,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:06:42,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:06:42,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:06:42,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:06:42,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:06:42,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:06:42,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:06:42,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:06:42,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:06:42,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:06:42,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:06:42,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:06:42,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:06:42,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 09:06:42,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:06:42,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:06:42,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:06:42,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:06:42,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:06:42,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:06:42,164 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:06:42,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:06:42,164 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:06:42,164 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:06:42,164 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:06:42,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:06:42,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:06:42,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:06:42,165 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:06:42,165 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:06:42,165 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:06:42,165 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:06:42,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:06:42,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:06:42,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:06:42,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:06:42,166 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:06:42,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:06:42,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:06:42,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:06:42,167 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:06:42,167 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:06:42,167 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:06:42,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:06:42,167 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:06:42,167 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:06:42,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:06:42,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:06:42,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:06:42,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:06:42,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:06:42,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:06:42,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:06:42,168 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:06:42,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:06:42,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:06:42,169 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_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9284cc089e563ce2bdd0201592786c36b8d718b3efb8766c887a82d2ff3babc3 [2022-12-14 09:06:42,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:06:42,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:06:42,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:06:42,375 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:06:42,375 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:06:42,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/memsafety/test-0236.i [2022-12-14 09:06:44,871 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:06:45,073 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:06:45,073 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/sv-benchmarks/c/memsafety/test-0236.i [2022-12-14 09:06:45,083 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/data/7ed95c519/6534c46a9aa34c229c045477e7a02831/FLAGd61045bbd [2022-12-14 09:06:45,425 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/data/7ed95c519/6534c46a9aa34c229c045477e7a02831 [2022-12-14 09:06:45,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:06:45,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:06:45,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:06:45,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:06:45,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:06:45,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44777581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45, skipping insertion in model container [2022-12-14 09:06:45,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:06:45,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:06:45,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:06:45,675 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:06:45,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:06:45,727 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:06:45,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45 WrapperNode [2022-12-14 09:06:45,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:06:45,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:06:45,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:06:45,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:06:45,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,760 INFO L138 Inliner]: procedures = 188, calls = 67, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 211 [2022-12-14 09:06:45,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:06:45,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:06:45,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:06:45,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:06:45,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,780 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:06:45,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:06:45,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:06:45,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:06:45,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (1/1) ... [2022-12-14 09:06:45,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:06:45,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:45,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:06:45,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:06:45,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:06:45,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:06:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 09:06:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 09:06:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-12-14 09:06:45,838 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-12-14 09:06:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:06:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 09:06:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:06:45,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:06:45,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:06:45,939 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:06:45,941 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:06:46,341 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:06:46,399 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:06:46,399 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-14 09:06:46,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:06:46 BoogieIcfgContainer [2022-12-14 09:06:46,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:06:46,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:06:46,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:06:46,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:06:46,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:06:45" (1/3) ... [2022-12-14 09:06:46,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e560eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:06:46, skipping insertion in model container [2022-12-14 09:06:46,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:06:45" (2/3) ... [2022-12-14 09:06:46,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e560eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:06:46, skipping insertion in model container [2022-12-14 09:06:46,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:06:46" (3/3) ... [2022-12-14 09:06:46,410 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0236.i [2022-12-14 09:06:46,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:06:46,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 89 error locations. [2022-12-14 09:06:46,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:06:46,471 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33ca817a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:06:46,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2022-12-14 09:06:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 180 states, 83 states have (on average 2.325301204819277) internal successors, (193), 172 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 09:06:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:06:46,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:46,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:06:46,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:06:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash 378247, now seen corresponding path program 1 times [2022-12-14 09:06:46,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:46,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310003472] [2022-12-14 09:06:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:46,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:06:46,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:46,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310003472] [2022-12-14 09:06:46,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310003472] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:06:46,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:06:46,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:06:46,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13179074] [2022-12-14 09:06:46,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:46,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 09:06:46,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:46,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 09:06:46,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:06:46,634 INFO L87 Difference]: Start difference. First operand has 180 states, 83 states have (on average 2.325301204819277) internal successors, (193), 172 states have internal predecessors, (193), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:46,704 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2022-12-14 09:06:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 09:06:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 09:06:46,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:46,714 INFO L225 Difference]: With dead ends: 180 [2022-12-14 09:06:46,714 INFO L226 Difference]: Without dead ends: 179 [2022-12-14 09:06:46,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:06:46,718 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:46,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 170 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:06:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-14 09:06:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-12-14 09:06:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 171 states have internal predecessors, (182), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 09:06:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2022-12-14 09:06:46,759 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 3 [2022-12-14 09:06:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:46,759 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2022-12-14 09:06:46,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2022-12-14 09:06:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:06:46,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:46,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:06:46,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:06:46,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:06:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:46,761 INFO L85 PathProgramCache]: Analyzing trace with hash 358839889, now seen corresponding path program 1 times [2022-12-14 09:06:46,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:46,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766428698] [2022-12-14 09:06:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:46,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:46,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:06:46,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783930774] [2022-12-14 09:06:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:46,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:46,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:46,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:46,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:06:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:06:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:46,912 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:06:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:06:46,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:06:46,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:46,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766428698] [2022-12-14 09:06:46,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:06:46,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783930774] [2022-12-14 09:06:46,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783930774] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:06:46,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:06:46,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:06:46,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633375208] [2022-12-14 09:06:46,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:46,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:06:46,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:06:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:06:46,926 INFO L87 Difference]: Start difference. First operand 179 states and 194 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:47,070 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2022-12-14 09:06:47,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:06:47,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 09:06:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:47,072 INFO L225 Difference]: With dead ends: 178 [2022-12-14 09:06:47,072 INFO L226 Difference]: Without dead ends: 178 [2022-12-14 09:06:47,072 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:06:47,073 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 5 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:47,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 264 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:06:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-14 09:06:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-12-14 09:06:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 83 states have (on average 2.180722891566265) internal successors, (181), 170 states have internal predecessors, (181), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 09:06:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2022-12-14 09:06:47,084 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 5 [2022-12-14 09:06:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:47,084 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2022-12-14 09:06:47,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2022-12-14 09:06:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:06:47,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:47,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:06:47,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:06:47,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:47,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:06:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:47,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1760864977, now seen corresponding path program 1 times [2022-12-14 09:06:47,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:47,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351981686] [2022-12-14 09:06:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:47,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:47,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:06:47,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227961130] [2022-12-14 09:06:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:47,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:47,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:47,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:47,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:06:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:06:47,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:47,440 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:06:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:06:47,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:06:47,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:47,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351981686] [2022-12-14 09:06:47,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:06:47,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227961130] [2022-12-14 09:06:47,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227961130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:06:47,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:06:47,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:06:47,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540613922] [2022-12-14 09:06:47,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:47,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:06:47,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:47,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:06:47,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:06:47,466 INFO L87 Difference]: Start difference. First operand 178 states and 193 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:47,619 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2022-12-14 09:06:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:06:47,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:06:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:47,621 INFO L225 Difference]: With dead ends: 183 [2022-12-14 09:06:47,621 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 09:06:47,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:06:47,622 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 8 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:47,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 430 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:06:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 09:06:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-12-14 09:06:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 87 states have (on average 2.1379310344827585) internal successors, (186), 174 states have internal predecessors, (186), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 09:06:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 198 transitions. [2022-12-14 09:06:47,629 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 198 transitions. Word has length 6 [2022-12-14 09:06:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:47,630 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 198 transitions. [2022-12-14 09:06:47,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 198 transitions. [2022-12-14 09:06:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 09:06:47,631 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:47,631 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:47,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:06:47,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:47,833 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:06:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:47,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2018843385, now seen corresponding path program 1 times [2022-12-14 09:06:47,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:47,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569055886] [2022-12-14 09:06:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:47,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:47,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:06:47,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757469426] [2022-12-14 09:06:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:47,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:47,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:47,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:47,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:06:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:06:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:48,167 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:06:48,248 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-12-14 09:06:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 09:06:49,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:06:49,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:49,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569055886] [2022-12-14 09:06:49,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:06:49,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757469426] [2022-12-14 09:06:49,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757469426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:06:49,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:06:49,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:06:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949884149] [2022-12-14 09:06:49,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:49,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:06:49,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:49,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:06:49,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:06:49,137 INFO L87 Difference]: Start difference. First operand 183 states and 198 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:06:53,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:06:55,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:06:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:55,948 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2022-12-14 09:06:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:06:55,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-12-14 09:06:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:55,949 INFO L225 Difference]: With dead ends: 187 [2022-12-14 09:06:55,949 INFO L226 Difference]: Without dead ends: 185 [2022-12-14 09:06:55,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:06:55,950 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 7 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:55,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 569 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 195 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 09:06:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-14 09:06:55,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-12-14 09:06:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 89 states have (on average 2.1123595505617976) internal successors, (188), 176 states have internal predecessors, (188), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 09:06:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2022-12-14 09:06:55,955 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 45 [2022-12-14 09:06:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:55,955 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2022-12-14 09:06:55,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:06:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2022-12-14 09:06:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 09:06:55,956 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:55,956 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:55,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:06:56,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:56,158 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:06:56,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2023413647, now seen corresponding path program 1 times [2022-12-14 09:06:56,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:56,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924523433] [2022-12-14 09:06:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:56,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:56,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:06:56,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125945197] [2022-12-14 09:06:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:56,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:56,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:56,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:56,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:06:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 09:06:56,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:56,437 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:06:56,462 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-12-14 09:06:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 64 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 09:06:56,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 09:06:56,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:56,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924523433] [2022-12-14 09:06:56,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:06:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125945197] [2022-12-14 09:06:56,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125945197] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:06:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763215968] [2022-12-14 09:06:56,746 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 09:06:56,747 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:06:56,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:06:56,754 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:06:56,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:06:56,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:06:56,816 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:06:56,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:06:56,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:06:56,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:06:56,941 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:06:56,942 INFO L350 Elim1Store]: Elim1 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 182 treesize of output 185 [2022-12-14 09:06:56,971 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:06:56,972 INFO L350 Elim1Store]: Elim1 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 180 treesize of output 183 [2022-12-14 09:06:57,000 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:06:57,000 INFO L350 Elim1Store]: Elim1 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 174 treesize of output 177 [2022-12-14 09:06:57,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:06:57,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:06:57,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:06:57,190 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:06:57,196 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:06:57,229 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:06:57,239 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:06:58,072 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:06:58,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:06:58,144 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:06:58,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:06:58,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:06:58,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:06:58,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:06:58,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:06:58,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:06:58,375 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:07:01,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [763215968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:01,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:07:01,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6] total 31 [2022-12-14 09:07:01,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183658626] [2022-12-14 09:07:01,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:01,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:07:01,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:07:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-12-14 09:07:01,839 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 09:07:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:03,734 INFO L93 Difference]: Finished difference Result 373 states and 403 transitions. [2022-12-14 09:07:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 09:07:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2022-12-14 09:07:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:03,736 INFO L225 Difference]: With dead ends: 373 [2022-12-14 09:07:03,736 INFO L226 Difference]: Without dead ends: 373 [2022-12-14 09:07:03,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 09:07:03,737 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 331 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:03,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 1055 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 09:07:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-12-14 09:07:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 236. [2022-12-14 09:07:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 132 states have (on average 2.0833333333333335) internal successors, (275), 219 states have internal predecessors, (275), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:07:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-12-14 09:07:03,745 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 50 [2022-12-14 09:07:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:03,745 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-12-14 09:07:03,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 09:07:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-12-14 09:07:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 09:07:03,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:03,746 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:03,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:07:03,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:03,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:07:03,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:03,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2022598511, now seen corresponding path program 1 times [2022-12-14 09:07:03,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:03,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299360439] [2022-12-14 09:07:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:03,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:03,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:07:03,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997250721] [2022-12-14 09:07:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:03,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:03,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:03,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:03,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:07:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:04,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:07:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:04,152 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_219 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_219))) is different from true [2022-12-14 09:07:04,197 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:07:04,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-12-14 09:07:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 1 not checked. [2022-12-14 09:07:04,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:04,359 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:07:04,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-12-14 09:07:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 09:07:04,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:04,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299360439] [2022-12-14 09:07:04,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:07:04,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997250721] [2022-12-14 09:07:04,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997250721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:07:04,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256988650] [2022-12-14 09:07:04,376 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 09:07:04,376 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:07:04,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:07:04,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:07:04,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:07:04,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:07:04,403 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:07:04,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:04,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:04,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:04,490 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:07:04,502 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:07:04,515 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:07:04,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:04,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:04,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:04,614 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:04,618 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:04,644 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:04,662 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:05,627 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:07:05,667 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:07:05,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:07:05,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:05,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:05,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:05,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:05,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:05,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:05,890 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:07:10,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3083#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:07:10,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:07:10,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:07:10,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-12-14 09:07:10,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136812548] [2022-12-14 09:07:10,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:07:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 09:07:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 09:07:10,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=907, Unknown=1, NotChecked=62, Total=1122 [2022-12-14 09:07:10,597 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:07:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:11,024 INFO L93 Difference]: Finished difference Result 265 states and 327 transitions. [2022-12-14 09:07:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:07:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2022-12-14 09:07:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:11,027 INFO L225 Difference]: With dead ends: 265 [2022-12-14 09:07:11,027 INFO L226 Difference]: Without dead ends: 265 [2022-12-14 09:07:11,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=182, Invalid=1153, Unknown=1, NotChecked=70, Total=1406 [2022-12-14 09:07:11,030 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 115 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:11,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 719 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 617 Invalid, 0 Unknown, 213 Unchecked, 0.3s Time] [2022-12-14 09:07:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-12-14 09:07:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 232. [2022-12-14 09:07:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 2.022727272727273) internal successors, (267), 215 states have internal predecessors, (267), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:07:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 291 transitions. [2022-12-14 09:07:11,038 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 291 transitions. Word has length 54 [2022-12-14 09:07:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:11,038 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 291 transitions. [2022-12-14 09:07:11,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:07:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 291 transitions. [2022-12-14 09:07:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 09:07:11,039 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:11,039 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:11,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:07:11,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 09:07:11,241 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:07:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:11,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2022598510, now seen corresponding path program 1 times [2022-12-14 09:07:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:11,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170052402] [2022-12-14 09:07:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:11,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:11,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:07:11,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898000135] [2022-12-14 09:07:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:11,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:11,304 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:11,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:07:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:07:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:11,556 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:11,590 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-12-14 09:07:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 09:07:11,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 09:07:12,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:12,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170052402] [2022-12-14 09:07:12,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:07:12,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898000135] [2022-12-14 09:07:12,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898000135] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:07:12,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1089961092] [2022-12-14 09:07:12,319 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 09:07:12,319 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:07:12,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:07:12,319 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:07:12,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:07:12,339 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:07:12,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:07:12,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:07:12,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:07:12,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:07:12,549 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:07:12,550 INFO L350 Elim1Store]: Elim1 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 182 treesize of output 185 [2022-12-14 09:07:12,575 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:07:12,575 INFO L350 Elim1Store]: Elim1 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 178 treesize of output 181 [2022-12-14 09:07:12,599 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:07:12,599 INFO L350 Elim1Store]: Elim1 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 176 treesize of output 179 [2022-12-14 09:07:12,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:12,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:12,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:12,681 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:12,688 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:12,707 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:12,715 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:13,432 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:07:13,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:07:13,480 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:07:13,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:13,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:13,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:13,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:13,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:13,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:13,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:07:18,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3940#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:07:18,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:07:18,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:07:18,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-14 09:07:18,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781600686] [2022-12-14 09:07:18,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:07:18,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:07:18,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:07:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-12-14 09:07:18,724 INFO L87 Difference]: Start difference. First operand 232 states and 291 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 09:07:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:20,522 INFO L93 Difference]: Finished difference Result 252 states and 315 transitions. [2022-12-14 09:07:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:07:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 54 [2022-12-14 09:07:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:20,524 INFO L225 Difference]: With dead ends: 252 [2022-12-14 09:07:20,524 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 09:07:20,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 09:07:20,524 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 18 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:20,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 849 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:07:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 09:07:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-12-14 09:07:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 144 states have (on average 1.9375) internal successors, (279), 227 states have internal predecessors, (279), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:07:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 303 transitions. [2022-12-14 09:07:20,529 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 303 transitions. Word has length 54 [2022-12-14 09:07:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:20,529 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 303 transitions. [2022-12-14 09:07:20,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 09:07:20,530 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 303 transitions. [2022-12-14 09:07:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 09:07:20,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:20,531 INFO L195 NwaCegarLoop]: trace histogram [24, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:20,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:07:20,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:20,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:07:20,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash 280114206, now seen corresponding path program 2 times [2022-12-14 09:07:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:20,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785979432] [2022-12-14 09:07:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:20,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:20,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:07:20,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169136065] [2022-12-14 09:07:20,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:07:20,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:20,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:20,815 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:20,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:07:21,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:07:21,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:07:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:07:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:21,254 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:21,275 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 16 [2022-12-14 09:07:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 140 proven. 10 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-12-14 09:07:21,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 140 proven. 10 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-12-14 09:07:21,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:21,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785979432] [2022-12-14 09:07:21,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:07:21,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169136065] [2022-12-14 09:07:21,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169136065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:07:21,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1316943310] [2022-12-14 09:07:21,565 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 09:07:21,565 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:07:21,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:07:21,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:07:21,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:07:21,583 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:07:21,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:07:21,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:21,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:21,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:21,676 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:07:21,685 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:07:21,693 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:07:21,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:21,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:21,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:21,756 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:21,760 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:21,794 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:21,798 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:22,677 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:07:22,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:07:22,732 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:07:22,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:22,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:22,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:22,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:22,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:22,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:22,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:07:27,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4912#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:07:27,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:07:27,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:07:27,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-12-14 09:07:27,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126538910] [2022-12-14 09:07:27,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:07:27,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 09:07:27,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 09:07:27,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 09:07:27,182 INFO L87 Difference]: Start difference. First operand 244 states and 303 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 09:07:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:28,507 INFO L93 Difference]: Finished difference Result 264 states and 331 transitions. [2022-12-14 09:07:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 09:07:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 72 [2022-12-14 09:07:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:28,508 INFO L225 Difference]: With dead ends: 264 [2022-12-14 09:07:28,508 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 09:07:28,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 172 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=446, Invalid=2524, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 09:07:28,509 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 40 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:28,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1394 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:07:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 09:07:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-12-14 09:07:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 158 states have (on average 1.8544303797468353) internal successors, (293), 241 states have internal predecessors, (293), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:07:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 317 transitions. [2022-12-14 09:07:28,513 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 317 transitions. Word has length 72 [2022-12-14 09:07:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:28,514 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 317 transitions. [2022-12-14 09:07:28,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 16 states have internal predecessors, (33), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 09:07:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 317 transitions. [2022-12-14 09:07:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 09:07:28,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:28,515 INFO L195 NwaCegarLoop]: trace histogram [35, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:28,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:07:28,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:28,715 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:07:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:28,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1473855924, now seen corresponding path program 3 times [2022-12-14 09:07:28,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:28,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565835273] [2022-12-14 09:07:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:28,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:28,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:07:28,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514043220] [2022-12-14 09:07:28,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:07:28,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:28,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:28,746 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:28,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:07:29,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:07:29,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:07:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 09:07:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:29,723 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:29,737 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-12-14 09:07:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 345 proven. 55 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-12-14 09:07:29,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 345 proven. 55 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-12-14 09:07:30,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:30,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565835273] [2022-12-14 09:07:30,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:07:30,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514043220] [2022-12-14 09:07:30,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514043220] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:07:30,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666936024] [2022-12-14 09:07:30,516 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 09:07:30,516 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:07:30,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:07:30,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:07:30,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:07:30,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:07:30,541 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:07:30,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:30,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:30,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:30,655 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:07:30,665 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:07:30,673 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:07:30,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:30,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:30,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:30,755 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:30,758 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:30,794 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:30,798 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:07:31,663 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:07:31,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:07:31,725 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:07:31,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:07:31,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:07:31,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:07:31,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:31,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:07:31,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:07:31,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:07:37,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6010#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:07:37,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:07:37,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:07:37,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-12-14 09:07:37,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222268383] [2022-12-14 09:07:37,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:07:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 09:07:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 09:07:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2111, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 09:07:37,367 INFO L87 Difference]: Start difference. First operand 258 states and 317 transitions. Second operand has 28 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 28 states have internal predecessors, (45), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 09:07:52,579 WARN L233 SmtUtils]: Spent 13.66s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:07:58,945 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:08:05,269 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:08:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:10,698 INFO L93 Difference]: Finished difference Result 310 states and 389 transitions. [2022-12-14 09:08:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 09:08:10,699 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 28 states have internal predecessors, (45), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 83 [2022-12-14 09:08:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:10,700 INFO L225 Difference]: With dead ends: 310 [2022-12-14 09:08:10,700 INFO L226 Difference]: Without dead ends: 294 [2022-12-14 09:08:10,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 193 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=1350, Invalid=6660, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 09:08:10,701 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 99 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:10,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 2032 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 09:08:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-12-14 09:08:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-12-14 09:08:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 194 states have (on average 1.6958762886597938) internal successors, (329), 277 states have internal predecessors, (329), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:08:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 353 transitions. [2022-12-14 09:08:10,706 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 353 transitions. Word has length 83 [2022-12-14 09:08:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:10,706 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 353 transitions. [2022-12-14 09:08:10,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 28 states have internal predecessors, (45), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 09:08:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 353 transitions. [2022-12-14 09:08:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 09:08:10,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:10,707 INFO L195 NwaCegarLoop]: trace histogram [77, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:10,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 09:08:10,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:10,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:08:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash -194987276, now seen corresponding path program 4 times [2022-12-14 09:08:10,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:10,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518230385] [2022-12-14 09:08:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:10,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:10,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:08:10,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687314621] [2022-12-14 09:08:10,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:08:10,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:10,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:08:10,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:08:10,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:08:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:17,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-14 09:08:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:08:17,325 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:08:17,371 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-12-14 09:08:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3463 backedges. 2032 proven. 517 refuted. 0 times theorem prover too weak. 914 trivial. 0 not checked. [2022-12-14 09:08:24,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:08:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3463 backedges. 441 proven. 492 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2022-12-14 09:08:26,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:26,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518230385] [2022-12-14 09:08:26,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:08:26,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687314621] [2022-12-14 09:08:26,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687314621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:08:26,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576269151] [2022-12-14 09:08:26,679 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 09:08:26,679 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:08:26,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:08:26,679 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:08:26,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:08:26,699 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:08:26,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:08:26,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:26,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:08:26,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:26,826 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:08:26,833 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:08:26,841 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:08:26,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:08:26,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:26,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:26,916 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:08:26,930 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:08:26,962 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:08:26,966 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:08:27,857 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:08:27,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:08:27,917 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:08:28,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:08:28,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:28,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:28,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:28,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:28,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:08:28,125 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:08:34,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7501#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:08:34,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:08:34,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:08:34,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 41 [2022-12-14 09:08:34,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600862000] [2022-12-14 09:08:34,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:08:34,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 09:08:34,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 09:08:34,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=3568, Unknown=1, NotChecked=0, Total=3906 [2022-12-14 09:08:34,538 INFO L87 Difference]: Start difference. First operand 294 states and 353 transitions. Second operand has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 41 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 09:08:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:38,313 INFO L93 Difference]: Finished difference Result 298 states and 357 transitions. [2022-12-14 09:08:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 09:08:38,313 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 41 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 125 [2022-12-14 09:08:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:38,315 INFO L225 Difference]: With dead ends: 298 [2022-12-14 09:08:38,315 INFO L226 Difference]: Without dead ends: 296 [2022-12-14 09:08:38,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 306 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=506, Invalid=5193, Unknown=1, NotChecked=0, Total=5700 [2022-12-14 09:08:38,317 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 18 mSDsluCounter, 3833 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3988 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:38,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3988 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 09:08:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-14 09:08:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-12-14 09:08:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 196 states have (on average 1.6887755102040816) internal successors, (331), 279 states have internal predecessors, (331), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:08:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 355 transitions. [2022-12-14 09:08:38,323 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 355 transitions. Word has length 125 [2022-12-14 09:08:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:38,323 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 355 transitions. [2022-12-14 09:08:38,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 41 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 09:08:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 355 transitions. [2022-12-14 09:08:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 09:08:38,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:38,325 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:38,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:08:38,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 09:08:38,527 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:08:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1973433950, now seen corresponding path program 5 times [2022-12-14 09:08:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:38,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820866235] [2022-12-14 09:08:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:38,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:08:38,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295552698] [2022-12-14 09:08:38,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:08:38,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:08:38,779 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:08:38,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:08:39,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:08:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:08:39,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 09:08:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:08:39,226 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_3043 Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_3043) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:08:39,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:08:39,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 09:08:39,286 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:08:39,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:08:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1901 proven. 0 refuted. 0 times theorem prover too weak. 1685 trivial. 302 not checked. [2022-12-14 09:08:39,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:08:41,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:41,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820866235] [2022-12-14 09:08:41,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:08:41,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295552698] [2022-12-14 09:08:41,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295552698] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:08:41,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591385913] [2022-12-14 09:08:41,522 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 09:08:41,522 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:08:41,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:08:41,523 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:08:41,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:08:41,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:08:41,546 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:08:41,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:08:41,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:08:41,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:08:41,737 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:08:41,737 INFO L350 Elim1Store]: Elim1 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 182 treesize of output 185 [2022-12-14 09:08:41,761 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:08:41,761 INFO L350 Elim1Store]: Elim1 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 180 treesize of output 183 [2022-12-14 09:08:41,785 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:08:41,785 INFO L350 Elim1Store]: Elim1 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 174 treesize of output 177 [2022-12-14 09:08:41,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:41,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:41,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:08:41,895 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:08:41,900 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:08:41,922 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:08:41,926 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:08:42,664 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:08:42,698 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:08:42,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:08:42,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:42,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:42,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:08:42,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:42,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:08:42,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:08:42,929 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:08:47,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8549#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (< (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (not (= |ULTIMATE.start_l4_insert_#t~ret7#1.base| 0)) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:08:47,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:08:47,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:08:47,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-12-14 09:08:47,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830131177] [2022-12-14 09:08:47,462 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:08:47,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:08:47,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:47,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:08:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=970, Unknown=1, NotChecked=64, Total=1190 [2022-12-14 09:08:47,463 INFO L87 Difference]: Start difference. First operand 296 states and 355 transitions. Second operand has 11 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:08:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:48,060 INFO L93 Difference]: Finished difference Result 343 states and 408 transitions. [2022-12-14 09:08:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 09:08:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 130 [2022-12-14 09:08:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:48,063 INFO L225 Difference]: With dead ends: 343 [2022-12-14 09:08:48,063 INFO L226 Difference]: Without dead ends: 343 [2022-12-14 09:08:48,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 222 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=173, Invalid=1162, Unknown=1, NotChecked=70, Total=1406 [2022-12-14 09:08:48,064 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 192 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:48,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 586 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 986 Invalid, 0 Unknown, 219 Unchecked, 0.5s Time] [2022-12-14 09:08:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-12-14 09:08:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 292. [2022-12-14 09:08:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 196 states have (on average 1.6479591836734695) internal successors, (323), 275 states have internal predecessors, (323), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:08:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 347 transitions. [2022-12-14 09:08:48,069 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 347 transitions. Word has length 130 [2022-12-14 09:08:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:48,069 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 347 transitions. [2022-12-14 09:08:48,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:08:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 347 transitions. [2022-12-14 09:08:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 09:08:48,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:48,070 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:48,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 09:08:48,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:48,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:08:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:48,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1905192844, now seen corresponding path program 1 times [2022-12-14 09:08:48,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:48,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643966190] [2022-12-14 09:08:48,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:48,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:48,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:08:48,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911795040] [2022-12-14 09:08:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:48,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:48,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:08:48,372 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:08:48,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:08:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:48,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:08:48,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:08:48,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:08:48,798 INFO L350 Elim1Store]: Elim1 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 9 [2022-12-14 09:08:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1510 proven. 0 refuted. 0 times theorem prover too weak. 2378 trivial. 0 not checked. [2022-12-14 09:08:48,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:08:48,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:48,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643966190] [2022-12-14 09:08:48,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:08:48,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911795040] [2022-12-14 09:08:48,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911795040] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:48,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:48,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:08:48,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939609586] [2022-12-14 09:08:48,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:48,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:08:48,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:08:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:08:48,808 INFO L87 Difference]: Start difference. First operand 292 states and 347 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 09:08:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:49,031 INFO L93 Difference]: Finished difference Result 293 states and 347 transitions. [2022-12-14 09:08:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:08:49,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 132 [2022-12-14 09:08:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:49,032 INFO L225 Difference]: With dead ends: 293 [2022-12-14 09:08:49,032 INFO L226 Difference]: Without dead ends: 293 [2022-12-14 09:08:49,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:08:49,033 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 19 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:49,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 760 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:08:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-12-14 09:08:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2022-12-14 09:08:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 196 states have (on average 1.6377551020408163) internal successors, (321), 274 states have internal predecessors, (321), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:08:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 345 transitions. [2022-12-14 09:08:49,037 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 345 transitions. Word has length 132 [2022-12-14 09:08:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:49,037 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 345 transitions. [2022-12-14 09:08:49,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 09:08:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 345 transitions. [2022-12-14 09:08:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 09:08:49,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:49,038 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:49,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 09:08:49,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:49,239 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:08:49,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:49,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1905192843, now seen corresponding path program 1 times [2022-12-14 09:08:49,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:49,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226773193] [2022-12-14 09:08:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:49,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:49,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:08:49,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646455351] [2022-12-14 09:08:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:49,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:49,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:08:49,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:08:49,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:08:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:49,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 157 conjunts are in the unsatisfiable core [2022-12-14 09:08:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:08:49,788 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:09:14,319 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:09:14,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:09:14,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:09:19,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:09:19,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:09:22,874 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:09:22,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 09:09:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1493 proven. 1542 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2022-12-14 09:09:23,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:09:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1640 proven. 78 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2022-12-14 09:09:33,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226773193] [2022-12-14 09:09:33,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:09:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646455351] [2022-12-14 09:09:33,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646455351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:09:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732269965] [2022-12-14 09:09:33,911 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 09:09:33,911 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:09:33,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:09:33,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:09:33,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:09:33,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:09:33,937 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:09:33,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:09:33,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:09:33,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:09:34,022 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:09:34,030 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:09:34,038 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:09:34,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:09:34,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:09:34,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:09:34,110 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:09:34,123 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:09:34,144 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:09:34,157 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:09:34,968 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:09:34,979 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:09:34,991 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:09:35,099 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:09:35,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:09:35,158 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:09:35,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:09:35,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:09:35,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:09:35,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:09:35,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:09:35,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:09:35,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:10:20,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11061#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (= |ULTIMATE.start_l4_insert_#t~mem8#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (not (<= (+ |ULTIMATE.start_l4_insert_#t~mem8#1.offset| 4) (select |#length| |ULTIMATE.start_l4_insert_#t~mem8#1.base|))) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) |ULTIMATE.start_l4_insert_#t~mem8#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:10:20,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:10:20,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:10:20,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 20] total 70 [2022-12-14 09:10:20,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562976611] [2022-12-14 09:10:20,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:10:20,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 09:10:20,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:20,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 09:10:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=8356, Unknown=11, NotChecked=0, Total=8930 [2022-12-14 09:10:20,291 INFO L87 Difference]: Start difference. First operand 291 states and 345 transitions. Second operand has 71 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 67 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 09:10:22,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:10:34,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:10:38,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:10:42,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:10:48,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:10:53,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:04,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:08,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:15,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:18,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:26,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:51,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:53,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:12:08,049 WARN L233 SmtUtils]: Spent 12.79s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:12:10,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:12:19,751 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:12:38,839 WARN L233 SmtUtils]: Spent 12.61s on a formula simplification. DAG size of input: 52 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:12:50,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:12:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:50,610 INFO L93 Difference]: Finished difference Result 425 states and 541 transitions. [2022-12-14 09:12:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 09:12:50,611 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 67 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 132 [2022-12-14 09:12:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:50,612 INFO L225 Difference]: With dead ends: 425 [2022-12-14 09:12:50,612 INFO L226 Difference]: Without dead ends: 425 [2022-12-14 09:12:50,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 296 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 194.5s TimeCoverageRelationStatistics Valid=989, Invalid=12558, Unknown=25, NotChecked=0, Total=13572 [2022-12-14 09:12:50,614 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 154 mSDsluCounter, 3683 mSDsCounter, 0 mSdLazyCounter, 5703 mSolverCounterSat, 14 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 3788 SdHoareTripleChecker+Invalid, 5732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5703 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:50,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 3788 Invalid, 5732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 5703 Invalid, 15 Unknown, 0 Unchecked, 41.2s Time] [2022-12-14 09:12:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-12-14 09:12:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 290. [2022-12-14 09:12:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 196 states have (on average 1.6275510204081634) internal successors, (319), 273 states have internal predecessors, (319), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:12:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 343 transitions. [2022-12-14 09:12:50,622 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 343 transitions. Word has length 132 [2022-12-14 09:12:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:50,622 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 343 transitions. [2022-12-14 09:12:50,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 67 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 09:12:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 343 transitions. [2022-12-14 09:12:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 09:12:50,624 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:50,624 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:50,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:12:50,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:12:50,825 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:12:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:50,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1233956595, now seen corresponding path program 1 times [2022-12-14 09:12:50,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:50,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535587546] [2022-12-14 09:12:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:50,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:50,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:12:50,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836583668] [2022-12-14 09:12:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:50,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:12:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:12:50,883 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:12:50,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:12:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:51,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1813 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 09:12:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:12:51,400 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6145 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6145))) is different from true [2022-12-14 09:12:51,471 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:12:51,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-12-14 09:12:51,487 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6146 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6146))) is different from true [2022-12-14 09:12:51,591 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:12:51,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-12-14 09:12:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1946 proven. 472 refuted. 0 times theorem prover too weak. 1467 trivial. 3 not checked. [2022-12-14 09:12:51,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:12:51,963 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:12:51,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-12-14 09:12:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1946 proven. 474 refuted. 0 times theorem prover too weak. 1468 trivial. 0 not checked. [2022-12-14 09:12:51,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535587546] [2022-12-14 09:12:51,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:12:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836583668] [2022-12-14 09:12:51,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836583668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:12:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [888583056] [2022-12-14 09:12:51,976 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 09:12:51,976 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:12:51,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:12:51,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:12:51,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:12:51,994 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:12:51,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:12:52,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:12:52,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:12:52,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:12:52,076 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:12:52,077 INFO L350 Elim1Store]: Elim1 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 182 treesize of output 185 [2022-12-14 09:12:52,104 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:12:52,104 INFO L350 Elim1Store]: Elim1 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 178 treesize of output 181 [2022-12-14 09:12:52,129 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:12:52,129 INFO L350 Elim1Store]: Elim1 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 176 treesize of output 179 [2022-12-14 09:12:52,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:12:52,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:12:52,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:12:52,222 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:12:52,227 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:12:52,249 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:12:52,253 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:12:53,026 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:12:53,036 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:12:53,044 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:12:53,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:53,102 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 144 treesize of output 92 [2022-12-14 09:12:53,123 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:12:53,123 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 88 [2022-12-14 09:12:53,133 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 1 [2022-12-14 09:12:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:53,185 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-12-14 09:12:53,186 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 09:12:53,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:53,218 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:12:53,219 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 55 [2022-12-14 09:12:53,241 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:12:53,316 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:12:53,341 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:12:53,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:12:53,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:12:53,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:12:53,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:12:53,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:12:53,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:12:53,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:12:53,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:13:00,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12657#(and (not (= (select |#valid| |ULTIMATE.start_l4_insert_~list#1.base|) 1)) (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~list#1.base|) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (or (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.base|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 4 (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 1) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:13:00,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:13:00,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:13:00,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2022-12-14 09:13:00,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500059385] [2022-12-14 09:13:00,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:13:00,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:13:00,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:00,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:13:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1208, Unknown=2, NotChecked=146, Total=1560 [2022-12-14 09:13:00,344 INFO L87 Difference]: Start difference. First operand 290 states and 343 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 09:13:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:00,889 INFO L93 Difference]: Finished difference Result 318 states and 370 transitions. [2022-12-14 09:13:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:13:00,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 134 [2022-12-14 09:13:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:00,892 INFO L225 Difference]: With dead ends: 318 [2022-12-14 09:13:00,892 INFO L226 Difference]: Without dead ends: 318 [2022-12-14 09:13:00,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 351 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=242, Invalid=1656, Unknown=2, NotChecked=170, Total=2070 [2022-12-14 09:13:00,893 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 197 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:00,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 812 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 752 Invalid, 0 Unknown, 390 Unchecked, 0.4s Time] [2022-12-14 09:13:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-12-14 09:13:00,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 286. [2022-12-14 09:13:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 196 states have (on average 1.586734693877551) internal successors, (311), 269 states have internal predecessors, (311), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:13:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 335 transitions. [2022-12-14 09:13:00,898 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 335 transitions. Word has length 134 [2022-12-14 09:13:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:00,899 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 335 transitions. [2022-12-14 09:13:00,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 09:13:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 335 transitions. [2022-12-14 09:13:00,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 09:13:00,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:00,900 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:13:00,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 09:13:01,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:01,101 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:13:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:01,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1233956594, now seen corresponding path program 1 times [2022-12-14 09:13:01,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:01,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061501911] [2022-12-14 09:13:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:01,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:01,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:13:01,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423714833] [2022-12-14 09:13:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:01,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:01,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:01,152 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:13:01,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:13:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1813 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-14 09:13:01,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:13:01,671 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:13:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:19,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:13:19,273 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:13:19,274 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:13:19,986 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_7200 Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_7200) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:13:20,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:20,096 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-14 09:13:20,109 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 09:13:20,109 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-14 09:13:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1658 proven. 598 refuted. 0 times theorem prover too weak. 890 trivial. 742 not checked. [2022-12-14 09:13:20,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:13:21,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061501911] [2022-12-14 09:13:21,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:13:21,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423714833] [2022-12-14 09:13:21,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423714833] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:13:21,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292886285] [2022-12-14 09:13:21,198 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 09:13:21,199 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:13:21,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:13:21,199 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:13:21,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:13:21,223 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:13:21,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:13:21,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:13:21,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:13:21,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:13:21,316 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:13:21,327 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:13:21,337 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:13:21,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:13:21,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:13:21,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:13:21,443 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:13:21,448 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:13:21,479 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:13:21,497 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:13:22,454 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:13:22,464 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:13:22,485 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:13:22,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:22,551 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 144 treesize of output 92 [2022-12-14 09:13:22,584 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:13:22,585 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 88 [2022-12-14 09:13:22,598 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 1 [2022-12-14 09:13:22,649 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:13:22,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:22,677 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:13:22,678 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 75 [2022-12-14 09:13:22,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:22,704 INFO L321 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2022-12-14 09:13:22,705 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 88 treesize of output 75 [2022-12-14 09:13:22,805 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:13:22,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:13:22,862 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:13:22,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:13:22,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:13:23,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:13:23,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:13:23,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:13:23,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:13:23,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:01,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13749#(and (not (= |ULTIMATE.start_l1_insert_~item~3#1.base| 0)) (not (= |ULTIMATE.start_l4_insert_~item~0#1.base| 0)) (= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (= |ULTIMATE.start_l4_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.base| |ULTIMATE.start_l4_insert_#in~list#1.base|) (or (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) |ULTIMATE.start_l4_insert_~item~0#1.base|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (not (= |ULTIMATE.start_l2_insert_~item~2#1.base| 0)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~list#1.base|) (not (= |ULTIMATE.start_l0_insert_~item~4#1.base| 0)) (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= |ULTIMATE.start_l2_insert_~item~2#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 3) 1) (= |ULTIMATE.start_l0_insert_~item~4#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (not (= |ULTIMATE.start_l3_insert_~item~1#1.base| 0)) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 4) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (< (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 8) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 1) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:14:01,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:01,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:14:01,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-12-14 09:14:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048631713] [2022-12-14 09:14:01,077 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:01,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 09:14:01,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 09:14:01,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2713, Unknown=10, NotChecked=106, Total=3080 [2022-12-14 09:14:01,079 INFO L87 Difference]: Start difference. First operand 286 states and 335 transitions. Second operand has 28 states, 25 states have (on average 2.0) internal successors, (50), 26 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:14:03,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:14:06,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:14:10,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:14:12,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:14:14,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:14:16,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:14:20,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:14:24,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:14:39,484 WARN L233 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 57 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:14:55,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:14:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:57,124 INFO L93 Difference]: Finished difference Result 316 states and 367 transitions. [2022-12-14 09:14:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 09:14:57,124 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.0) internal successors, (50), 26 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 134 [2022-12-14 09:14:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:57,125 INFO L225 Difference]: With dead ends: 316 [2022-12-14 09:14:57,125 INFO L226 Difference]: Without dead ends: 316 [2022-12-14 09:14:57,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 214 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 86.5s TimeCoverageRelationStatistics Valid=361, Invalid=4186, Unknown=13, NotChecked=132, Total=4692 [2022-12-14 09:14:57,127 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 301 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 21 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:57,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1439 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2158 Invalid, 7 Unknown, 191 Unchecked, 25.3s Time] [2022-12-14 09:14:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-12-14 09:14:57,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 284. [2022-12-14 09:14:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 196 states have (on average 1.566326530612245) internal successors, (307), 267 states have internal predecessors, (307), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:14:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-12-14 09:14:57,132 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 134 [2022-12-14 09:14:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:57,132 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-12-14 09:14:57,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.0) internal successors, (50), 26 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:14:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-12-14 09:14:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 09:14:57,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:57,133 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:14:57,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:14:57,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 09:14:57,334 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:14:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:57,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1145578016, now seen corresponding path program 1 times [2022-12-14 09:14:57,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:57,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864102833] [2022-12-14 09:14:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:57,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:57,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:14:57,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046710142] [2022-12-14 09:14:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:57,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:57,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:57,379 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:57,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:15:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:04,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1857 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 09:15:04,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:04,646 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:15:15,235 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8273 Int) (v_ArrVal_8274 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_8274)) (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_8273)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:15:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:15,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:15:15,388 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:15:15,388 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:15:15,487 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| Int)) (and (exists ((v_ArrVal_8275 Int)) (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_8275) |c_#length|)) (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) 0))) is different from true [2022-12-14 09:15:15,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:15,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:15:15,636 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:15:15,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:15:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1418 proven. 573 refuted. 0 times theorem prover too weak. 725 trivial. 1172 not checked. [2022-12-14 09:15:16,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:15:18,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:18,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864102833] [2022-12-14 09:15:18,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:15:18,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046710142] [2022-12-14 09:15:18,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046710142] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:18,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1622726027] [2022-12-14 09:15:18,927 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-12-14 09:15:18,927 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:15:18,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:15:18,927 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:15:18,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:15:18,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:15:18,951 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:15:18,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:15:19,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:15:19,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:15:19,046 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:15:19,057 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:15:19,069 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:15:19,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:15:19,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:15:19,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:15:19,149 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:15:19,167 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:15:19,209 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:15:19,216 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:15:20,126 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:15:20,148 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:15:20,160 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:15:20,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,210 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 144 treesize of output 92 [2022-12-14 09:15:20,244 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:15:20,244 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 88 [2022-12-14 09:15:20,258 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 1 [2022-12-14 09:15:20,322 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:15:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,354 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:15:20,354 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 55 [2022-12-14 09:15:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,389 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-12-14 09:15:20,389 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 09:15:20,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:20,487 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:15:20,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 55 [2022-12-14 09:15:20,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:20,516 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:15:20,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 74 [2022-12-14 09:15:20,541 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:15:20,606 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:15:20,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:20,677 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-12-14 09:15:20,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 80 [2022-12-14 09:15:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:20,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:20,747 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-12-14 09:15:20,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 130 treesize of output 111 [2022-12-14 09:15:20,878 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:15:20,923 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:15:20,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:15:21,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:15:21,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:15:21,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:15:21,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:15:21,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:15:21,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:15:21,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:16:00,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14881#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (< (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12)) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-12-14 09:16:00,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:16:00,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:16:00,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-12-14 09:16:00,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629069109] [2022-12-14 09:16:00,679 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:16:00,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 09:16:00,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 09:16:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3861, Unknown=6, NotChecked=254, Total=4422 [2022-12-14 09:16:00,680 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:16:02,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:04,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:07,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:10,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:14,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:18,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:21,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:23,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:25,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:27,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:29,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:32,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:34,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:49,781 WARN L233 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 56 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:16:57,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:16:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:59,545 INFO L93 Difference]: Finished difference Result 310 states and 357 transitions. [2022-12-14 09:16:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 09:16:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 138 [2022-12-14 09:16:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:59,546 INFO L225 Difference]: With dead ends: 310 [2022-12-14 09:16:59,547 INFO L226 Difference]: Without dead ends: 310 [2022-12-14 09:16:59,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 214 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 75.2s TimeCoverageRelationStatistics Valid=439, Invalid=6202, Unknown=9, NotChecked=322, Total=6972 [2022-12-14 09:16:59,547 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 196 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 10 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 3172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 36.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:59,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1933 Invalid, 3172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2750 Invalid, 14 Unknown, 398 Unchecked, 36.0s Time] [2022-12-14 09:16:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-12-14 09:16:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 282. [2022-12-14 09:16:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 196 states have (on average 1.5459183673469388) internal successors, (303), 265 states have internal predecessors, (303), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:16:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 327 transitions. [2022-12-14 09:16:59,551 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 327 transitions. Word has length 138 [2022-12-14 09:16:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:59,552 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 327 transitions. [2022-12-14 09:16:59,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:16:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 327 transitions. [2022-12-14 09:16:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 09:16:59,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:59,553 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:59,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 09:16:59,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 09:16:59,753 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:16:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:59,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1153180116, now seen corresponding path program 1 times [2022-12-14 09:16:59,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:59,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702110444] [2022-12-14 09:16:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:59,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:59,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:16:59,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698889487] [2022-12-14 09:16:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:59,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:59,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:59,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 09:17:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:17:00,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 09:17:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:17:00,525 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:17:00,525 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:00,578 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9360 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_9360)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:17:00,660 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:17:00,660 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 33 [2022-12-14 09:17:00,700 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9361 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_9361))) is different from true [2022-12-14 09:17:00,846 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-12-14 09:17:00,846 INFO L350 Elim1Store]: Elim1 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 22 [2022-12-14 09:17:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 1645 proven. 774 refuted. 0 times theorem prover too weak. 821 trivial. 648 not checked. [2022-12-14 09:17:00,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:17:01,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:17:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702110444] [2022-12-14 09:17:01,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:17:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698889487] [2022-12-14 09:17:01,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698889487] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:17:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903925715] [2022-12-14 09:17:01,178 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 09:17:01,178 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:17:01,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:17:01,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:17:01,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:17:01,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:17:01,202 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:17:01,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:01,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:01,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:17:01,284 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:17:01,293 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:17:01,302 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:17:01,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:01,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:17:01,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:01,378 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:01,383 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:01,415 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:01,419 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:02,154 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:02,169 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:17:02,176 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:02,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,237 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 144 treesize of output 92 [2022-12-14 09:17:02,256 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:17:02,257 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 88 [2022-12-14 09:17:02,266 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 1 [2022-12-14 09:17:02,313 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:17:02,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,334 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:17:02,334 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 75 [2022-12-14 09:17:02,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,356 INFO L321 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2022-12-14 09:17:02,356 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 88 treesize of output 75 [2022-12-14 09:17:02,420 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:17:02,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:02,455 INFO L321 Elim1Store]: treesize reduction 111, result has 10.5 percent of original size [2022-12-14 09:17:02,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 94 [2022-12-14 09:17:02,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:02,475 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:17:02,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 74 [2022-12-14 09:17:02,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:02,580 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-12-14 09:17:02,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 100 treesize of output 93 [2022-12-14 09:17:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:02,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:02,646 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-12-14 09:17:02,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 80 [2022-12-14 09:17:02,670 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:17:02,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:17:02,739 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:17:02,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:17:02,846 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:17:02,871 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:17:02,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:17:02,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:17:03,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:17:03,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:17:03,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:03,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:03,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:17:03,088 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:17:12,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16089#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (not (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1)) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8))) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) |ULTIMATE.start_l3_insert_~list#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12) (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-12-14 09:17:12,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:17:12,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:17:12,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-12-14 09:17:12,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992857037] [2022-12-14 09:17:12,850 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:17:12,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:17:12,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:17:12,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:17:12,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1915, Unknown=2, NotChecked=182, Total=2352 [2022-12-14 09:17:12,851 INFO L87 Difference]: Start difference. First operand 282 states and 327 transitions. Second operand has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:17:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:17:14,170 INFO L93 Difference]: Finished difference Result 308 states and 352 transitions. [2022-12-14 09:17:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:17:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 139 [2022-12-14 09:17:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:17:14,171 INFO L225 Difference]: With dead ends: 308 [2022-12-14 09:17:14,171 INFO L226 Difference]: Without dead ends: 308 [2022-12-14 09:17:14,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=297, Invalid=2465, Unknown=2, NotChecked=206, Total=2970 [2022-12-14 09:17:14,172 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 255 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 31 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:17:14,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 925 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 894 Invalid, 35 Unknown, 400 Unchecked, 1.1s Time] [2022-12-14 09:17:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-12-14 09:17:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 278. [2022-12-14 09:17:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 196 states have (on average 1.5051020408163265) internal successors, (295), 261 states have internal predecessors, (295), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:17:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 319 transitions. [2022-12-14 09:17:14,176 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 319 transitions. Word has length 139 [2022-12-14 09:17:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:17:14,176 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 319 transitions. [2022-12-14 09:17:14,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 13 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:17:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 319 transitions. [2022-12-14 09:17:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 09:17:14,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:17:14,177 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:17:14,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 09:17:14,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:17:14,379 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:17:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:17:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1153180115, now seen corresponding path program 1 times [2022-12-14 09:17:14,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:17:14,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474911373] [2022-12-14 09:17:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:17:14,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:17:14,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:17:14,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923484814] [2022-12-14 09:17:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:17:14,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:17:14,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:17:14,434 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:17:14,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 09:17:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:17:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 136 conjunts are in the unsatisfiable core [2022-12-14 09:17:24,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:17:24,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:17:24,952 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:39,505 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:17:39,505 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:39,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:17:41,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:41,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:17:41,216 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:17:41,216 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:42,301 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_10454 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_10454) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:17:42,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:42,414 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-14 09:17:42,426 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 09:17:42,426 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-14 09:17:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 974 proven. 1232 refuted. 0 times theorem prover too weak. 523 trivial. 1159 not checked. [2022-12-14 09:17:43,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:17:43,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:17:43,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474911373] [2022-12-14 09:17:43,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:17:43,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923484814] [2022-12-14 09:17:43,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923484814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:17:43,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847236733] [2022-12-14 09:17:43,998 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 09:17:43,998 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:17:43,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:17:43,998 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:17:43,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:17:44,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:17:44,021 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:17:44,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:44,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:17:44,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:44,082 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:17:44,091 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:17:44,100 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:17:44,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:44,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:17:44,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:44,164 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:44,178 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:44,207 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:44,212 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:44,918 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:44,927 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:17:44,939 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:17:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:44,987 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 144 treesize of output 92 [2022-12-14 09:17:45,005 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:17:45,006 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 88 [2022-12-14 09:17:45,014 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 1 [2022-12-14 09:17:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,070 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-12-14 09:17:45,070 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 09:17:45,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,094 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:17:45,094 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 55 [2022-12-14 09:17:45,113 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:17:45,169 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:17:45,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:45,195 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:17:45,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 55 [2022-12-14 09:17:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:45,213 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:17:45,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 74 [2022-12-14 09:17:45,263 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:17:45,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:45,318 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-12-14 09:17:45,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 80 [2022-12-14 09:17:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:45,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:45,364 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-12-14 09:17:45,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 130 treesize of output 111 [2022-12-14 09:17:45,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:17:45,434 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:17:45,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:17:45,527 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:17:45,567 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:17:45,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:17:45,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:17:45,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:17:45,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:17:45,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:45,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:17:45,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:17:45,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:18:30,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17212#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8))) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) |ULTIMATE.start_l3_insert_~list#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|) (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4)) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12) (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-12-14 09:18:30,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:18:30,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:18:30,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-12-14 09:18:30,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533572989] [2022-12-14 09:18:30,537 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:18:30,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 09:18:30,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:18:30,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 09:18:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=4928, Unknown=8, NotChecked=142, Total=5402 [2022-12-14 09:18:30,538 INFO L87 Difference]: Start difference. First operand 278 states and 319 transitions. Second operand has 41 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:18:32,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:18:34,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:18:38,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:18:43,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:18:45,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:18:49,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:18:53,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:18:57,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:19:00,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:19:02,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:19:04,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:19:09,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:19:11,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:19:13,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:19:31,570 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 75 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:19:49,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:19:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:19:50,093 INFO L93 Difference]: Finished difference Result 303 states and 343 transitions. [2022-12-14 09:19:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 09:19:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 139 [2022-12-14 09:19:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:19:50,094 INFO L225 Difference]: With dead ends: 303 [2022-12-14 09:19:50,094 INFO L226 Difference]: Without dead ends: 303 [2022-12-14 09:19:50,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 211 SyntacticMatches, 8 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 103.8s TimeCoverageRelationStatistics Valid=506, Invalid=7854, Unknown=16, NotChecked=180, Total=8556 [2022-12-14 09:19:50,095 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 376 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 3166 mSolverCounterSat, 27 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3166 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 37.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:19:50,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 2033 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3166 Invalid, 15 Unknown, 198 Unchecked, 37.3s Time] [2022-12-14 09:19:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-12-14 09:19:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-12-14 09:19:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 196 states have (on average 1.4642857142857142) internal successors, (287), 257 states have internal predecessors, (287), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:19:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 311 transitions. [2022-12-14 09:19:50,099 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 311 transitions. Word has length 139 [2022-12-14 09:19:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:19:50,099 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 311 transitions. [2022-12-14 09:19:50,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 09:19:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 311 transitions. [2022-12-14 09:19:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 09:19:50,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:19:50,100 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:19:50,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 09:19:50,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:19:50,302 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:19:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:19:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash 134935428, now seen corresponding path program 1 times [2022-12-14 09:19:50,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:19:50,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629076584] [2022-12-14 09:19:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:19:50,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:19:50,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:19:50,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094403178] [2022-12-14 09:19:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:19:50,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:19:50,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:19:50,372 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:19:50,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 09:19:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:19:50,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 09:19:51,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:19:51,061 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11574 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_11574)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:19:51,116 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:19:51,116 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:19:51,124 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11575 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_11575))) is different from true [2022-12-14 09:19:51,141 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11575 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_11575))) is different from true [2022-12-14 09:19:51,149 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:19:51,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-12-14 09:19:51,177 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11576 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_11576))) is different from true [2022-12-14 09:19:51,195 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11576 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_11576))) is different from true [2022-12-14 09:19:51,204 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:19:51,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 22 [2022-12-14 09:19:51,234 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_11577 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_11577))) is different from true [2022-12-14 09:19:51,332 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:19:51,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 25 [2022-12-14 09:19:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 998 proven. 301 refuted. 0 times theorem prover too weak. 650 trivial. 1939 not checked. [2022-12-14 09:19:53,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:19:53,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:19:53,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629076584] [2022-12-14 09:19:53,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:19:53,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094403178] [2022-12-14 09:19:53,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094403178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:19:53,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086030063] [2022-12-14 09:19:53,262 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-12-14 09:19:53,262 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:19:53,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:19:53,262 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:19:53,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:19:53,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:19:53,296 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:19:53,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:19:53,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:19:53,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:19:53,369 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:19:53,378 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:19:53,387 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:19:53,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:19:53,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:19:53,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:19:53,471 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:19:53,477 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:19:53,524 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:19:53,529 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:19:54,379 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:19:54,388 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:19:54,397 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:19:54,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,456 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 144 treesize of output 92 [2022-12-14 09:19:54,476 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:19:54,476 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 88 [2022-12-14 09:19:54,484 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 1 [2022-12-14 09:19:54,535 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:19:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,558 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:19:54,558 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 55 [2022-12-14 09:19:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,584 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-12-14 09:19:54,584 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 09:19:54,649 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:19:54,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:54,680 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:19:54,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 55 [2022-12-14 09:19:54,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:54,706 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:19:54,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 74 [2022-12-14 09:19:54,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:54,802 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-12-14 09:19:54,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 100 treesize of output 93 [2022-12-14 09:19:54,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:54,858 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-12-14 09:19:54,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 80 [2022-12-14 09:19:54,883 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:19:54,925 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:19:54,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:19:54,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:19:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:54,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:54,993 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:19:54,993 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-12-14 09:19:55,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:55,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:55,013 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:19:55,013 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-12-14 09:19:55,022 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:19:55,049 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:19:55,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:55,080 INFO L321 Elim1Store]: treesize reduction 14, result has 61.1 percent of original size [2022-12-14 09:19:55,081 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2022-12-14 09:19:55,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:55,115 INFO L321 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2022-12-14 09:19:55,115 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 40 [2022-12-14 09:19:55,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:55,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:55,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:55,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:55,177 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:19:55,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 46 treesize of output 51 [2022-12-14 09:19:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:55,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:19:55,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:19:55,205 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:19:55,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 48 treesize of output 47 [2022-12-14 09:19:55,218 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:19:55,324 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:19:55,353 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:19:55,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:19:55,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:19:55,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:19:55,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:19:55,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:19:55,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:19:55,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:19:55,545 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:20:06,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18363#(and (or (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)))) (<= (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (<= |~#list~0.base| 3) (= |ULTIMATE.start_l2_insert_~list#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~item~2#1.base|) |ULTIMATE.start_l2_insert_~item~2#1.offset|)) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (= |ULTIMATE.start_l2_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~item~2#1.base|) |ULTIMATE.start_l2_insert_~item~2#1.offset|)) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~item~2#1.base|)) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|)) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) |ULTIMATE.start_l3_insert_~list#1.base|) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (= |ULTIMATE.start_l3_insert_~list#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)))) (<= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)))) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1)) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 8 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|) |ULTIMATE.start_l3_insert_~item~1#1.base|) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l2_insert_~item~2#1.base|) 1) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 8 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 12) (select |#length| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 8) (<= |~#list~0.offset| 0))' at error location [2022-12-14 09:20:06,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:20:06,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:20:06,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-12-14 09:20:06,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078024924] [2022-12-14 09:20:06,180 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:20:06,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:20:06,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:20:06,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:20:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2656, Unknown=36, NotChecked=666, Total=3660 [2022-12-14 09:20:06,182 INFO L87 Difference]: Start difference. First operand 274 states and 311 transitions. Second operand has 22 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 09:20:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:20:07,214 INFO L93 Difference]: Finished difference Result 296 states and 330 transitions. [2022-12-14 09:20:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:20:07,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 144 [2022-12-14 09:20:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:20:07,215 INFO L225 Difference]: With dead ends: 296 [2022-12-14 09:20:07,216 INFO L226 Difference]: Without dead ends: 296 [2022-12-14 09:20:07,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 239 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=350, Invalid=3298, Unknown=36, NotChecked=738, Total=4422 [2022-12-14 09:20:07,216 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 289 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 36 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 1114 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:20:07,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 918 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 850 Invalid, 35 Unknown, 1114 Unchecked, 0.8s Time] [2022-12-14 09:20:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-14 09:20:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 270. [2022-12-14 09:20:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 196 states have (on average 1.4234693877551021) internal successors, (279), 253 states have internal predecessors, (279), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:20:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 303 transitions. [2022-12-14 09:20:07,220 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 303 transitions. Word has length 144 [2022-12-14 09:20:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:20:07,220 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 303 transitions. [2022-12-14 09:20:07,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 09:20:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 303 transitions. [2022-12-14 09:20:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 09:20:07,221 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:20:07,221 INFO L195 NwaCegarLoop]: trace histogram [82, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:20:07,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 09:20:07,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:20:07,423 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2022-12-14 09:20:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:20:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash 134935429, now seen corresponding path program 1 times [2022-12-14 09:20:07,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:20:07,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945805852] [2022-12-14 09:20:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:20:07,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:20:07,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:20:07,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080666067] [2022-12-14 09:20:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:20:07,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:20:07,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:20:07,483 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:20:07,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b37bff-7ee1-4a13-b12c-bac5f8a83f61/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 09:20:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:20:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 180 conjunts are in the unsatisfiable core [2022-12-14 09:20:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:20:14,597 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:20:26,734 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_12698 Int) (v_ArrVal_12699 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12699)) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12698)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:20:26,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:20:26,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:20:26,927 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:20:26,928 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:20:27,170 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_12700 Int) (v_ArrVal_12701 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12700) |c_#valid|) (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12701) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:20:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:20:27,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:20:27,391 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:20:27,391 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:20:28,130 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:20:28,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 22 [2022-12-14 09:20:28,294 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:20:28,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:20:30,566 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_12703 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|))) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12703) |c_#length|) (<= (mod .cse0 4294967296) v_ArrVal_12703) (= |c_zalloc_or_die_#Ultimate.C_memset_#amount#1| .cse0)))) is different from true [2022-12-14 09:20:33,766 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_12703 Int) (|zalloc_or_die_calloc_model_~size#1| Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (|zalloc_or_die_calloc_model_~nmemb#1| Int)) (let ((.cse0 (mod (* |zalloc_or_die_calloc_model_~nmemb#1| |zalloc_or_die_calloc_model_~size#1|) 4294967296))) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_12703) |c_#length|) (< 12 .cse0) (<= .cse0 v_ArrVal_12703)))) is different from true [2022-12-14 09:20:34,862 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:20:34,862 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 22 [2022-12-14 09:20:48,956 WARN L233 SmtUtils]: Spent 10.51s on a formula simplification. DAG size of input: 38 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:20:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 45 proven. 1231 refuted. 0 times theorem prover too weak. 284 trivial. 2328 not checked. [2022-12-14 09:20:56,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:21:13,909 WARN L233 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:21:13,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:21:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945805852] [2022-12-14 09:21:13,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:21:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080666067] [2022-12-14 09:21:13,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080666067] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:21:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2034791337] [2022-12-14 09:21:13,912 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-12-14 09:21:13,912 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:21:13,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:21:13,912 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:21:13,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:21:13,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:21:13,939 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:21:13,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:21:13,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:21:13,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:21:14,028 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:21:14,038 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 196 [2022-12-14 09:21:14,049 INFO L350 Elim1Store]: Elim1 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 195 treesize of output 194 [2022-12-14 09:21:14,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:21:14,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:21:14,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:21:14,115 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:21:14,122 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:21:14,158 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:21:14,172 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:21:14,973 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:21:14,985 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:21:15,002 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:21:15,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,062 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 144 treesize of output 92 [2022-12-14 09:21:15,083 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:21:15,084 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 88 [2022-12-14 09:21:15,092 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 1 [2022-12-14 09:21:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,151 INFO L321 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2022-12-14 09:21:15,152 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 78 treesize of output 65 [2022-12-14 09:21:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,174 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:21:15,175 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 55 [2022-12-14 09:21:15,191 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:21:15,249 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:21:15,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,276 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:21:15,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 74 [2022-12-14 09:21:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,300 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:21:15,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 55 [2022-12-14 09:21:15,350 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:21:15,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,408 INFO L321 Elim1Store]: treesize reduction 64, result has 40.2 percent of original size [2022-12-14 09:21:15,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 80 [2022-12-14 09:21:15,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,474 INFO L321 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2022-12-14 09:21:15,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 130 treesize of output 111 [2022-12-14 09:21:15,531 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:21:15,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:21:15,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:21:15,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,601 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:21:15,601 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-12-14 09:21:15,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,617 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:21:15,617 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-12-14 09:21:15,630 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 1 [2022-12-14 09:21:15,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,684 INFO L321 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2022-12-14 09:21:15,685 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 40 [2022-12-14 09:21:15,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,722 INFO L321 Elim1Store]: treesize reduction 14, result has 61.1 percent of original size [2022-12-14 09:21:15,722 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2022-12-14 09:21:15,736 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:21:15,780 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 1 [2022-12-14 09:21:15,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,802 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:21:15,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 46 treesize of output 51 [2022-12-14 09:21:15,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:21:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:21:15,829 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:21:15,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 48 treesize of output 47 [2022-12-14 09:21:15,926 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 79 for LOIs [2022-12-14 09:21:15,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:21:15,968 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2022-12-14 09:21:16,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:21:16,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:21:16,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:21:16,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:21:16,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 09:21:16,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:21:16,167 INFO L180 IcfgInterpreter]: Interpretation finished